EXAM DUMPS DVA-C02 DEMO, NEW DVA-C02 EXAM BOOK

Exam Dumps DVA-C02 Demo, New DVA-C02 Exam Book

Exam Dumps DVA-C02 Demo, New DVA-C02 Exam Book

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Tags: Exam Dumps DVA-C02 Demo, New DVA-C02 Exam Book, Valid DVA-C02 Exam Camp Pdf, DVA-C02 Reliable Exam Braindumps, Useful DVA-C02 Dumps

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To earn the AWS Certified Developer - Associate certification, candidates must pass the DVA-C02 exam. DVA-C02 exam consists of multiple-choice and multiple-response questions that cover various topics, such as AWS core services, AWS databases, AWS security, AWS deployment, and AWS troubleshooting. DVA-C02 Exam Duration is 130 minutes, and the passing score is 720 out of 1000.

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Amazon AWS Certified Developer - Associate Sample Questions (Q179-Q184):

NEW QUESTION # 179
A developer is optimizing an AWS Lambda function and wants to test the changes in production on a small percentage of all traffic. The Lambda function serves requests to a REST API in Amazon API Gateway. The developer needs to deploy their changes and perform a test in production without changing the API Gateway URL.
Which solution will meet these requirements?

  • A. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function code. Update the API Gateway endpoint to use the $LATEST version of the Lambda function. Deploy a new API Gateway stage.
  • B. Define an alias on the $LATEST version of the Lambda function. Update the API Gateway endpoint to reference the new Lambda function alias. Upload and publish the optimized Lambda function code. On the production API Gateway stage, define a canary release and set the percentage of traffic to direct to the canary release. Update the API Gateway endpoint to use the SLAT EST version of the Lambda function. Publish to the canary stage.
  • C. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function code. Update the API Gateway endpoint to use the $LATEST version of the Lambda function. Deploy the API to the production API Gateway stage.
  • D. Define a function version for the currently deployed production Lambda function. Update the API Gateway endpoint to reference the new Lambda function version. Upload and publish the optimized Lambda function code. On the production API Gateway stage, define a canary release and set the percentage of traffic to direct to the canary release. Update the API Gateway endpoint to use the
    $LATEST version of the Lambda function. Publish the API to the canary stage.

Answer: B

Explanation:
* A Lambda alias is a pointer to a specific Lambda function version or another alias1. A Lambda alias allows you to invoke different versions of a function using the same name1. You can also split traffic between two aliases by assigning weights to them1.
* In this scenario, the developer needs to test their changes in production on a small percentage of all traffic without changing the API Gateway URL. To achieve this, the developer can follow these steps:
* Define an alias on the $LATEST version of the Lambda function. This will create a new alias that points to the latest code of the function.
* Update the API Gateway endpoint to reference the new Lambda function alias. This will make the API Gateway invoke the alias instead of a specific version of the function.
* Upload and publish the optimized Lambda function code. This will update the $LATEST version of the function with the new code.
* On the production API Gateway stage, define a canary release and set the percentage of traffic to direct to the canary release. This will enable API Gateway to perform a canary deployment on a new API2. A canary deployment is a software development strategy in which a new version of an API is deployed for testing purposes, and the base version remains deployed as a production release for normal operations on the same stage2. The canary release receives a small percentage of API traffic and the production release takes up the rest2.
* Update the API Gateway endpoint to use the $LATEST version of the Lambda function. This will
* make the canary release invoke the latest code of the function, which contains the optimized changes.
* Publish to the canary stage. This will deploy the changes to a subset of users for testing.
* By using this solution, the developer can test their changes in production on a small percentage of all traffic without changing the API Gateway URL. The developer can also monitor and compare metrics between the canary and production releases, and promote or disable the canary as needed2.


NEW QUESTION # 180
A company built an online event platform For each event the company organizes quizzes and generates leaderboards that are based on the quiz scores. The company stores the leaderboard data in Amazon DynamoDB and retains the data for 30 days after an event is complete The company then uses a scheduled job to delete the old leaderboard data The DynamoDB table is configured with a fixed write capacity. During the months when many events occur, the DynamoDB write API requests are throttled when the scheduled delete job runs.
A developer must create a long-term solution that deletes the old leaderboard data and optimizes write throughput Which solution meets these requirements?

  • A. Use DynamoDB Streams to schedule and delete the leaderboard data
  • B. Configure a TTL attribute for the leaderboard data
  • C. Use AWS Step Functions to schedule and delete the leaderboard data.
  • D. Set a higher write capacity when the scheduled delete job runs

Answer: B


NEW QUESTION # 181
A company has an ecommerce application. To track product reviews, the company's development team uses an Amazon DynamoDB table.
Every record includes the following
* A Review ID a 16-digrt universally unique identifier (UUID)
* A Product ID and User ID 16 digit UUlDs that reference other tables
* A Product Rating on a scale of 1-5
* An optional comment from the user
The table partition key is the Review ID. The most performed query against the table is to find the 10 reviews with the highest rating for a given product.
Which index will provide the FASTEST response for this query"?

  • A. A global secondary index (GSl) with Product ID as the partition key and Product Rating as the sort key
  • B. A global secondary index (GSl) with Product ID as the partition key and Review ID as the sort key
  • C. A local secondary index (LSI) with Review ID as the partition key and Product ID as the sort key
  • D. A local secondary index (LSI) with Product ID as the partition key and Product Rating as the sort key

Answer: A

Explanation:
Explanation
This solution allows the fastest response for the query because it enables the query to use a single partition key value (the Product ID) and a range of sort key values (the Product Rating) to find the matching items. A global secondary index (GSI) is an index that has a partition key and an optional sort key that are different from those on the base table. A GSI can be created at any time and can be queried or scanned independently of the base table. A local secondary index (LSI) is an index that has the same partition key as the base table, but a different sort key. An LSI can only be created when the base table is created and must be queried together with the base table partition key. Using a GSI with Product ID as the partition key and Review ID as the sort key will not allow the query to use a range of sort key values to find the highest ratings. Using an LSI with Product ID as the partition key and Product Rating as the sort key will not work because Product ID is not the partition key of the base table. Using an LSI with Review ID as the partition key and Product ID as the sort key will not allow the query to use a single partition key value to find the matching items.


NEW QUESTION # 182
A developer is creating a simple proof-of-concept demo by using AWS CloudFormation and AWS Lambda functions. The demo will use a CloudFormation template to deploy an existing Lambda function. The Lambda function uses deployment packages and dependencies stored in Amazon S3. The developer defined an AWS::Lambda::Function resource in a CloudFormation template.
The developer needs to add the S3 bucket to the CloudFormation template.
What should the developer do to meet these requirements with the LEAST development effort?

  • A. Add the function code in the CloudFormation template as the ZipFile property.
  • B. Find the S3 key for the Lambda function. Add the S3 key as the ZipFile property in the CloudFormation template.
  • C. Add the relevant key and bucket to the S3Bucket and S3Key properties in the CloudFormation template.
  • D. Add the function code in the CloudFormation template inline as the code property.

Answer: B


NEW QUESTION # 183
A developer is writing a serverless application that requires an AWS Lambda function to be invoked every 10 minutes.
What is an automated and serverless way to invoke the function?

  • A. Create an Amazon EventBridge rule that runs on a regular schedule to invoke the Lambda function.
  • B. Create an Amazon Simple Notification Service (Amazon SNS) topic that has a subscription to the Lambda function with a 600-second timer.
  • C. Configure an environment variable named PERIOD for the Lambda function. Set the value to 600.
  • D. Deploy an Amazon EC2 instance based on Linux, and edit its /etc/crontab file by adding a command to periodically invoke the Lambda function.

Answer: A

Explanation:
Amazon EventBridge can be used to run Lambda functions on a regular schedule. You can set a cron or rate expression to define the schedule.


NEW QUESTION # 184
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