Top 20 AWS ECR Interview Questions and Answers

Developers can easily exchange and deploy container images and artefacts with Amazon ECR, a fully managed container registry. Your development to production process will be made simpler by Amazon ECR's integration with Amazon Elastic Container Service (Amazon ECS), Amazon Elastic Kubernetes Service (Amazon EKS), and AWS Lambda. Operating your own container repository and worrying about growing the underlying infrastructure are not necessary with Amazon ECR. You may deploy containers for your apps with confidence with Amazon ECR since it hosts your images in a highly available and scalable architecture. You may share photographs with everyone in the world or with other members of your business thanks to integration with AWS Identity and Access Management (IAM).

AWS(Amazon Web Services) Interview Questions and Answers

AWS Cloud Interview Questions and Answers

Ques. 1): A worldwide service, is Amazon ECR?

Answer:

A regional service called Amazon ECR is meant to allow you freedom over how pictures are delivered. For optimal speed, you can upload and download images to the same AWS Region as your Docker cluster. Additionally, you may access Amazon ECR from any location where Docker is installed, including desktops and on-premises settings. Images pulled from other Regions or the internet will incur more delay and data transfer fees.

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Ques. 2): How can I organise my repositories and photos the best manner possible?

Answer:

In order to create, monitor, and remove repositories as well as modify repository permissions, Amazon ECR offers a command line interface and APIs. The same operations may be carried out in the Amazon ECR console by going to the "Repositories" section of the panel. You can publish, pull, and tag images via the Docker CLI using Amazon ECR, which is integrated with Docker.

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Ques. 3): Why need I to utilise Amazon ECR?

Answer:

The infrastructure needed to run and grow your container registry is no longer necessary thanks to Amazon ECR. You may deploy new containers for your applications with confidence by using Amazon ECR, which leverages Amazon Simple Storage Service (S3) for storage to make your container images highly available and accessible. Your container images are sent over HTTPS and automatically encrypted while they are at rest by Amazon ECR. Each repository's permissions may be managed by policies that limit access to IAM users, roles, or other AWS accounts. You may streamline your development and production operations by integrating Amazon ECR with Amazon ECS, Amazon EKS, AWS Fargate, AWS Lambda, and the Docker CLI. You can easily push your container images to Amazon ECR using the Docker CLI from your development machine, and Amazon container orchestrators or compute can pull them directly for production deployments.

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Ques. 4): Does AWS Elastic Beanstalk work with Amazon ECR?

Answer:

Yes. You may quickly deploy container images stored in Amazon ECR using AWS Elastic Beanstalk since it supports Amazon ECR for both single-container and multi-container Docker environments. You just need to apply the AmazonEC2ContainerRegistryReadOnly policy to your container instance role and provide the Amazon ECR repository in your Dockerrun.aws.json configuration.

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Ques. 5): How can Amazon ECR contribute to the safety of container images?

Answer:

When transferring your container images over HTTPS, Amazon ECR automatically encrypts the images at rest using either AWS KMS or Amazon S3 server-side encryption. Instead of managing credentials directly on your EC2 instances, you may set rules using AWS Identity and Access Management (IAM) users and roles to manage permissions and regulate access to your pictures.

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AWS Fargate Interview Questions and Answers

Ques. 6): Does Amazon ECR support any particular version of the Docker Image Manifest specification?

Answer:

The Docker Image Manifest V2, Schema 2 format is supported by Amazon ECR. Amazon ECR will continue to accept photos uploaded in the Schema 1 format to guarantee backwards compatibility with Schema 1 images. Additionally, when pulling with an older version of Docker Engine, Amazon ECR may down-translate from a Schema 2 to a Schema 1 image (1.9 and below).

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Ques. 7): Do Amazon ECR and Amazon ECS integrate well?

Answer:

Yes. Because Amazon ECR and Amazon ECS are connected, it's simple to store, execute, and manage container images for applications that use Amazon ECS. Amazon ECS will obtain the relevant images for your apps if you just provide the Amazon ECR repository in your task specification.

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Ques. 8): How do I pull a public image from Amazon ECR?

Answer:

You pull using the familiar ‘docker pull’ command with the URL of the image. You can easily search for this URL by finding images using a publisher alias, image name, or image description using the Amazon ECR public gallery. Image URLs are in the format public.ecr.aws/<alias>/<image>:<tag>, for example public.ecr.aws/eks/aws-alb-ingress-controller:v1.1.5

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Ques. 9): Does Amazon ECR check the security of container images?

Answer:

Your container images may be automatically scanned by Amazon ECR for a variety of operating system flaws. Additionally, you may scan photos by issuing an API call. When a scan is finished, Amazon ECR will alert you through API and on the console. You may activate Amazon Inspector for improved picture scanning.

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Ques. 10): Can public container images be hosted by Amazon ECR?

Answer:

Yes. You may publish or look for public container software with ease using the widely accessible container registry and website provided by Amazon ECR. Anyone with or without an AWS account may search and download frequently used container images, such as operating systems, AWS published images, and files, such as Helm charts for Kubernetes, from the Amazon ECR public gallery.

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Ques. 11): Can I create my own alias for my publicly visible images?

Answer:

Yes. Unless it's a reserved alias, you can request a bespoke alias such as your company or project name. Reserved names apply to AWS services. It's also possible to reserve names that identify AWS Marketplace vendors. Unless your request for a custom alias breaches the AWS Acceptable Use Policy or other AWS standards, we will examine and accept it within a few days.

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Ques. 12): What is AWS Identity and Access Management (IAM) and how can I use it for permissions?

Answer:

You can regulate and track who and what (such as EC2 instances) may access your container images, as well as how, when, and where they can do so, using IAM resource-based controls. To begin, define resource-based policies for your repositories using the AWS Management Console. The Amazon ECR CLI also allows you to utilise example rules and add them to your repositories.

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Ques. 13): The Open Container Initiative (OCI) format is supported by Amazon ECR?

Answer:

Yes. The Open Container Initiative (OCI) image specification is compatible with Amazon ECR, enabling you to push and pull OCI images and artefacts. On pull, OCI images, Schema 2 images, and Docker Image Manifest V2 images may all be translated via Amazon ECR.

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Ques. 14): What distinguishes public and private Amazon ECR repositories?

Answer:

Images cannot be fetched from a private repository because it lacks content search functionality and requires Amazon IAM-based verification using an AWS account. Anyone anywhere may extract photos from a public repository that provides descriptive information without the requirement for an AWS account or IAM credentials. The Amazon ECR public gallery also has photographs from the public repository.

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Ques. 15): How can I use Amazon ECR to publicly post an image?

Answer:

By logging into your AWS account and pushing to a public repository you establish, you may publish a picture to the Amazon ECR public gallery. All public photographs that you publish are given a special alias that you must use in image URLs.

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Ques. 16): Which compliance features are available on Amazon ECR?

Answer:

To give a history of all API operations, including who grabbed an image and when tags were transferred across pictures, you may use AWS CloudTrail on Amazon ECR. The EC2 instances that retrieved which photos are also visible to administrators.

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Ques. 17): Does federated access work with Amazon ECR?

Answer:

Yes. AWS Identity and Access Management (IAM), which allows identity federation for delegated access to the AWS Management Console or AWS APIs, is connected with Amazon ECR.

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Ques. 18): Can I use a VPC to access Amazon ECR?

Answer:

Yes. Instances may access pictures from your private repository without using the public internet by using AWS PrivateLink endpoints.

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Ques. 19): Do Amazon ECR images duplicate between AWS Regions?

Answer:

Yes. With Amazon ECR, you have freedom in where and how you store and distribute your photos. You may establish deployment pipelines that develop images and upload them to Amazon ECR in one Region. Amazon ECR will then duplicate those images automatically to other Regions and set up deployment to multi-Region clusters.

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Ques. 20): Will Amazon ECR generate images from a Dockerfile automatically?

Answer:

No. To give this capacity, Amazon ECR, however, connects with a variety of well-liked CI/CD programmes.

Top 20 AWS ElastiCache Interview Questions and Answers

Web services like Amazon ElastiCache make it simple to set up and manage Memcached or Redis protocol-compliant server nodes in the cloud. With Amazon ElastiCache, you may get data from a quick, controlled, in-memory system rather than only relying on slower disk-based databases, which increases the speed of web applications. Your engineering resources may concentrate on creating applications as a result of the service's simplification and offloading of in-memory environment administration, monitoring, and operation. You may use Amazon ElastiCache to decrease the cost of scaling online applications while also enhancing load and response times to user actions and queries.

AWS(Amazon Web Services) Interview Questions and Answers

AWS Cloud Interview Questions and Answers

Ques: 1). What is Amazon ElastiCache?

Answer:

Common administrative activities needed to run a distributed in-memory key-value environment are automated by Amazon ElastiCache. With a few clicks on the AWS Management Console, you can quickly add a caching or in-memory layer using Amazon ElastiCache to your application design. A robust solution that reduces the danger of overcrowded databases, which degrade website and application load times, is provided by Amazon ElastiCache after a cluster is established. This technology automatically identifies and replaces failing nodes. The integration of Amazon ElastiCache with Amazon CloudWatch monitoring improves insight into the crucial performance indicators related to your nodes. Because Memcached and Redis are protocol-compliant, you may use the same code, programmes, and well-known tools you already use with your current Memcached or Redis installations with Amazon ElastiCache. With Amazon ElastiCache's support for clustered configuration, you can take advantage of a managed service that is quick, scalable, and simple to use while still being able to handle the demands of your most demanding applications. There are no upfront costs involved, and you just pay for the resources you use, like with other Amazon Web Services.

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Ques: 2). What are the nodes, shards, and clusters of Amazon ElastiCache?

Answer:

The smallest component of an Amazon ElastiCache setup is a node. It is a fixed-size portion of safely connected network RAM. Each node has its own DNS name, port, and instance of the Memcached or Redis protocol-compliant service. There are several different types of supported nodes, each with a different amount of memory. A Redis shard is a portion of the cluster's keyspace, which may consist of a primary node and 0–n read replicas.

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Ques: 3). What is handled on my behalf by Amazon ElastiCache?

Answer:

The setup of a distributed in-memory environment is handled by Amazon ElastiCache, which also handles the provisioning of the server resources and software installation. The solution automates routine administrative chores like failure detection and recovery and software patching once your environment is operational. You may rapidly identify problems by using the precise monitoring metrics that Amazon ElastiCache offers for your nodes. For instance, if one of your nodes becomes overwhelmed with requests, you may set up thresholds and get alarms.

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Ques: 4). Amazon ElastiCache Reserved Nodes: What are they?

Answer:

When you commit to a one-year or three-year term, reserved nodes or reserved instances (RI) provide you a considerable discount over on-demand use. With Reserved Nodes, you may make a one-time, upfront payment to create a one- or three-year reservation to run your node in a certain Region and save a lot of money compared to the regular hourly usage fee. You may balance the upfront payment with your hourly rate by choosing one of three Reserved Node types: All Upfront, No Upfront, or Partial Upfront.

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Ques: 5). A maintenance window is what? My nodes will be accessible during software maintenance, right?

Answer:

You might consider the Amazon ElastiCache maintenance window as a chance to decide when software patches are applied, should that be requested or necessary. If a "maintenance" event is planned for a specific week, it will start and end at the designated 60-minute maintenance window.

If software patching is planned during your maintenance window, your nodes can experience some outage. For further information, please see Engine Version Management. Patching may be requested by the user, such as when upgrading the cache software, or it may be deemed necessary (if we identify any security vulnerabilities in the system or caching software). Software patches should seldom take up more than a small portion of your maintenance window as they are applied infrequently (usually once every few months). A default value of 60 minutes is applied if you do not provide a desired weekly maintenance window when configuring your Cluster. By updating your DB Instance in the AWS Management Console or by using the ModifyCacheCluster API, you may change when maintenance is carried out on your behalf. If you like, each of your Clusters may have a distinct preferred maintenance window.

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Ques: 6). Why do I need a subnet group and what does it accomplish?

Answer:

For your Amazon ElastiCache Cluster in a VPC, you must specify a Subnet Group, which is a group of subnets. With the help of the Amazon ElastiCache Console, a Subnet Group is formed. There should be at least one subnet in each subnet group. The Subnet Group is used by Amazon ElastiCache to choose a subnet. The Node Endpoints are next connected to the IP Addresses from the chosen subnet. In addition, nodes with the aforementioned IP addresses are connected to via Elastic Network Interfaces that Amazon ElastiCache builds.

Because the underlying IP addresses for your nodes might vary, Amazon highly advises using the DNS Names to connect to them (e.g., after cache node replacement).

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Ques: 7). When does the contract for a Reserved Node start if I sign up for one? What occurs to my node at the conclusion of the term?

Answer:

When your request is accepted, the pricing adjustments related to a Reserved Node are triggered while the payment authorization is being handled. On the AWS Account Activity page or by using the DescribeReservedCacheNodes API, you may monitor the progress of your reservation. The discounted pricing will not apply if the one-time payment cannot be authorised by the end of the subsequent billing cycle.

Your Reserved Node will go back to the appropriate On-Demand hourly use charge for your node class and location after your reservation period expires.

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Ques: 8). How do I pick my Cluster's configuration settings correctly?

Answer:

By default, Amazon ElastiCache selects the cluster's ideal configuration settings based on the Node Type's memory and compute resource availability. However, you can modify them if necessary by utilising our configuration management APIs. Please be aware that altering configuration settings from suggested values might result in unanticipated consequences such as performance degradation or system failures and should only be done by experienced users who are willing to take these risks.

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Ques: 9). Today, I employ Memcached. Why should I switch to Amazon ElastiCache?

Answer:

Memcached and Amazon ElastiCache both adhere to the same protocol. As a result, you may utilise common Memcached operations like get, set, incr, and decr precisely as you would in your current Memcached installations. The text and binary protocols may both be used with Amazon ElastiCache. Additionally, it supports the most of the common statistic results, which are also available via CloudWatch as graphs. Because the libraries you use will still function, you may switch to utilising Amazon ElastiCache without recompiling or re-linking your apps. You only need to edit your application's Memcached configuration file to include the endpoints of the servers (nodes) we supply for you in order to setup the cache servers your application visits. To retrieve a list of the endpoints, you can just use the "DescribeCacheClusters" API or the "Copy Node Endpoints" option on the AWS Management Console. Before completing the switchover from your current solution, Amazon advises extensive testing of your new Amazon ElastiCache setup, as with any migration procedure.

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Ques: 10). A cluster may potentially cover more than one Availability Zone, is it true?

Answer:

Yes. You can select the availability zones for the new nodes while building a cluster or adding nodes to an existing cluster. Either choose "spread nodes across zones" or enter the desired number of nodes in each availability zone. Nodes can only be deployed in availability zones that are a part of the chosen cache subnet group if the cluster is in a VPC.

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Ques: 11). How do other Amazon Web Services and Amazon ElastiCache interact?

Answer:

As a front-end for Amazon Web Services like Amazon RDS and Amazon DynamoDB, Amazon ElastiCache is perfectly suited since it offers exceptionally low latency for high speed applications and offloads some of the request traffic while these services guarantee long-lasting data durability. Along with Amazon EC2 and EMR, the service may also be leveraged to enhance application performance.

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Ques: 12). What are the steps for utilising Auto Discovery?

Answer:

Click the "Download ElastiCache Cluster Client" link on the Amazon ElastiCache interface to begin downloading the Amazon ElastiCache Cluster Client. You need an Amazon ElastiCache account before you can download; if you don't currently have one, you may create one from the Amazon ElastiCache information page. By going to the Amazon ElastiCache console after downloading the client, you can start configuring and activating your Amazon ElastiCache cluster.

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Ques: 13). How can I tell my cluster to run the supported version of Memcached?

Answer:

When constructing a new cluster, you can choose any minor or major version that is currently supported. Using the "Modify" option for your cluster, you can start an upgrade to a supported engine version release. Simply enter the desired version into the "Cache Engine Version" column. If the "Applied Immediately" option is selected, the update will then be carried out on your behalf either right away or during the subsequent cluster maintenance session.

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Ques: 14). How can in-memory caching benefit my applications?

Answer:

With the help of Amazon ElastiCache's in-memory caching, many read-heavy application workloads (including social networking, gaming, media sharing, and Q&A portals) or compute-intensive workloads can experience a considerable reduction in latency and throughput (such as a recommendation engine). By keeping important data in memory for quick access, in-memory caching enhances application performance. The outcomes of computation- or I/O-intensive calculations as well as the results of database queries may both be included in cached data.

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Ques: 15). How can I build a cluster?

Answer:

Using the AWS Management Console, Amazon ElastiCache APIs, or Command Line Tools, cluster creation is straightforward. Click the "Create" button in the "Memcached" or "Redis" tab of the AWS Management Console to start a cluster. To build a cluster with the required amount of RAM, you only need to give your Cluster Identifier, Node Type, and Number of Nodes. As an alternative, you may build your cluster using the elasticache-create-cache-cluster command or the CreateCacheCluster API. When you create a cluster, AWS will automatically deploy it in an Availability Zone depending on your memory needs and available capacity if you do not select one.

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Ques: 16). When utilising VPC is not an option, How does the Cache Security Groups in Amazon ElastiCache let you manage access to your clusters?

Answer:

A Security Group controls network access to your cluster similarly to a firewall. Your clusters' network access is disabled by default. You must explicitly permit access from hosts in particular EC2 security groups if you want your apps to be able to access your cluster. Ingress is the name of this procedure.

Create a Security Group and link it to the required EC2 security groups (which in turn define the EC2 instances authorised) to grant network access to your cluster. When creating your cluster, the Security Group can be linked to it, or you can do it later by selecting "Modify" from the AWS Management Console.

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Ques: 17). With Amazon ElastiCache for Memcached, what can I cache?

Answer:

Using the service, you can cache a wide range of objects, including transient session data that might not need a persistent backing store, dynamically generated web pages (using, for instance, Nginx), and content in persistent data stores (like Amazon RDS, DynamoDB, or self-managed databases hosted on EC2). Additionally, you may use it to install admission control in high traffic online applications by implementing high-frequency counters.

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Ques: 18). How do I control network access to my cluster?

Answer:

In non-VPC installations, Amazon ElastiCache enables you to manage access to your cluster and, therefore, the nodes, using Security Groups. A Security Group controls network access to your node similarly to a firewall. Your nodes' network access is disabled by default. You may configure your Security Group to permit access from EC2 Instances with a certain EC2 Security Group membership or IP ranges if you want your apps to have access to your node. Ingress is the name of this procedure. All nodes included in a Security Group must abide by the same rules once ingress has been set for that Security Group. The "Security Groups" section of the Amazon ElastiCache Console or the Amazon ElastiCache APIs may be used to configure security groups.

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Ques: 19). How will I be charged and billed for my use of Amazon ElastiCache?

Answer:

There is no minimum charge; you simply pay for what you really use. For each Node Type, pricing is based on utilised Node-hours. Node-hours that are utilised in part are invoiced as full hours. Within the same Availability Zone, there are no fees associated with data transmission between Amazon EC2 and Amazon ElastiCache. You are only billed for data transfers into or out of the Amazon EC2 instance, even if regular Amazon EC2 Regional Data Transfer fees apply when moving data between an Amazon EC2 instance and an Amazon ElastiCache Node in different Availability Zones of the same Region. For traffic entering or leaving the Amazon ElastiCache Node itself, there is no Amazon ElastiCache Data Transfer fee. For data transported outside of an area, standard data transfer rates apply.

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Ques: 20). Which well-known Memcached libraries work with Amazon ElastiCache?

Answer:

LibMemcached (C) and libraries based on it (e.g. PHP, Perl, Python), spyMemcached (Java), and fauna are some examples of existing Memcached client libraries that function with Amazon ElastiCache without the need to recompile or re-link applications (Memcached 1.4.5 and later) (Ruby).

November 14, 2022

Top 20 AWS Lightsail Questions and Answers

For developers, small enterprises, students, and other customers that want a solution to create and run their applications in the cloud, Amazon Lightsail is a virtual private server (VPS) provider and the simplest method to get started with AWS. Developers may install and manage websites and web applications in the cloud using Lightsail's computing, storage, and networking capability. For a cheap, dependable monthly cost, Lightsail offers everything you need to swiftly begin your project, such as virtual machines, containers, databases, CDN, load balancers, DNS management, etc.

AWS(Amazon Web Services) Interview Questions and Answers

AWS Cloud Interview Questions and Answers

Ques. 1): How effective are Lightsail instances?

Answer:

AWS particularly designed Lightsail instances for usage with web servers, developer environments, and tiny databases. Such tasks occasionally require a performance burst but do not frequently or routinely demand the entire CPU. Burstable performance instances, which Lightsail employs, offer a basic amount of CPU performance with the option to burst over it. This approach protects you from the inconsistent performance or other frequent negative effects that you may normally see from over-subscription in other situations while enabling you to obtain the performance you need, when you need it.

Use Amazon EC2 if you want highly customizable settings and instances with consistently good CPU performance for applications like video transcoding or HPC workloads.

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Ques. 2): How do DNS records work?

Answer:

DNS is a widely used service that converts domain names like www.example.com into the numerical IP addresses used by computers to communicate to one another, such as 192.0.2.1. You may quickly link the public IPs of your Lightsail instances to your registered domain names, such as photos.example.com. In this way, Lightsail automatically converts human readable names like example.com that people put into their browsers into the IP of the instance you wish to send them to. These translations are all referred to as DNS queries.

It's crucial to understand that you must register a domain in Lightsail before using it. You can register new domains using Amazon Route 53, or your preferred DNS registrar.

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Ques. 3): What can I do in Lightsail using tags?

Answer:

With tags, you can categorise and filter your resources in the Lightsail interface and API, keep track of and arrange your charges in your bill, and set access management rules to control who may see or alter your resources. With the use of tags, you can:

Organize - View and manage resources based on the tags you've given them using the Lightsail interface and API filters. This is helpful if you have a lot of resources of the same type since you can easily recognise a particular resource based on the tags you've given it.

Cost-allocate - By identifying your resources and setting "cost allocation tags" in the billing interface, you may track and distribute expenses across various projects or users. You may, for instance, break out your bill and analyse your expenditures by client or project.

Using AWS Identity and Access Management rules, you can manage access and limit who may create, update, and remove Lightsail resources. You can work more effectively with people on projects without having to grant them complete access to your Lightsail resources thanks to this.

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Ques. 4): A Lightsail instance is what?

Answer:

A Lightsail instance is an AWS Cloud-based virtual private server (VPS). Utilize your Lightsail instances to run code, store data, and create webpages or web apps. Both public (Internet) and private (VPC) networking options are available for your instances to use when connecting to one another and to other AWS services. From the Lightsail console, you can simply create, manage, and connect to instances.

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Ques. 5): What are photographs?

Answer:

Point-in-time backups of instances, databases, or block storage devices are known as snapshots. You may take a snapshot of your resources at any moment, or you can instruct Lightsail to take snapshots for you by turning on automatic snapshots for instances and discs. Snapshots can be used as starting points for building new resources or when backing up data. All the information required to recover your resource is in a snapshot (from the moment when the snapshot was taken). The rebuilt resource starts out as an identical clone of the old resource that was used to construct the snapshot when you restore a resource by building it from a snapshot.

You can manually take snapshots of your Lightsail instances, disks, and databases, or you can use automatic snapshots to instruct Lightsail to take daily snapshots of your instances and disks automatically.

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Ques. 6): Where can I find a Lightsail instance?

Answer:

With SSH access for Linux/Unix-based instances and RDP access for Windows-based instances, Lightsail provides a 1-click secure connection to your instance's terminal straight from your browser. Launch your instance control panels, select Connect using SSH or Connect using RDP, and a new browser window will open with your instance already connected. This is known as 1-click connections.

Lightsail will handle the saving and administration of your SSH keys for you and give you a safe key to use in your SSH client if you wish to connect to your Linux/Unix-based instance using your own client.

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Ques. 7): A Lightsail instance plan: what is it?

Answer:

A Lightsail package, also known as a bundle, contains an SSD-based virtual private server, SSD-based storage, and a data transfer allowance. The virtual private server has a defined quantity of RAM and vCPUs. Additionally, the Lightsail plans provide DNS control and five static IP addresses per account (3 domain zones per account). Plans with Lightsail are only paid for when you use them because they are hourly, on-demand fees.

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Ques. 8): What are the maintained databases at Lightsail?

Answer:

The managed databases offered by Lightsail are instances that are solely used to operate databases rather than other workloads like web servers, mail servers, etc. The same tools and programmes you use to access a stand-alone database may also be used to access a Lightsail database, which can contain many user-created databases. Lightsail keeps your database's operating system and underlying infrastructure safe and secure so that you may administer a database without having a strong background in infrastructure management. Lightsail databases have a defined amount of memory, processing power, and SSD-based storage that you can scale up over time, much like standard Lightsail instances. Your selected database will be installed and configured for you by Lightsail immediately after it is created.

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Ques. 9): What can I do with the block storage in Lightsail?

Answer:

Similar to an individual hard drive, Lightsail block storage offers extra storage volumes (referred to as "connected discs" in Lightsail) that you may attach to your Lightsail instance. Applications and software that need to split off specialised data from their core services can benefit from attached discs. They can also be used to preserve application data in the event that your instance and system disc experience a failure or other problem. Applications or software that often access their stored data might benefit from the constant performance and reduced latency provided by attached drives.

Solid-state discs are used in Lightsail block storage (SSD). This kind of block storage aims to handle the great majority of Lightsail workloads by balancing affordability and performance. Adopt EC2 with GP2 or Provisioned IOPS SSD storage in place of Lightsail for clients whose applications need consistent IOPS performance, high throughput per disc, or are running sizable databases like MongoDB, Cassandra, etc.

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Ques. 10): What distinguishes halting from deleting my instance?

Answer:

Your instance is shut down when you stop it, but it is still switched on and ready for you to restart it whenever you choose. It is advised to use static IPs for instances that must maintain the same IP after they cease since stopping your instance would relinquish its public IP.

Your instance will be deleted, which is a detrimental operation. Your instance data will all be lost and unrecoverable unless you have taken an instance snapshot. Both the instance's public and private IP addresses will be made public. If you were utilising a static IP with that instance, it stays in your account but is detachable.

AWS Solution Architect Interview Questions and Answers

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Ques. 11): What aspects of my managed database does Lightsail handle for me?

Answer:

Your database's core architecture and a variety of maintenance tasks are managed by Lightsail. To assist prevent data loss or component failure, Lightsail automatically backs up your database and offers point-in-time recovery using the database restore tool for the last seven days. Additionally, Lightsail automatically encrypts your data while it is in transit and at rest for improved protection. It also saves your database password for quick and safe database connections. On the maintenance front, Lightsail performs database maintenance within the designated maintenance time. The administration of the operating system and underlying infrastructure, as well as automated updates to the most recent minor database version, are all included in this maintenance.

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Ques. 12): In Lightsail, how do I utilise IPs?

Answer:

An automated private IP address and a public IP address are assigned to each Lightsail instance. The private IP can be used to send data secretly and without cost between Lightsail instances and AWS services. You may connect to your instance from the Internet using the public IP, for example, by using a registered domain name or an SSH or RDP connection from a local computer. The public IP may be replaced with a static IP address by adding a static IP to the instance, which will remain the same even if you stop and restart the instance.

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Ques. 13): Does Amazon Lightsail offer alerting and monitoring capabilities?

Answer:

Yes. You may get statistics on a variety of resources, such as databases, load balancers, and instances, using Amazon Lightsail. You can set up a maximum of two alert thresholds for each statistic for every given resource. If the alert threshold is crossed, you will be notified via the Lightsail console and, if you so desire, you will also receive an email and/or SMS. The warning and monitoring functionality of Lightsail is free; however, your cell carrier may impose SMS message fees.

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Ques. 14): What is Lightsail good for?

Answer:

You may select from a number of preconfigured VPS plans that come with everything you want for simple application deployment and management. Lightsail is best suited for customers that want a straightforward administration interface and projects that call for a few virtual private servers. Running websites, web apps, blogs, e-commerce sites, basic software, and more are examples of common use cases for Lightsail.

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Ques. 15): When I remove my managed database, what happens to my data?

Answer:

Your database itself and its automated backups will be destroyed if you delete your managed database. This information cannot be recovered unless you manually snapshot your database before deleting it. Lightsail offers a one-click option to take a manual snapshot during the deletion of your database, if requested, to assist prevent unintentional data loss. Although it is optional, manually taking a picture before deletion is strongly advised. When you no longer require the recorded data, you can erase your manual snapshot.

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Ques. 16): How can I use the distributions from the Lightsail CDN?

Answer:

By storing and providing the material on Amazon's worldwide delivery network, which is powered by Amazon CloudFront, Lightsail content delivery network (CDN) distributions make it simple for you to expedite the delivery of content housed on your Lightsail resources. By offering quick SSL certificate generation and hosting, distributions also assist you in making your website HTTPS-compatible. Distributions can also assist your website endure significant traffic surges and lessen the strain on your Lightsail resources. Like all of Lightsail's capabilities, setup only requires a few clicks, and the cost is a straightforward monthly fee.

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Ques. 17): What settings do I need to make so that my apex domain points to my Lightsail distribution?

Answer:

You must make an ALIAS record in your domain's domain name system (DNS) that translates your apex domain to your distribution's default domain in order to direct your apex domain to your CDN distribution. If your DNS hosting provider does not allow ALIAS records, you may easily arrange your apex domain to refer to the domain of your distribution by using Lightsail DNS zones.

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Ques. 18): What can I do with the container services from Lightsail?

Answer:

Running containerized apps in the cloud is made simple by Lightsail container services. Simple web apps and multi-tiered micro services are both capable of running on a container service. You just need to supply the container image, scalability (number of nodes), and power (CPU, RAM) needed for your container service. Without you needing to handle any underlying infrastructure, Lightsail manages the container service. You will be given a load-balanced TLS endpoint by Lightsail to access the application that is being used by the container service.

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Ques. 19): What kind of usage does Lightsail CDN encourage?

Answer:

Amazon To make the cost of utilising the service straightforward and predictable, Lightsail CDN distributions are built using fixed-priced bundles of data transport. A month's worth of consumption is covered by a distribution package. Distribution bundles may not be used for purposes other than those for which they were designed, such as repeatedly upgrading or downgrading bundles or employing an abnormally high volume of distributions from a single origin. Workloads that need a lot of requests per second or a lot of streaming video are also not allowed. Your data services or account may be throttled or suspended if you engage in these actions.

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Ques. 20): What's the difference between removing my container service and halting it?

Answer:

Your container nodes are in a disabled state when you disable your container service, and the public endpoint of the service returns an HTTP status code of '503'. The service returns to the most recent active deployment when it is enabled. Configurations for power and scalability are also kept. Following re-enabling, the public endpoint's name remains unchanged. Container images and deployment history are kept.

You are acting destructively when you remove your container service. All of the service's container nodes will be permanently destroyed. Additionally, your service's container images, deployment history, logs, and HTTPS public endpoint address will all be permanently erased. It is impossible for you to get the endpoint address back.

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