AWS-DA(201-210)
AWS Development Quiz
Test your knowledge on AWS services and practices with our comprehensive quiz designed for developers. This quiz covers a range of topics, from API Gateway to DynamoDB and RDS encryption.
Challenge yourself with questions that include:
- API deployment strategies
- Data encryption techniques
- Debugging build failures
- Optimizing application performance
Amazon API Gateway is used in a company's new mobile application. As the development team completes a new version of its APIs, a developer must roll out the API modification securely and transparently. What is the SIMPLEST method for a developer to deploy a new API version to a restricted number of consumers using API Gateway?
A. Create a new API in API Gateway. Direct a portion of the traffic to the new API using an Amazon Route 53 weighted routing policy.
B. Validate the new API version and promote it to production during the window of lowest expected utilization
C. Implement an Amazon CloudWatch alarm to trigger a rollback if the observed HTTP 500 status code rate exceeds a predetermined threshold.
D. Use the canary release deployment option in API Gateway. Direct a percentage of the API traffic using the canarySettings setting.
A programmer is developing a REST API that will allow users to add goods to a shopping list. The service is developed on Amazon API Gateway and integrates with AWS Lambda. The shopping list items are sent to the function as query string arguments. How should the developer transform query string parameters to Lambda function arguments?
A. Enable request validation
B. Include the Amazon Resource Name (ARN) of the Lambda function
C. Change the integration type
D. Create a mapping template
A firm is compiling a website using AWS CodeBuild from source code saved in AWS CodeCommit. Due to a recent modification to the source code, the CodeBuild project is unable to assemble the website correctly. How is the developer to determine the root cause of the failures?
A. Modify the buildspec.yml file to include steps to send the output of build commands to Amazon CloudWatch.
B. Use a custom Docker image that includes the AWS X-Ray agent in the AWS CodeBuild project configuration.
C. Check the build logs of the failed phase in the last build attempt in the AWS CodeBuild project build history.
D. Manually re-run the build process on a local machine so that the output can be visualized.
Over SSH, a developer connects to AWS CodeCommit. The SSH keys used to connect to AWS CodeCommit are associated with the following user:
The developer is responsible for creating and deleting branches. Which particular IAM permissions, based on the concept of least privilege, should be added?
A. ג€codecommit:CreateBranchג€ ג€codecommit:DeleteBranchג€
B. ג€codecommit:Put*ג€
C. ג€codecommit:Update*ג€
D. ג€codecommit:*ג€
A developer is attempting to monitor the status of an application by running a cron job that returns 1 when the service is up and 0 when it is down. The developer wrote code to publish the custom metrics to Amazon CloudWatch and set an alert using the AWS CLI put-metric-alarm function. The Developer, on the other hand, is unable to issue an alert since the custom metrics are not visible in the CloudWatch interface. What is the source of this problem?
A. Sending custom metrics using the CLI is not supported.
B. The Developer needs to use the put-metric-data command.
C. The Developer must use a unified CloudWatch agent to publish custom metrics.
D. The code is not running on an Amazon EC2 instance.
Amazon Kinesis Streams is being used by a web application to store clickstream data that may not be utilized for up to 12 hours. How can the developer encrypt data in the Kinesis Streams at rest?
A. Enable SSL connections to Kinesis
B. Use Amazon Kinesis Consumer Library
C. Encrypt the data once it is at rest with a Lambda function
D. Enable server-side encryption in Kinesis Streams
A business is building a web application that will enable workers to submit their profile pictures to a private Amazon S3 bucket. There is no restriction on the size of the profile images that should be shown each time an employee checks in. The images cannot be made publicly available for security reasons. What is a long-term feasible solution to this situation?
A. Generate a presigned URL when a picture is uploaded. Save the URL in an Amazon DynamoDB table. Return the URL to the browser when the employee logs in.
B. Save the picture's S3 key in an Amazon DynamoDB table. Create an Amazon S3 VPC endpoint to allow the employees to download pictures once they log in.
C. Encode a picture using base64. Save the base64 string in an Amazon DB table. Allow the browser to retrieve the string and convert it to a picture.
D. Save the picture's S3 key in an Amazon DynamoDB table. Use a function to generate a presigned URL every time an employee logs in. Return the URL to the browser.
A company's ecommerce website is experiencing large traffic surges, resulting in database performance issues. Users remark that viewing the website takes an excessive amount of time. A developer want to use Amazon ElastiCache to construct a caching layer. The website must be responsive regardless of whatever product a user visits, and product information and pricing must be updated consistently. Which policy for writing to the cache will meet these requirements?
A. Write to the cache directly and sync the backend at a later time
B. Write to the backend first and wait for the cache to expire
C. Write to the cache and the backend at the same time
D. Write to the backend first and invalidate the cache
A business is developing a stock trading application. The program requires a latency of less than one millisecond to handle trading requests. The firm stores all trade data in Amazon DynamoDB, which is utilized to perform each trading request. A development team conducts load testing on the application and discovers that the time required to get data is longer than intended. The development team need a solution that significantly improves data retrieval time with the least amount of work feasible. Which solution satisfies these criteria?
A. Add local secondary indexes (LSIs) for trading data.
B. Store trading data in Amazon S3 and use Transfer Acceleration.
C. Add retries with exponential back-off for DynamoDB queries
D. Use DynamoDB Accelerator to cache trading data.
A business runs an application that makes use of an Amazon RDS DB instance as the database. A developer must implement database encryption at rest. Which measures should the developer perform in combination to satisfy this requirement? (Select two.)
A. Enable encryption on the DB instance in the AWS Management Console.
B. Stop the DB instance.
C. Restore the DB instance from the encrypted snapshot.
D. Take a snapshot of the DB instance, and create an encrypted copy of the snapshot.
E. Create a customer managed key in AWS Key Management Service (AWS KMS).
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