DVA-C02 AWS Certified Developer - Associate Free Demo Questions – Try Before You Buy

Question 1

Acompany is running a custom application on a set of on-premises Linux servers that are accessed
using Amazon API Gateway. AWS X-Ray tracing has been enabled on the API test stage.
How can a developer enable X-Ray tracing on the on-premises servers with the LEAST amount of
configuration?

A

Install and run the X-Ray SDK on the on-premises servers to capture and relay the data to the XRay service.

B

Install and run the X-Ray daemon on the on-premises servers to capture and relay the data to the
X-Ray service.

C

Capture incoming requests on-premises and configure an AWS Lambda function to pull, process,
and relay relevant data to X-Ray using the PutTraceSegments API call.

D

Capture incoming requests on-premises and configure an AWS Lambda function to pull, process,
and relay relevant data to X-Ray using the PutTelemetryRecords API call.

Correct Answer: B

Explanation:

The X-Ray daemon is a software that collects trace data from the X-Ray SDK and relays it to the X-Ray
service. The X-Ray daemon can run on any platform that supports Go, including Linux, Windows, and
macOS. The developer can install and run the X-Ray daemon on the on-premises servers to capture
and relay the data to the X-Ray service with minimal configuration. The X-Ray SDK is used to
instrument the application code, not to capture and relay data. The Lambda function solutions are
more complex and require additional configuration.
Reference:
[AWS X-Ray concepts - AWS X-Ray]
[Setting up AWS X-Ray - AWS X-Ray]

Question 2

Adeveloper has an application that makes batch requests directly to Amazon DynamoDB by using
the BatchGetItem low-level API operation. The responses frequently return values in the
UnprocessedKeys element.
Which actions should the developer take to increase the resiliency of the application when the batch
response includes values in UnprocessedKeys? (Choose two.)

A

Retry the batch operation immediately.

B

Retry the batch operation with exponential backoff and randomized delay.

C

Update the application to use an AWS software development kit (AWS SDK) to make the requests.

D

Increase the provisioned read capacity of the DynamoDB tables that the operation accesses.

E

Increase the provisioned write capacity of the DynamoDB tables that the operation accesses.

Correct Answer: B, C

Explanation:

The UnprocessedKeys element indicates that the BatchGetItem operation did not process all of the
requested items in the current response. This can happen if the response size limit is exceeded or if
the table’s provisioned throughput is exceeded. To handle this situation, the developer should retry
the batch operation with exponential backoff and randomized delay to avoid throttling errors and
reduce the load on the table. The developer should also use an AWS SDK to make the requests, as
the SDKs automatically retry requests that return UnprocessedKeys.
Reference:
[BatchGetItem - Amazon DynamoDB]
[Working with Queries and Scans - Amazon DynamoDB]

Question 3

Adeveloper is creating an AWS CloudFormation template to deploy Amazon EC2 instances across
multiple AWS accounts. The developer must choose the EC2 instances from a list of approved
instance types.
How can the developer incorporate the list of approved instance types in the CloudFormation
template?

A

Create a separate CloudFormation template for each EC2 instance type in the list.

B

In the Resources section of the CloudFormation template, create resources for each EC2 instance

type in the list.

C

In the CloudFormation template, create a separate parameter for each EC2 instance type in the
list.

D

In the CloudFormation template, create a parameter with the list of EC2 instance types as
AllowedValues.

Correct Answer: D

Explanation:

In the CloudFormation template, the developer should create a parameter with the list of approved
EC2 instance types as AllowedValues. This way, users can select the instance type they want to use
when launching the CloudFormation stack, but only from the approved list.

Demo Amazon DVA-C02 Exam Questions

Acompany is running a custom application on a set of on-premises Linux servers that are accessed
using Amazon API Gateway. AWS X-Ray tracing has been enabled on the API test stage.
How can a developer enable X-Ray tracing on the on-premises servers with the LEAST amount of
configuration?

Install and run the X-Ray SDK on the on-premises servers to capture and relay the data to the XRay service.

Install and run the X-Ray daemon on the on-premises servers to capture and relay the data to the
X-Ray service.

Capture incoming requests on-premises and configure an AWS Lambda function to pull, process,
and relay relevant data to X-Ray using the PutTraceSegments API call.

Capture incoming requests on-premises and configure an AWS Lambda function to pull, process,
and relay relevant data to X-Ray using the PutTelemetryRecords API call.

Correct Answer: B

Retry the batch operation immediately.

Retry the batch operation with exponential backoff and randomized delay.

Update the application to use an AWS software development kit (AWS SDK) to make the requests.

Increase the provisioned read capacity of the DynamoDB tables that the operation accesses.

Increase the provisioned write capacity of the DynamoDB tables that the operation accesses.

Correct Answer: B, C

Adeveloper is creating an AWS CloudFormation template to deploy Amazon EC2 instances across
multiple AWS accounts. The developer must choose the EC2 instances from a list of approved
instance types.
How can the developer incorporate the list of approved instance types in the CloudFormation
template?

Create a separate CloudFormation template for each EC2 instance type in the list.

type in the list.

In the CloudFormation template, create a separate parameter for each EC2 instance type in the
list.

In the CloudFormation template, create a parameter with the list of EC2 instance types as
AllowedValues.

Correct Answer: D

In the CloudFormation template, the developer should create a parameter with the list of approved
EC2 instance types as AllowedValues. This way, users can select the instance type they want to use
when launching the CloudFormation stack, but only from the approved list.

Demo Practice Mode

Demo Amazon DVA-C02 Exam Questions

Acompany is running a custom application on a set of on-premises Linux servers that are accessedusing Amazon API Gateway. AWS X-Ray tracing has been enabled on the API test stage.How can a developer enable X-Ray tracing on the on-premises servers with the LEAST amount ofconfiguration?

Install and run the X-Ray SDK on the on-premises servers to capture and relay the data to the XRay service.

Install and run the X-Ray daemon on the on-premises servers to capture and relay the data to theX-Ray service.

Capture incoming requests on-premises and configure an AWS Lambda function to pull, process,and relay relevant data to X-Ray using the PutTraceSegments API call.

Capture incoming requests on-premises and configure an AWS Lambda function to pull, process,and relay relevant data to X-Ray using the PutTelemetryRecords API call.

Correct Answer: B

Retry the batch operation immediately.

Retry the batch operation with exponential backoff and randomized delay.

Update the application to use an AWS software development kit (AWS SDK) to make the requests.

Increase the provisioned read capacity of the DynamoDB tables that the operation accesses.

Increase the provisioned write capacity of the DynamoDB tables that the operation accesses.

Correct Answer: B, C

Adeveloper is creating an AWS CloudFormation template to deploy Amazon EC2 instances acrossmultiple AWS accounts. The developer must choose the EC2 instances from a list of approvedinstance types.How can the developer incorporate the list of approved instance types in the CloudFormationtemplate?

Create a separate CloudFormation template for each EC2 instance type in the list.

type in the list.

In the CloudFormation template, create a separate parameter for each EC2 instance type in thelist.

In the CloudFormation template, create a parameter with the list of EC2 instance types asAllowedValues.

Correct Answer: D

In the CloudFormation template, the developer should create a parameter with the list of approvedEC2 instance types as AllowedValues. This way, users can select the instance type they want to usewhen launching the CloudFormation stack, but only from the approved list.

Demo Practice Mode

Acompany is running a custom application on a set of on-premises Linux servers that are accessed
using Amazon API Gateway. AWS X-Ray tracing has been enabled on the API test stage.
How can a developer enable X-Ray tracing on the on-premises servers with the LEAST amount of
configuration?

Install and run the X-Ray daemon on the on-premises servers to capture and relay the data to the
X-Ray service.

Capture incoming requests on-premises and configure an AWS Lambda function to pull, process,
and relay relevant data to X-Ray using the PutTraceSegments API call.

Capture incoming requests on-premises and configure an AWS Lambda function to pull, process,
and relay relevant data to X-Ray using the PutTelemetryRecords API call.

In the CloudFormation template, create a separate parameter for each EC2 instance type in the
list.

In the CloudFormation template, create a parameter with the list of EC2 instance types as
AllowedValues.

In the CloudFormation template, the developer should create a parameter with the list of approved
EC2 instance types as AllowedValues. This way, users can select the instance type they want to use
when launching the CloudFormation stack, but only from the approved list.