DVA-C01 Online Practice Questions and Answers

What type of block cipher does Amazon S3 offer for server side encryption?

A. Triple DES

B. Advanced Encryption Standard

C. Blowfish

D. RC5

A company is using continuous integration and continuous delivery systems. A Developer now needs to automate a software package deployment to both Amazon EC2 instances and virtual servers running on-premises. Which AWS service should be used to accomplish this?

A. AWS CodePipeline

B. AWS CodeBuild

C. AWS Elastic Beanstalk

D. AWS CodeDeploy

An Amazon S3 bucket, "myawsbucket" is configured with website hosting in Tokyo region, what is the region-specific website endpoint?

A. www.myawsbucket.ap-northeast-1.amazonaws.com

B. myawsbucket.s3-website-ap-northeast-1.amazonawscom

C. myawsbucket.amazonaws.com

D. myawsbucket.tokyo.amazonaws.com

In DynamoDB, what type of HTTP response codes indicate that a problem was found with the client request sent to the service?

A. 5xx HTTP response code

B. 200 HTTP response code

C. 306 HTTP response code

D. 4xx HTTP response code

What are the steps to using the AWS CLI to launch a templatized serverless application?

A. Use AWS CloudFormation get-template then CloudFormation execute-change-set.

B. Use AWS CloudFormation validate-template then CloudFormation create-change-set.

C. Use AWS CloudFormation package then CloudFormation deploy.

D. Use AWS CloudFormation create-stack then CloudFormation update-stack.

A Developer wants to enable AWS X-Ray for a secure application that runs in an Amazon ECS environment. What combination of steps will enable X-Ray? (Select THREE.)

A. Create a Docker image that runs the X-Ray daemon.

B. Add instrumentation to the application code for X-Ray.

C. Install the X-Ray daemon on the underlying EC2 instance.

D. Configure and use an IAM EC2 instance role.

E. Register the application with X-Ray.

F. Configure and use an IAM role for tasks.

A Developer needs to deploy an application running on AWS Fargate using Amazon ECS. The application has environment variables that must be passed to a container tor the application to initialize How should the environment variables be passed to the container?

A. Define an array that includes the environment variables under the environment parameter within the service definition

B. Define an array that includes the environment variables under the environment parameter within the task definition

C. Define an array that includes the environment variables under the entrypoint parameter within the task definition

D. Define in array that includes the environment variables under the entryPoint parameter within the service definition

An application stores images in an S3 bucket. Amazon S3 event notifications are used to trigger a Lambda function that resizes the images. Processing each image takes less than a second. How will AWS Lambda handle the additional traffic?

A. Lambda will scale out to execute the requests concurrently.

B. Lambda will handle the requests sequentially in the order received.

C. Lambda will process multiple images in a single execution.

D. Lambda will add more compute to each execution to reduce processing time.

After launching an instance that you intend to serve as a NAT (Network Address Translation) device in a public subnet you modify your route tables to have the NAT device be the target of internet bound traffic of your private subnet. When you try and make an outbound connection to the Internet from an instance in the private subnet, you are not successful.

Which of the following steps could resolve the issue?

A. Attaching a second Elastic Network interface (ENI) to the NAT instance, and placing it in the private subnet

B. Attaching a second Elastic Network Interface (ENI) to the instance in the private subnet, and placing it in the public subnet

C. Disabling the Source/Destination Check attribute on the NAT instance

D. Attaching an Elastic IP address to the instance in the private subnet

A website's page load times are gradually increasing as more users access the system at the same time. Analysis indicates that a user profile is being loaded from a database in all the web pages being visited by each user and this is increasing the database load and the page load latency. To address this issue the Developer decides to cache the user profile data.

Which caching strategy will address this situation MOST efficiently?

A. Create a new Amazon EC2 Instance and run a NoSQL database on it. Cache the profile data within this database using the write-through caching strategy.

B. Create an Amazon ElastiCache cluster to cache the user profile data. Use a cache-aside caching strategy.

C. Use a dedicated Amazon RDS instance for caching profile data. Use a write-through caching strategy.

D. Create an ElastiCache cluster to cache the user profile data. Use a write-through caching strategy.

A developer has written a serverless application and wants to deploy it to AWS Lambda to leverage the function's multi-threaded execution to improve performance. Which action should the developer take to achieve these requirements?

A. increase the Lambda function execution timeout

B. Use unreserved account concurrency.

C. Increase the memory allocation of the Lambda function

D. Set the reserved concurrency of the Lambda function to a higher number

A developer tested an application locally and then deployed it to AWS Lambda. While testing the application remotely, the Lambda function fails with an access denied message. How can this issue be addressed?

A. Update the Lambda function's execution role to include the missing permissions.

B. Update the Lambda function's resource policy to include the missing permissions.

C. Include an IAM policy document at the root of the deployment package and redeploy the Lambda function.

D. Redeploy the Lambda function using an account with access to the AdministratorAccess policy.

A developer is writing a web application that is deployed on Amazon EC2 instances behind an internet-facing Application Load Balancer (ALB). The developer must add an Amazon CloudFront distribution in front of the ALB. The developer also must ensure that customer data from outside the VPC is encrypted in transit.

Which combination of CloudFront configuration settings should the developer use to meet these requirements? (Choose two.)

A. Restrict viewer access by using signed URLs.

B. Set the Origin Protocol Policy setting to Match Viewer.

C. Enable field-level encryption.

D. Enable automatic object compression.

E. Set the Viewer Protocol Policy setting to Redirect HTTP to HTTPS.

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. Configure a TTL attribute for the leaderboard data.

B. Use DynamoDB Streams to schedule and delete 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.

A developer is working on a serverless application that needs to process any changes to an Amazon DynamoDB table with an AWS Lambda function. How should the developer configure the Lambda function to detect changes to the DynamoDB table?

A. Create an Amazon Kinesis data stream, and attach it to the DynamoDB table. Create a trigger to connect the data stream to the Lambda function.

B. Create an Amazon EventBridge (Amazon CloudWatch Events) rule to invoke the Lambda function on a regular schedule. Connect to the DynamoDB table from the Lambda function to detect changes.

C. Enable DynamoDB Streams on the table. Create a trigger to connect the DynamoDB stream to the Lambda function.

D. Create an Amazon Kinesis Data Firehose delivery stream, and attach it to the DynamoDB table. Configure the delivery stream destination as the Lambda function.