Free Amazon DVA-C02 Exam Questions

Question 1

A developer needs to export the contents of several Amazon DynamoDB tables into Amazon S3 buckets to comply with company data regulations. The developer uses the AWS CLI to run commands to export from each table to the proper S3 bucket. The developer sets up AWS credentials correctly and grants resources appropriate permissions. However, the exports of some tables fail. What should the developer do to resolve this issue?

A : Ensure that point-in-time recovery is enabled on the DynamoDB tables.

B : Ensure that the target S3 bucket is in the same AWS Region as the DynamoDB table.

C : Ensure that DynamoDB streaming is enabled for the tables.

D : Ensure that DynamoDB Accelerator (DAX) is enabled.

Answer: B

Question 2

A start-up organization is launching a new website. Which statement correctly describes how to set up the domain, routing, and health checks in AWS?

A : Use Route 53 to specify the IP address to perform health checks, register a domain name, and route the internet traffic to domain.

B : Route 53 to register a domain name and perform routing to the domain and Shield to perform health checks on resources.

C : Route 53 to register a domain name and AWS Certificate Manager to perform routing to the domain and Shield to perform health checks on resources.

D : Route 53 to register a domain name, route the internet traffic to domain, and specify the values to perform health checks on resources.

Answer: D

Question 3

A company is expanding the compatibility of its photo-snaring mobile app to hundreds of additional devices with unique screen dimensions and resolutions. Photos are stored in Amazon S3 in their original format and resolution. The company uses an Amazon CloudFront distribution to serve the photos The app includes the dimension and resolution of the display as GET parameters with every request. A developer needs to implement a solution that optimizes the photos that are served to each device to reduce load time and increase photo quality. Which solution will meet these requirements MOST cost-effective?

A : Use S3 Batch Operations to invoke an AWS Lambda function to create new variants of the photos with the required dimensions and resolutions. Create a dynamic CloudFront origin that automatically maps the request of each device to the corresponding photo variant.

B : Use S3 Batch Operations to invoke an AWS Lambda function to create new variants of the photos with the required dimensions and resolutions. Create a Lambda@Edge function to route requests to the corresponding photo variant by using request headers.

C : Create a Lambda@Edge function that optimizes the photos upon request and returns the photos as a response. Change the CloudFront TTL cache policy to the maximum value possible.

D : Create a Lambda@Edge function that optimizes the photos upon request and returns the photos as a response. In the same function, store a copy of the processed photos on Amazon S3 for subsequent requests.

Answer: D

Question 4

A developer is creating an application that uses an AWS Lambda function to transform and load data from an Amazon S3 bucket. When the developer tests the application, the developer finds that some invocations of the Lambda function are slower than others. The developer needs to update the Lambda function to have predictable invocation durations that run with low latency. Any initialization activities, such as loading libraries and instantiating clients, must run during allocation time rather than during actual function invocations. Which combination of steps will meet these requirements? (Select TWO.)

A : Create a schedule group in Amazon EventBridge Scheduler to invoke the Lambda function.

B : Configure provisioned concurrency for the Lambda function to have the necessary number of execution environments.

C : Use the SLATEST version of the Lambda function.

D : Configure reserved concurrency for the Lambda function to have the necessary number of execution environments.

E : Deploy changes, and publish a new version of the Lambda function.

Answer: B,D

Question 5

A developer from your team has configured the load balancer to route traffic equally between instances or across Availability Zones. However, Elastic Load Balancing (ELB) routes more traffic to one instance or Availability Zone than the others.

Why is this happening and how can it be fixed? (Select two)

A : There could be short-lived TCP connections between clients and instances

B : Sticky sessions are enabled for the load balancer

C : Instances of a specific capacity type aren’t equally distributed across Availability Zones

D : For Application Load Balancers, cross-zone load balancing is disabled by default

E : After you disable an Availability Zone, the targets in that Availability Zone remain registered with the load balancer, thereby receiving random bursts of traffic

Answer: B,C