Free Amazon DVA-C02 Exam Questions

Question 1

A developer has observed an increase in bugs in the AWS Lambda functions that a development team has deployed in its Node is application. To minimize these bugs, the developer wants to impendent automated testing of Lambda functions in an environment that Closely simulates the Lambda environment. The developer needs to give other developers the ability to run the tests locally. The developer also needs to integrate the tests into the team's continuous integration and continuous delivery (Ct/CO) pipeline before the AWS Cloud Development Kit (AWS COK) deployment. Which solution will meet these requirements?

A : Create sample events based on the Lambda documentation. Create automated test scripts that use the cdk local invoke command to invoke the Lambda functions. Check the response. Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.

B : Install a unit testing framework that reproduces the Lambda execution environment. Create sample events based on the Lambda documentation. Invoke the handler function by using a unit testing framework. Check the response. Document how to run the unit testing framework for the other developers on the team. Update the CI/CD pipeline to run the unit testing framework.

C : Install the AWS Serverless Application Model (AWS SAM) CLI tool. Use the sam local generate-event command to generate sample events for the automated tests. Create automated test scripts that use the sam local invoke command to invoke the Lambda functions. Check the response. Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.

D : Create sample events based on the Lambda documentation. Create a Docker container from the Node.js base image to invoke the Lambda functions. Check the response. Document how to run the Docker container for the other developers on the team. Update the CI/CD pipeline to run the Docker container.

Answer: C

Question 2

A developer is building a three-tier web application that should be able to handle a minimum of 5000 requestsper minute. Requirements state that the web tier should be completely stateless while the applicationmaintains session state for the users.How can session data be externalized, keeping latency at the LOWEST possible value?

A : Create an Amazon RDS instance, then implement session handling at the application level to leverage adatabase inside the RDS database instance for session data storage.

B : Implement a shared file system solution across the underlying Amazon EC2 instances, then implementsession handling at the application level to leverage the shared file system for session data storage.

C : Create an Amazon ElastiCache (Memcached) cluster, then implement session handling at theapplication level to leverage the cluster for session data storage.

D : Create an Amazon DynamoDB table, then implement session handling at the application level toleverage the table for session data storage.

Answer: C

Question 3

An application uses an Amazon DynamoDB table that is 50 GB in size and provisioned with 10,000 read capacity units (RCUs) per second. The table must be scanned during non-peak hours when normal traffic consumes around 5,000 RCUs. The Developer must scan the whole table in the shortest possible time whilst ensuring the normal workload is not affected.

How would the Developer optimize this scan cost-effectively?

A : the Parallel Scan API operation and limit the rate.

B : crease read capacity units during the scan operation.

C : sequential scans and set the ConsistentRead parameter to false.

D : sequential scans and apply a FilterExpression.

Answer: A

Question 4

A developer is building an application on AWS. The application has an Amazon API Gateway API that sendsrequests to an AWS Lambda function. The API is experiencing increased latency because the Lambdafunction has limited available CPU to fulfill the requests.Before the developer deploys the API into production, the developer must configure the Lambda function tohave more CPU.Which solution will meet this requirement?

A : Increase the virtual CPU (vCPU) cores quota of the Lambda function.

B : Increase the amount of memory that is allocated to the Lambda function.

C : Increase the ephemeral storage size of the Lambda function.

D : Increase the timeout value of the Lambda function.

Answer: B

Question 5

A company deploys a new application to AWS. The company is streaming application logs to AmazonCloudWatch Logs. The company ' s development team must receive notification by email when the word "ERROR " appears in any log lines. A developer sets up an Amazon SNS topic and subscribes thedevelopment team to the topic.What should the developer do next to meet the requirements?

A : Select the appropriate log group. Create a CloudWatch metric filter with " ERROR " as the search term.Create an alarm on this metric that notifies the SNS topic when the metric is 1 or higher.

B : In CloudWatch Logs Insights, select the appropriate log group. Create a metric query to search for theterm " ERROR " in the logs. Create an alarm on this metric that notifies the SNS topic when the metricis 1 or higher.

C : Select the appropriate log group. Create an SNS subscription filter with " ERROR " as the filter pattern.Select the SNS topic as the destination.

D : Create a CloudWatch alarm that includes " ERROR " as a filter pattern, a log group dimension thatdefines the appropriate log group, and a destination that notifies the SNS topic.

Answer: A