Showing posts with label fargate. Show all posts
Showing posts with label fargate. Show all posts

December 17, 2022

Top 20 AWS Migration Evaluator Interview Questions and Answers

 


Ques. 1): What is supported by Migration Evaluator? What is not supported by Migration Evaluator?

Answer:

The x86 architecture of the server and the associated block storage of the customer are supported by Migration Evaluator. Based on the provisioning, software licencing, and use, the software discovers Amazon EC2 matches. Since it was not created to monitor or report on storage appliances, mainframes, or network devices like routers, Migration Evaluator currently does not allow modelling of Solaris, AIX, or other non-x86 systems.

 

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Ques. 2): Use of application dependency mapping is there in the solution?

Answer:

No, you can map application dependencies within AWS Migration Hub. The Migration Evaluation study will take into account application groups formed through the AWS Migration Hub.

 

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Ques. 3): Does the study allow for the usage of current Microsoft licences?

Answer:

Yes. To ensure that these savings—which may account for two thirds of the cloud costs for some applications—are captured, Migration Evaluator may represent "bring your own licence" in the business case if the customer already owns Microsoft SQL Server or Windows Server licences. To dedicated hosts, dedicated instances, or shared instances, the Migration Evaluator can model.


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Ques. 4): What if, after receiving Migration Evaluator Quick Insights, I still need more data insights?

Answer:

Simply request one, and your assigned Migrations Solution Architect will produce one based on your company's business objectives. Additional pricing models, an examination of the Microsoft SQL licence, or exports of the match findings are also included in the report.


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Ques. 5): Are agents necessary?

Answer:

No. Customers have the option of providing existing inventory and usage figures through flat-files, or using the agentless collector to automate on-premises data gathering. One Windows Server virtual machine must be deployed within the network of customers using the Migration Evaluator collection. WMI (for Hyper-V and Windows Server), SNMP, vSphere from VMware, and T-SQL are examples of common protocols. On the hypervisors or other servers belonging to the customer, no agents are installed.


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Ques. 6): Which AWS regions can model expenses using the Migration Evaluator Business Case report?

Answer:

With the exception of Mainland China, Migration Evaluator Business Case offers modelling to all public regions (Ningxia or Beijing).

 

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Ques. 7): Is the data protected?

Answer:

Yes. The information gathered by the collector is transferred via HTTPS to an encrypted Amazon S3 bucket provided by Migration Evaluator, where it is then re-encrypted using a customer-specific certificate. All uploaded files from tools already in use or files added to the collection are also kept in an encrypted Amazon S3 bucket. AES-256 Server-Side Encryption with AWS Key Management Service is used for all Amazon S3 buckets (SSE-KMS).


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Ques. 8): Where can I find Migration Evaluator?

Answer:

The Migration Evaluator is accessible everywhere. This indicates that you can get assistance from Migrations Solution Architects in North America, Europe, and Australia. Customer information is kept in US East (Northern Virginia).


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Ques. 9): How can partners ask for a Migration Evaluator on a client's behalf?

Answer:

Please make your request through the APN Portal for partners that want to use Migration Evaluator for a customer opportunity. Search for "Migration Evaluator" in our Submission Quick Guide to find instructions on how to request.

 

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Ques. 10): Can the solution show instances and VMs for each application separately?

Answer:

Yes. If the application categories are provided by tagging, naming conventions, or an export from an inventory management platform, the Migration Evaluator Business Case deliverable can display them. This data is used by Migration Evaluator to generate workload groups for each business function, such as application and environment groupings.

 

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Ques. 11): In Migration Evaluator Quick Insights, which charges are disclosed?

Answer:

Quick Insights displays the estimated costs of repurchasing Amazon EBS, Amazon EC2, and operating system licences from AWS over a one-year period with no up-front expenses.

 

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Ques. 12): Will the approach still be effective if only the virtualization stack is available?

Answer:

Yes. With information from VMware or Hyper-V, the Migration Evaluator can suggest matches between on-premises and AWS. Citrix XenServer is not supported by Migration Evaluator.

 

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Top 20 AWS SES Interview Questions and Answers

 

 

Ques. 1):  Support for Sender Policy Framework (SPF) is there in Amazon SES?

Answer:

Yes, SPF is supported by Amazon SES. Depending on the method you choose to deliver emails using Amazon SES, you might need to publish an SPF record. Because Amazon SES automatically distributes emails from an MAIL FROM domain that is held by Amazon Web Services, you do not need to publish an SPF record if you do not need to comply with Domain-based Message Authentication, Reporting and Conformance (DMARC) using SPF. You must configure Amazon SES to utilise your own MAIL FROM domain and publish an SPF record in order to comply with DMARC utilising SPF.

 

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Ques. 2): Is the maximum size of an email that Amazon SES can deliver?

Answer:

Email messages up to 40MB in size, including any included graphics and attachments, are supported using the Amazon SES v2 API and SMTP. When sending messages greater than 10MB, you may experience bandwidth throttling that reduces your sending speed to as little as 40MB/s. For instance, you may send two 20MB messages per second or one 40MB message at a pace of 1 message per second.

The Amazon SES API v1 can handle messages up to 10MB in size, including any images and attachments.

 

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Ques. 3): Can I send a certain number of emails each day?

Answer:

Sending restrictions apply to every Amazon SES account differently. These boundaries are:

The maximum number of people to whom you can send emails within a 24-hour period is known as the "sending quota."

The maximum send rate is the number of recipients you can email at once.

Sending restrictions are determined by recipients as opposed to messages. Utilizing the Amazon SES dashboard, you can check your sending restrictions whenever you want.

We reserve the right to temporarily suspend your capacity to send email if we deem that the email you send is of poor or doubtful quality (for instance, if it has a high bounce or complaint rate, contains unsolicited or malicious information, etc.).


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Ques. 4): When I send specific kinds of emails, can I provide a dedicated IP address?

Answer:

You can establish groupings (pools) of the dedicated IP addresses you've leased to use with your Amazon SES account by using the dedicated IP pools feature. You can then link each pool to a configuration set, which restricts the IP addresses from which emails can be sent while using that configuration set.


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Ques. 5): Can I send emails from my current applications using Amazon SES?

Answer:

You can build a private SMTP relay using Amazon SES to use with any third-party or current SMTP client software that can send email using the SMTP protocol, including software you construct yourself.


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Ques. 6): Can Amazon SES send emails with attachments?

Answer:

Amazon SES supports many popular content formats, including documents, images, audio, and video.

For your own safety and that of your customers, Amazon SES scans every attachment that you send for viruses and malware. You can use an email client that supports SMTP to send email with attachments. When you configure a client to send outgoing email through Amazon SES, the client constructs the appropriate MIME parts and email headers before sending the message.

You can also send email with attachments programmatically. To include an attachment in your email, construct a new multipart email message. In the message, include a MIME part that contains an appropriate Content-Type header, along with the MIME-encoded content. Next, use the Content-Disposition header to specify whether the content is to be displayed inline or treated as an attachment.

Once you've composed your message, you can use the SendRawEmail API operation to send it.

 

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Ques. 7): How quickly do emails sent over Amazon SES get to recipients' inboxes?

Answer:

Within a few seconds of receiving a request, Amazon SES makes an effort to transmit emails to the Internet. However, we are unable to determine with precision when your email will arrive or the precise path the message will take to reach its destination due to a number of circumstances and the inherent ambiguities of the Internet.

 

For instance, a momentary issue like "mailbox full" can prevent an ISP from sending the email to the receiver. Amazon makes an effort to redeliver the message in these circumstances. Amazon SES does not retry to send the message if the issue is persistent, such as "mailbox does not exist," and you are notified of a hard bounce. You can configure delivery notifications to notify you when one of your emails is successfully delivered to a recipient's mail server.


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Ques. 8): Can I encrypt received email messages?

Answer:

AWS Key Management Service (KMS), with which Amazon SES has integrated, enables you to encrypt the mail that is written to your Amazon S3 bucket. Your email is encrypted via client-side encryption before being sent to Amazon S3 by Amazon SES. This indicates that when you retrieve the message from Amazon S3, you must decrypt the content on your end. You can get a client that can take care of the decryption with the help of the AWS Java SDK and AWS Ruby SDK.


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Ques. 9): What distinguishes Amazon SES from Amazon SNS?

Answer:

Applications that require the sending of email communications should use Amazon SES. Numerous MIME types and customised email header fields are supported by Amazon SES.

While numerous subscribers can request and receive "push" notifications of time-critical messages over a selection of transport protocols, including HTTP, Amazon SQS, and email, Amazon Simple Notification Service (Amazon SNS) is for messaging-oriented applications. The body of an Amazon SNS notice isn't designed to support multimedia material and has a character limit of 8192 UTF-8 strings.

 

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Ques. 10): Does Amazon SES ensure that my emails will be received?

Answer:

To assist ensure that valid, high-quality email is delivered reliably to recipients' inboxes, Amazon SES continuously checks ISP policies. However, delivery of each and every email cannot be guaranteed by Amazon SES or any other email-sending provider. The recipients of your emails may mistakenly provide the wrong email address, ISPs may opt to reject or silently drop them, and recipients may choose not to receive your emails.

 

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Ques. 11): Does using Amazon SES require me to sign up for Amazon EC2 or any other AWS services?

Answer:

Users of Amazon SES do not need to register for any additional AWS services. Whether an application is running in your own data centre, within Amazon EC2, or as a client software solution, as long as it has Internet connection, it can send email using Amazon SES.

 

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Ques. 12): How can Amazon SES be tested quickly and easily?

Answer:

New users can test out Amazon SES's features in the sandbox for the service. You can only email confirmed identities when your account is in the sandbox. An email address or domain that you have demonstrated to be yours is a verified identity.

Additionally, there are restrictions on how much email you can send each day and how many messages you can send each second when your account is in the sandbox.

 

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Ques. 13): Can I use any email address to send emails?

Answer:

No. Only email addresses and domains that you own may be used to send emails using Amazon SES.

You must validate an email address or domain to show that you are the owner. You can validate up to 10,000 email addresses and domains in any combination in each AWS Region.

 

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Ques. 14): What distinguishes a dedicated IP address from a managed IP address?

Answer:

You can manage your sending reputation using both Dedicated IP choices by using reserved IP addresses. You must manually set up and manage your IP addresses if you use Dedicated IP Addresses (standard). Managed dedicated IP addresses eliminate the requirement for manual dedicated IP pool scaling or monitoring. Additionally, it enables you to more correctly predict the warmup condition and avoid oversending, which can harm deliverability.

 

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Ques. 15): Is it possible to test Amazon SES answers without using real recipients' email addresses?

Answer:

Without sending emails to actual recipients, you can use the Amazon SES mailbox simulator to assess your sending speed and your capacity to handle situations like bounces and complaints. Your daily sending quota, bounce and complaint metrics, and complaints received metrics are not affected by messages you send to the mailbox simulator. We do, however, charge you for each message you send to the mailbox simulator, just as we would if you were sending the messages to real clients.

 

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Ques. 16): How does Amazon SES make sure that the mail that arrives is free of viruses and spam?

Answer:

A variety of spam and virus prevention techniques are used by Amazon SES. Block lists are used to stop mail from known spammers from ever entering the system. Every incoming email that has an attachment is additionally virus-scanned. You can choose whether to trust each message by consulting Amazon SES's spam detection results. Amazon SES also delivers the results of the DKIM and SPF checks in addition to the spam and virus evaluations.

 

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Ques. 17): Can bounces or complaints from other Amazon SES users influence the delivery of my emails?

Answer:

Typically, your ability to send email is unaffected when other Amazon SES users send messages that result in bounces or complaints.

When a recipient's email address causes a hard bounce, this rule is disregarded. Amazon SES puts a recipient's email address on a worldwide suppression list when it receives a hard bounce. The call to Amazon SES succeeds if you attempt to send an email to an address that is on the global suppression list, but Amazon SES handles the email as a hard bounce rather than making an attempt to send it.

Emails that you send to addresses on the global suppression list count toward your sending quota and your bounce rate. An email address can remain on the suppression list for up to 14 days.

 

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Ques. 18): Is Domain Keys Identified Mail (DKIM) supported by Amazon SES?

Answer:

Yes, DKIM is supported by Amazon SES. If Easy DKIM has been enabled and setup, Amazon SES will use DKIM to sign your outgoing messages. You can manually sign your email if you'd like. There are a few DKIM headers that you shouldn't sign in order to guarantee optimum deliverability.

 

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Ques. 19): In what ways does Amazon SES contribute to dependable email delivery?

Answer:

Outgoing email messages are screened using content screening algorithms by Amazon SES. These content filters aid in ensuring that the content supplied over Amazon SES adheres to ISP standards. Amazon SES offers a feedback loop with delivery, bounce, and complaint notifications to assist you in further enhancing the deliverability of your emails.

 

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Ques. 20): Does Amazon SES use Transport Layer Security (TLS) to encrypt connections when sending email?

Answer:

For TLS connections, Amazon SES supports TLS 1.2, TLS 1.1, and TLS 1.0.

Amazon SES utilises opportunistic TLS by default. This indicates that Amazon SES makes an effort to connect securely to the receiving mail server at all times. Amazon SES transmits the communication unencrypted if it is unable to establish a secure connection.

You can alter this behaviour so that Amazon SES transmits emails to the recipient email server only when a secure connection can be made.

 

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Top 20 AWS Corretto Interview Questions and Answers

 

 

                The Open Java Development Kit is available as a free, multiplatform, production-ready distribution called Amazon Corretto (OpenJDK). Long-term support for Corretto includes security updates as well as performance improvements. The Java SE standard is certified as being compatible with Corretto, which Amazon uses internally on thousands of production services. On well-known operating systems like Linux, Windows, and macOS, you may create and use Java apps using Corretto.

 

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Ques. 1): Why should I use Corretto?

Answer:

Corretto is an enduring version of the OpenJDK that comes with free long-term support. Internally, Amazon uses thousands of production services to run Corretto. Every change we make to Corretto resolves or lessens an issue we encountered while using OpenJDK. Aside from the usual quarterly schedule, Amazon intends to implement urgent fixes (including security) as soon as they are accessible and prepared for usage.

 

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Ques. 2): What is Amazon Corretto?

Answer:

A build of the Open Java Development Kit (OpenJDK) with ongoing support from Amazon is called Corretto. To guarantee that Corretto complies with the Java SE standard and is accessible on Linux, Windows, and macOS, it has been certified using the Java Technical Compatibility Kit (TCK). It covers Amazon patches that have been effective in maintaining its own services.

 

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Ques. 3): What does Corretto's long-term support (LTS) entail?

Answer:

Amazon Corretto is an Open Java Development Kit (OpenJDK) distribution that is free, multiplatform, and has long-term support (LTS). Up until at least the indicated date for the applicable release version, LTS includes Amazon's promise to provide performance improvements and security upgrades without charge (e.g. May 2026 for Corretto 8). The intention is to give updates every three months. When necessary updates are ready and available, Amazon also intends to implement them outside of the typical quarterly cycle, including security fixes.


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Ques. 4): What must I do if I require assistance with Corretto?

Answer:

Refer to our documentation if you have any general inquiries regarding setting up or using Corretto. Please file a bug report with the upstream OpenJDK project if you have a problem with OpenJDK. Please create an issue or a feature request in the Corretto GitHub repository if you have a specific Corretto problem or wish to suggest a feature that does not concern OpenJDK. You can contact Corretto support if you already have an AWS Support Plan by using your plan.


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Ques. 5): Which OS systems are supported by Corretto 11?

Answer:

Amazon offers Corretto 11 installation packages for Windows, macOS, Linux (glibc), and Linux (musl-libc). Additionally, Docker Hub hosts an official Docker image.

Versions 7, 8, 10, Server 2008 R2, Server 2012, Server 2016, and Server 2019 all support Windows builds.

All versions of macOS that are still getting security updates from Apple are supported by macOS builds. Versions 10.15 (Catalina) and later on x64 (Intel) and 11.0 (Big Sur) and later on aarch64 (M1) architectures are currently supported.

Red Hat Enterprise Linux 6+, CentOS 6+, Ubuntu Linux 14+, Debian Linux 8+, Amazon Linux AMI, and SUSE 12+ all support Linux (glibc) builds.

Alpine Linux 3.12 and later supports Linux (musl-libc) builds.

Linux Arm (glibc) builds are supported on Linux ARMv7+ with glibc 2.25+.


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Ques. 6): Why does a security scanner display a CVE in a docker image?

Answer:

The first advised course of action is to look for an updated version of this image if a security scanner discovers that a Corretto-Docker image contains a CVE. There are updated Corretto-Docker photos on this website.

If there isn't an updated image available, use the proper command to update the platform's packages, such as "apk -U upgrade" for Alpine Linux or "yum update -y —security" for AmazonLinux, to remedy the problem right away.

The seller of the base docker image is in charge of promptly releasing security updates for images and packages. For Amazon Linux, AWS only provides base docker images, which are accessible from the Amazon Linux 2 ECR Public Gallery and the Docker Hub Amazon Linux 2 page. From the Docker Hub Alpine Linux website, you may download Alpine-based Docker images.

When a new base image becomes available, Docker Hub automatically rebuilds Docker images, however the Corretto team does not modify our Dockerfiles to incorporate sporadic package upgrades. If a base docker image provider has not yet made a fresh base image broadly accessible,  please contact that supplier to request that the fix be addressed in a new base docker image distribution.


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Ques. 7): How can I support Corretto?

Answer:

As a mechanism to get code into Corretto, Amazon promotes contributions to the OpenJDK project. The entire OpenJDK community gains from your modifications in this way. Amazon will assess bugs and pull requests on GitHub if your contribution is unique to Corretto, such as changes to the build mechanism.


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Ques. 8): What distinguishes Corretto from OpenJDK?

Answer:

Corretto is an Open JDK distribution that includes Amazon's fixes that have not yet been included in the respective OpenJDK update projects. We concentrate on patches that enhance OpenJDK's stability or performance, selected based on Amazon's observations made while running significant services.


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Ques. 9): What is covered by Corretto's ongoing assistance?

Answer:

Corretto's long-term support (LTS) programme offers free performance upgrades and security updates for Corretto 8 and Corretto 11 through at least May 2026 and September 2027, respectively. The intention is to give updates every three months.

AWS Support Plans, which offer professional advice and assistance for achieving your goals on AWS, are unrelated to LTS for Corretto. Corretto is covered if you already have an AWS Support Plan in the same way that all other supported AWS Services and products are. If you don't have a strategy and your only goal is to get help with Corretto, it might or might not make sense for you to buy one. There are currently no plans to launch Corretto-specific assistance plans. As always, amazon’s roadmaps are a reflection of their customer feedback and also amazon welcome customers feature requests at the Corretto GitHub repository.

 

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Ques. 10): Does Corretto come with JavaFX? If so, which Corretto versions include it by default?

Answer:

Earlier than OpenJDK 11, JavaFX was a part of OpenJDK. Oracle, however, uncoupled JavaFX from OpenJDK in 2018 and dropped it from OpenJDK distributions. JavaFX is supported on the following platforms by Corretto 8:

Generic Linux x64 AL2

JDK Windows x86

JDK for Windows x64

JRE for Windows x86 and x64

No of the version, AWS does not include it on other platforms. For instance, Corretto 8 for Mac M1 does not support JavaFX.

As this edition will have more up-to-date code and generally perform better than its predecessors, Amazon advises upgrading to Corretto 17+, ideally Corretto 17.

 

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Ques. 11): What rules apply to Corretto's licence?

Answer:

Corretto is distributed under the same open source licence as OpenJDK, which is covered under the Class Path Exception of the GNU Public License version 2. (GPLv2 with CPE). Corretto can be used similarly to OpenJDK.

 

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Ques. 12): Which types of fixes will Corretto have, according to Amazon?

Answer:

Security fixes, performance improvements (such as speeding up frequently used functions), scheduling garbage collection, preventing out-of-memory situations, and better monitoring, reporting, and thread management are all part of patches.

 

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Ques. 13): Is Corretto compatible with other JDKs as a drop-in replacement?

Answer:

Unless you're utilising features that aren't present in OpenJDK, Corretto is intended to be a drop-in replacement for all Java SE distributions. Existing command-line arguments, tuning parameters, monitoring, and anything else in place will continue to function as before once Corretto binaries are installed on a host and correctly invoked to run your Java programmes (for example, using the alternatives command on Linux).

 

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Ques. 14): Do you have to pay anything to use Corretto?

Answer:

Corretto is given away free of charge by Amazon under an Open Source licence. The Class Path Exception of the GNU Public License version 2 governs its licencing (GPLv2 with CPE). Its use or dissemination are free on Amazon.

 

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Ques. 15): Which operating systems is Corretto 8 compatible with?

Answer:

Amazon offers Corretto 8 installation packages for Windows, macOS, Linux (glibc), and Linux (musl-libc). Additionally, Docker Hub hosts an official Docker image.

Versions 7, 8, 10, Server 2008 R2, Server 2012, Server 2016, and Server 2019 all support Windows builds.

All versions of macOS that are still getting security updates from Apple are supported by macOS builds. Versions 10.15 (Catalina) and later on x64 (Intel) and 11.0 (Big Sur) and later on aarch64 (M1) architectures are currently supported.

Red Hat Enterprise Linux 6+, CentOS 6+, Ubuntu Linux 14+, Debian Linux 8+, Amazon Linux AMI, and SUSE 12+ all support Linux (glibc) builds.

Alpine Linux 3.12 and later supports Linux (musl-libc) builds.

 

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Ques. 16): What contribution does Amazon make to OpenJDK?

Answer:

Amazon began contributing to OpenJDK in 2017, and we intend to increase both the number and complexity of our contributions.

 

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