AWS-Certified-Developer-Associate Free Practice Test

- (Exam Topic 1)
A Developer has been asked to build a real-time dashboard web application to visualize the key prefixes and storage size of objects in Amazon S3 buckets. Amazon DynamoDB will be used to store the Amazon S3 metadata.
What is the optimal and MOST cost-effective design to ensure that the real-time dashboard is kept up to date with the state of the objects in the Amazon S3 buckets?

1. A. Use an Amazon CloudWatch event backed by an AWS Lambda functio
2. B. Issue an Amazon S3 API call to get a list of all Amazon S3 objects and persist the metadata within DynamoD
3. C. Have the web application poll the DynamoDB table to reflect this change.
4. D. Use Amazon S3 Event Notification backed by a Lambda function to persist the metadata into DynamoD
5. E. Have the web application poll the DynamoDB table to reflect this change.
6. F. Run a cron job within an Amazon EC2 instance to list all objects within Amazon S3 and persist the metadata into DynamoD
7. G. Have the web application poll the DynamoDB table to reflect this change.
8. H. Create a new Amazon EMR cluster to get all the metadata about Amazon S3 objects; persist the metadata into DynamoD
9. I. Have the web application poll the DynamoDB table to reflect this change.

Correct Answer: A

- (Exam Topic 3)
A developer is building an application that processes a stream of user-supplied data The data stream must be consumed by multiple Amazon EC2 based processing applications in parallel and in real time. Each processor must be able to resume without losing data if there is a service interruption. The Application Architect plans to add other processors in the near future, and wants to minimize the amount of data duplication involved.
Which solution will satisfy these requirements?

1. A. Publish the data to Amazon SQS
2. B. Publish the data to Amazon Kinesis Data Firehose
3. C. Publish the data to Amazon CloudWatch Events.
4. D. Publish the data to Amazon Kinesis Data Streams.

Correct Answer: A

- (Exam Topic 3)
A company has an internal website that gives users the ability to access contract Idata that is stored in an Amazon RDS DB instance The number of contracts has increased and several users have reported slow retrieval of the contract data
The company wants to set up a cache to improve the latency A developer must create a solution that ensures data resiliency The data must be encrypted and must be partitioned by department
Which solution will meet these requirements?

1. A. Amazon ElastiCache for Memcached with cluster mode enabled
2. B. Amazon ElastiCache for Redis with cluster mode enabled
3. C. Amazon ElastiCache for Redis with cluster mode disabled
4. D. Amazon ElastiCache for Memcached with cluster mode disabled

Correct Answer: C

- (Exam Topic 4)
An AWS Lambda function requires read access to an Amazon S3 bucket and requires read/write access to an Amazon DynamoDB table. The correct 1AM policy already exists. What is the MOST secure way to grant the Lambda function access to the S3 bucket and the DynamoDB table?

1. A. Attach the existing IAM policy to the Lambda function.
2. B. Create an IAM role for the Lambda functio
3. C. Attach the existing IAM policy to the rol
4. D. Attach the role to the Lambda function.
5. E. Create an IAM user with programmatic acces
6. F. Attach the existing IAM policy to the use
7. G. Add the user access key ID and secret access key as environment variables in the Lambda function.
8. H. Add the AWS account root user access key ID and secret access key as encrypted environment variables in the Lambda function.

Correct Answer: B

- (Exam Topic 2)
A company requires that AWS Lambda functions written by developers log errors so system administrators
can more effectively troubleshoot issues What should the developers implement to meet this need?

1. A. Publish errors to a dedicated Amazon SQS queue
2. B. Create an Amazon CloudWatch Events event to trigger based on certain Lambda events.
3. C. Report errors through logging statements in Lambda function code.
4. D. Set up an Amazon SNS topic that sends logging statements upon failure

Correct Answer: B