AWS Certified Developer Associate Exam Dumps

Question #121

What does an Amazon SQS delay queue accomplish?

• A. Messages are hidden for a configurable amount of time when they are first added to the queue.
• B. Messages are hidden for a configurable amount of time after they are consumed from the queue.
• C. The consumer can poll the queue for a configurable amount of time before retrieving a message.
• D. Message cannot be deleted for a configurable amount of time after they are consumed from the queue.

Correct Answer: A
Reference:
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-delay-queues.html

Question #122

A company has multiple Developers located across the globe who are updating code incrementally for a development project. When Developers upload code concurrently, internet connectivity is slow and it is taking a long time to upload code for deployment in AWS Elastic Beanstalk.
Which step will result in minimized upload and deployment time with the LEAST amount of administrative effort?

• A. Allow the Developers to upload the code to an Amazon S3 bucket, and deploy it directly to Elastic Beanstalk.
• B. Allow the Developers to upload the code to a central FTP server to deploy the application to Elastic Beanstalk.
• C. Create an AWS CodeCommit repository, allow the Developers to commit code to it, and then directly deploy the code to Elastic Beanstalk.
• D. Create a code repository on an Amazon EC2 instance so that all Developers can update the code, and deploy the application from the instance to Elastic Beanstalk.

Correct Answer: C

Question #123

A company recently migrated its web, application and NoSQL database tiers to AWS. The company is using Auto Scaling to scale the web and application tiers.
More than 95 percent of the Amazon DynamoDB requests are repeated read-requests.
How can the DynamoDB NoSQL tier be scaled up to cache these repeated requests?

• A. Amazon EMR
• B. Amazon DynamoDB Accelerator
• C. Amazon SQS
• D. Amazon CloudFront

Correct Answer: B
Reference:
https://aws.amazon.com/dynamodb/dax/

Question #124

A company is building an application to track athlete performance using an Amazon DynamoDB table. Each item in the table is identified by a partition key
(user_id) and a sort key (sport_name). The table design is shown below:

A Developer is asked to write a leaderboard application to display the top performers (user_id) based on the score for each sport_name.
What process will allow the Developer to extract results MOST efficiently from the DynamoDB table?

• A. Use a DynamoDB query operation with the key attributes of user_id and sport_name and order the results based on the score attribute.
• B. Create a global secondary index with a partition key of sport_name and a sort key of score, and get the results
• C. Use a DynamoDB scan operation to retrieve scores and user_id based on sport_name, and order the results based on the score attribute.
• D. Create a local secondary index with a primary key of sport_name and a sort key of score and get the results based on the score attribute.

Correct Answer: D

Question #125

A Developer is creating a mobile application that will not require users to log in.
What is the MOST efficient method to grant users access to AWS resources?

• A. Use an identity provider to securely authenticate with the application.
• B. Create an AWS Lambda function to create an IAM user when a user accesses the application.
• C. Create credentials using AWS KMS and apply these credentials to users when using the application.
• D. Use Amazon Cognito to associate unauthenticated users with an IAM role that has limited access to resources.

Correct Answer: C

Question #126

An application running on Amazon EC2 instances must access objects within an Amaon S3 busket that are encrypted using server-side encryption using AWS
KMS encryption keys (SSE-KMS). The application must have access to the customer master key (CMK) to decrypt the objects.
Which combination of steps will grant the application access? (Select TWO.)

• A. Write an S3 bucket policy that grants the bucket access to the key.
• B. Grant access to the key in the IAM EC2 role attached to the application’s EC2 instances.
• C. Write a key policy that enables IAM policies to grant access to the key.
• D. Grant access to the key in the S3 bucket’s ACL
• E. Create a Systems Manager parameter that exposes the KMS key to the EC2 instances. AE

 

Question #127

A company needs a fully-managed source control service that will work in AWS. The service must ensure that revision control synchronizes multiple distributed repositories by exchanging sets of changes peer-to-peer. All users need to work productively even when not connected to a network.
Which source control service should be used?

• A. Subversion
• B. AWS CodeBuild
• C. AWS CodeCommit
• D. AWS CodeStar

Correct Answer: C

Question #128

A Developer is writing a serverless application that requires that an AWS Lambda function be invoked every 10 minutes.
What is an automated and serverless way to trigger the function?

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

Correct Answer: C
Reference:
https://aws.amazon.com/blogs/architecture/a-serverless-solution-for-invoking-aws-lambda-at-a-sub-minute-frequency/

Question #129

A Developer is writing an imaging micro service on AWS Lambda. The service is dependent on several libraries that are not available in the Lambda runtime environment.
Which strategy should the Developer follow to create the Lambda deployment package?

• A. Create a ZIP file with the source code and all dependent libraries.
• B. Create a ZIP file with the source code and a script that installs the dependent libraries at runtime.
• C. Create a ZIP file with the source code. Stage the dependent libraries on an Amazon S3 bucket indicated by the Lambda environment variable LD_LIBRARY_PATH
• D. Create a ZIP file with the source code and a buildspec.yaml file that installs the dependent libraries on AWS Lambda.

Correct Answer: B

Question #130

A Developer is designing a fault-tolerant environment where client sessions will be saved.
How can the Developer ensure that no sessions are lost if an Amazon EC2 instance fails?

• A. Use sticky sessions with an Elastic Load Balancer target group.
• B. Use Amazon SQS to save session data.
• C. Use Amazon DynamoDB to perform scalable session hadling.
• D. Use Elastic Load Balancer connection draining to stop sending requests to failing instances.

Correct Answer: A