Top AWS CodeBuild Interview Questions and Answers

AWS A cloud-based continuous integration solution called CodeBuild is fully managed. CodeBuild compiles source code, runs tests, and creates deployable packages. You no longer need to set up, oversee, and scale up your own build servers thanks to CodeBuild. Your builds won't have to wait in line since CodeBuild scales up and down automatically and handles several builds at once. Use CodeBuild's prefabricated build environments to get going immediately, or create your own build environments to use your own build tools. You just pay by the minute with CodeBuild.

Ques. 1): What is a build project?

Answer:

To specify how CodeBuild will conduct a build, create a build project. It explains things like how to obtain the source code, how to use a build environment, what commands to run throughout the build process, and where to put the build output. An operating system, a runtime for a programming language, and the tools needed by CodeBuild to do a build are together referred to as a build environment.

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Ques. 2): Which Windows build runtimes does CodeBuild offer preconfigured?

Answer:

For .NET Core 2.0, CodeBuild offers a predefined Windows build environment. For Microsoft.NET Framework users, many of whom already have a licence to use the company's proprietary libraries, we would like to offer a preset build environment. Microsoft, however, has so far shown little interest in cooperating with us to fulfil these customer requests. By building a Docker image and submitting it to the Amazon EC2 Container Registry or the Docker Hub registry, you can modify your environment on your own to support additional build targets, such as the.NET Framework. This custom image can then be referred to in your build project.

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Ques. 3): How can I trace a failed build from the past?

Answer:

You can check the thorough logs produced throughout the build cycle to troubleshoot a build, or you can utilise CodeBuild Local to test and troubleshoot your builds locally.

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Ques. 4): How can CodeBuild distinguish between builds for different clients?

Answer:

CodeBuild executes your build in separate, brand-new environments free from other users, and it discards each environment after the build is finished. At both the infrastructure and execution levels, CodeBuild offers security and separation.

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Ques. 5): Why need I to utilise CodeBuild?

Answer:

Use CodeBuild's fully managed experience to avoid having to install, patch, and maintain the build server software yourself. Your build jobs are submitted to CodeBuild, which executes them in temporary compute containers that are freshly constructed with each build and then eliminated after use. You are not required to manage or create server software or hardware. Also, CodeBuild scales itself to accommodate your build volume. Each build you submit is promptly processed, and because it supports running several builds simultaneously, your builds are never held up in a queue.

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Ques. 6): What occurs when a build is executed?

Answer:

A temporary compute container of the class defined in the build project will be created by CodeBuild, which will then load it with the specified runtime environment, download the source code, run the commands configured in the project, upload the generated artefact to an S3 bucket, and then destroy the compute container. CodeBuild will send the build output to the service console and Amazon CloudWatch throughout the build.

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Ques. 7): How can I look at previous build outcomes?

Answer:

Your previous build results are accessible via the console, CloudWatch, or API. The outcomes include build duration, output artefact location, success or failure, and log location. You can monitor metrics to comprehend build behaviour over time with the CodeBuild dashboard. The dashboard shows the total number of builds that have been tried, completed, and failed.

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Ques. 8): How can I get notified or alerted when something happens in AWS CodeBuild?

Answer:

For occurrences that have an effect on your build projects, you can generate notifications. Amazon SNS notifications will be used for notifications. Each notification will have a link to the resources whose event caused it, along with a status message. There is no additional price for notifications, but you can be charged for other AWS services that notifications uses, including Amazon SNS. Consult the alerts user guide to understand how to get started. Customers can also set up notifications to go to their Slack channels or Amazon Chime chat rooms when utilising the AWS Chatbot.

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Ques. 9): Can I automate my release process with CodeBuild?

Answer:

Yes. AWS CodePipeline and CodeBuild have been connected. You can add a build action and set up a cloud-based continuous integration and delivery workflow. Through the CodePipeline console, you can learn how to configure and keep an eye on your builds.

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Ques. 10): Can CodeBuild be used with Jenkins?

Answer:

Yes. Jenkins jobs can incorporate CodeBuild using the CodeBuild Plugin for Jenkins. By sending the build jobs to CodeBuild, provisioning and managing the Jenkins worker nodes is no longer necessary.

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Ques. 11): Can I manage access to CodeBuild using Amazon Identity and Access Management (IAM)?

Answer:

Yes. With resource-level rights in IAM policies, you can restrict who has access to your build projects.

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Ques. 12): How should a construction project be configured?

Answer:

Configuring a build project can be done via the console or AWS CLI. You define the source repository's location, the build instructions, the runtime environment, the IAM role that the container will assume, and the compute class needed to execute the build. With a buildspec.yml file, you can optionally define the build commands.

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Ques. 13): Which coding frameworks is CodeBuild compatible with?

Answer:

For supported versions of Java, Ruby, Python, Go, Node.js, Android,.NET Core, PHP, and Docker, CodeBuild offers preset environments. By building a Docker image and submitting it to the Docker Hub registry or the Amazon EC2 Container Registry, you can also modify your own environment. This custom image can then be referred to in your build project.

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Ques. 14): Why are the.NET Core for Windows build environments unable to support build.general1.small?

Answer:

The build does not have enough memory or processing capacity to support the.NET Core for Windows build environment. due to the size of the Windows Docker base container and additional libraries, general1.small compute instance type. There is no free tier for the.NET Core for Windows build environment as a result of this restriction.

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Ques. 15): Does CodeBuild support any particular source repositories?

Answer:

To pull source code for builds, CodeBuild may connect to AWS CodeCommit, S3, GitHub, GitHub Enterprise, and Bitbucket.

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Ques. 16): How do I configure my initial build?

Answer:

Create a build project, log in to the Amazon Management Console, and then execute a build. See Getting Started, which contains a step-by-step tutorial, for an introduction to CodeBuild. To test and troubleshoot your build locally, use CodeBuild Local.

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Ques. 17): Can I encrypt the build artifacts stored by CodeBuild?

Answer:

Yes. Your artefacts can be encrypted using a key that is kept in the Amazon Key Management Service (AWS KMS).

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Top 20 AWS EventBridge Interview Questions and Answers

Without having to write any code, Amazon EventBridge offers real-time access to data changes in AWS services, your own applications, and software as a service (SaaS) applications. AWS Lambda, Amazon Simple Notification Service (SNS), and Amazon Kinesis Data Firehose are just a few of the AWS services you can choose from as targets once you've chosen an event source on the Amazon EventBridge panel. The events will be automatically delivered via Amazon EventBridge in close to real-time.

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Ques. 1): What are the steps for using Amazon EventBridge?

Answer:

Choose an event source from a list of partner SaaS applications and AWS services by logging into your AWS account, going to the Amazon EventBridge dashboard, and selecting that source. Make sure your SaaS account is set up to emit events if you're using a partner application, then accept the source in the provided event sources section of the Amazon EventBridge console. Your event bus will be immediately created by Amazon EventBridge and used to route events. As an alternative, you can instrument your application with the AWS SDK to begin broadcasting events to your event bus. Add a target for your events and optionally configure a filtering rule; the target may be a Lambda function, for instance. The events will be automatically ingested, filtered, and sent to the specified target in a secure and highly available manner by Amazon EventBridge.

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Ques. 2): EventBridge API Destinations: What are they?

Answer:

Developers may regulate throughput and authentication while sending events back to any on-premises or SaaS apps using API Destinations. EventBridge will handle security and delivery while customers set rules with input transformations that transfer the event format to the format of the receiving service. When a rule is activated, Amazon EventBridge transforms the event in accordance with the parameters supplied and sends it to the defined web service along with the authentication data specified when the rule was created. Developers no longer have to create authentication components for the service they wish to utilise because security is already built in.

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Ques. 3): How are CloudWatch Events related to Amazon EventBridge?

Answer:

CloudWatch Events are improved and expanded upon by Amazon EventBridge. It makes use of the same service API, endpoint, and underpinning infrastructure. Nothing has changed for current CloudWatch Events users; you can continue to utilise the same API, CloudFormation templates, and console. Customers told us that CloudWatch Events is the best service for creating event-driven architectures, so we created new features to let customers link data from their own SaaS apps and those of other companies. We have launched this feature under the moniker Amazon EventBridge rather than under the CloudWatch service to reflect its extension outside the monitoring use case for which it was designed.

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Ques. 4): Which AWS services are included with Amazon EventBridge as event sources?

Answer:

Over 90 AWS services, including AWS Lambda, Amazon Kinesis, AWS Fargate, and Amazon Simple Storage Service, are available as event sources for EventBridge (S3).

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Ques. 5): How do I filter which events are delivered to a target?

Answer:

You can filter events with rules. A rule matches incoming events for a given event bus and routes them to targets for processing. A single rule can route to multiple targets, all of which are processed in parallel. Rules allow different application components to look for and process the events that are of interest to them. A rule can customize an event before it is sent to the target, by passing only certain parts or by overwriting it with a constant.

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Ques. 6): What does the feature of schema discovery do?

Answer:

The procedures for locating schemas and adding them to your registry are automated by schema discovery. Each event's schema is automatically uploaded to the registry when schema discovery is enabled for an EventBridge event bus. Schema discovery will instantly update the schema in the registry if the schema of an event changes. Once a schema has been uploaded to the registry, you can create a code binding for it either in the EventBridge console or directly in your IDE. This enables you to represent the event in your code as a strongly-typed object and utilise IDE features like validation and auto-complete.

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Ques. 7): The Serverless Application Model (AWS SAM) allows for the use of schema.

Answer:

Yes, you may build new serverless apps on EventBridge for any schema as an event type using the interactive mode of the most recent AWS SAM CLI. Simply select the "EventBridge Starter App" template and the event's schema, and AWS SAM will create an application with a Lambda function that is called by EventBridge and handling code for the event. This implies that you may utilise IDE tools like validation and auto-complete and treat an event trigger like a regular object in your code.

AWS Toolkit for Visual Studio Code and the AWS Toolkit for Jetbrains (Intellij, PyCharm, Webstorm, Rider) plugins both offer the ability to create serverless apps from this template with a schema acting as a trigger right inside of these IDEs.

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Ques. 8): How can writing less code using the schema registry benefit me?

Answer:

In order to avoid having to manage your event schema manually, you can first utilise schema discovery to automatically identify schema for any events transmitted to your EventBridge event bus and save them in the registry. Second, you can develop and download code bindings for this schema when creating apps that process events on your bus so that you can use strongly-typed objects right away. Deserialization, validation, and guesswork for your event handler are all avoided as a result.

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Ques. 9): How can I protect my use of Amazon EventBridge?

Answer:

You can define the actions that a user within your AWS account is permitted to take by integrating Amazon EventBridge with AWS Identity and Access Management (IAM). You could, for instance, set an IAM policy that allows only specific users in your company to add event targets or create event buses.

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Ques. 10): What justifies my use of global endpoints?

Answer:

By reducing the quantity of data at risk during service interruptions, global endpoints assist you in giving your end users a better experience. By being able to failover your event ingestion to a backup region automatically and without the need for manual intervention, you can increase the stability and resilience of your event-driven applications. To decide whether to failover and when to transport events back to the primary region, you can freely set failover criteria using CloudWatch Alarms (through Route53 health checks).

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Ques. 11): What are the Recovery Point Objective (RPO) and Expected Recovery Time Objective (RTO)?

Answer:

The Recovery Time Objective (RTO) is the period of time following a failure when the backup Region or target will begin to receive new events. The amount of data that will remain unprocessed in the event of a failure is measured by the Recovery Point Objective (RPO). The RTO and RPO for global endpoints will be 360 seconds provided you adhere to our prescriptive recommendations for alarm setting (with a maximum of 420). When calculating RTO, the time is taken into account for setting off CloudWatch Alarms and updating Route53 health check statuses. Events that are not copied to the secondary region and remain in the primary region until the service or region recovers are included in the RPO time.

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Ques. 12): EventBridge Archive and Replay Events: What Is It?

Answer:

Customers can reprocess previous events back to an event bus or a specific EventBridge rule using the new feature Event Replay for Amazon EventBridge. Developers can use this functionality to quickly debug their apps, extend them by hydrating targets with historical events, and fix mistakes. Developers may rest easy knowing that they will always have access to any event submitted to EventBridge thanks to Event Replay.

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Ques. 13): Why would I use Amazon EventBridge into my SaaS application?

Answer:

SaaS vendors can easily integrate their services with the event-driven architectures created by their clients and hosted on AWS thanks to Amazon EventBridge. Millions of AWS developers may now directly access your product thanks to Amazon EventBridge, opening up new applications. It provides an entirely safe, scalable, and auditable solution to convey events without requiring the SaaS vendor to handle any eventing infrastructure.

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Ques. 14): Does Amazon EventBridge allow me to publish my own events?

Answer:

Yes. Through the use of the service's APIs, you can create unique application-level events and publish them to Amazon EventBridge. Additionally, you can create scheduled events that are generated on a regular basis and process these events in any of the available targets for Amazon EventBridge.

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Ques. 15): What is the price of the schema registry?

Answer:

The schema registry is free to use, however when you enable schema discovery, there is a fee per ingested event. The majority of development consumption should be covered by the free tier of 5M ingested events offered by schema discovery each month. For usage above the free tier, there is an extra charge of $0.10 per million ingested events.

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Ques. 16): When should I make use of Amazon SNS and when of Amazon EventBridge?

Answer:

Your choice will depend on your particular requirements, but you may create event-driven apps using both Amazon EventBridge and Amazon SNS. When creating an application that responds to events from SaaS applications and/or AWS services, Amazon EventBridge is advised. The only event-based service that interacts directly with external SaaS providers is Amazon EventBridge. Without needing developers to create any resources in their account, Amazon EventBridge also automatically ingests events from over 90 AWS services. Over 15 AWS services, including Amazon Lambda, Amazon SQS, Amazon SNS, Amazon Kinesis Streams, and Kinesis Data Firehose, are presently supported as targets by Amazon EventBridge. With a limited throughput at launch that can be expanded upon request and an average latency of about half a second, Amazon EventBridge is currently in beta.

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Ques. 17): How should I failover my global endpoint? What metrics should I use?

Answer:

In order to make it simple for you to identify whether there are any difficulties with EventBridge that would necessitate you failovering your event ingestion to the secondary region, we have added a new measure that shows the end-to-end latency of Amazon EventBridge. By offering a pre-populated CloudFormation stack (that you may alter if you so desire) for setting a CloudWatch Alarm and Route53 Health Checks in the console, AWS has made it simple for you to get started.

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Ques. 18): Do I need to enable replication?

Answer:

Yes. To reduce the amount of data that is vulnerable during a service failure, replication should be enabled. You can update your applications to publish your events to the global endpoint after setting up your custom buses in both regions and making the global endpoint. By doing this, after the problem is resolved, your incoming events will be copied back to the primary area. To ensure that none of your events are lost in the event of a disruption, you can archive your events in the secondary region. You can replicate your design in the secondary zone to carry on processing events while you swiftly recover from disturbances. In order to assure automatic recovery once the problem has been resolved, you must additionally enable replication.

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Ques. 19): Should I failover my global endpoint using metrics from my subscriber?

Answer:

We don't advise integrating subscriber metrics in your health check because doing so can force your publisher to switch to the backup area if one subscriber has a problem even though all the others are fine in the primary region. You should enable replication if one of your subscribers in the primary region isn't processing events properly in order to make sure that your subscriber in the secondary region can.

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Ques. 20): How does a global endpoint increase my applications' availability?

Answer:

Events are routed to the event bus in your main area after they are published to the global endpoint. Your healthcheck is flagged as unhealthy and incoming events are directed to the secondary area if faults are found in the primary region. Using CloudWatch Alarms (through Route53 health checks) that you set, errors can be quickly found. As soon as the problem is resolved, AWS routes fresh events back to the original Region and get on with event processing.

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