DVA-C02 - findprotools.com

dva-c02 Fast Test

Total question: 10 (Login to full test)

Question 1:

An Auto Scaling group has a maximum capacity of 3, a current capacity of 2, and a scaling policy that adds 3 instances.

When executing this scaling policy, what is the expected outcome?

Amazon EC2 Auto Scaling does not add any instances to the group, but suggests changing the scaling policy to add one instance

Amazon EC2 Auto Scaling adds 3 instances to the group

Amazon EC2 Auto Scaling adds 3 instances to the group and scales down 2 of those instances eventually

Amazon EC2 Auto Scaling adds only 1 instance to the group

Question 2:

A developer with access to the AWS Management Console terminated an instance in the us-east-1a availability zone. The attached EBS volume remained and is now available for attachment to other instances. Your colleague launches a new Linux EC2 instance in the us-east-1e availability zone and is attempting to attach the EBS volume. Your colleague informs you that it is not possible and need your help.

Which of the following explanations would you provide to them?

The EBS volume is encrypted

The required IAM permissions are missing

EBS volumes are AZ locked

EBS volumes are region locked

Question 3:

An application running on EC2 instances processes messages from an SQS queue. However, sometimes the messages are not processed and they end up in errors. These messages need to be isolated for further processing and troubleshooting.

Which of the following options will help achieve this?

Increase the VisibilityTimeout

Reduce the VisibilityTimeout

Use DeleteMessage

Implement a Dead-Letter Queue

Question 4:

A company runs its flagship application on a fleet of Amazon EC2 instances. After misplacing a couple of private keys from the SSH key pairs, they have decided to re-use their SSH key pairs for the different instances across AWS Regions.

As a Developer Associate, which of the following would you recommend to address this use-case?

Store the public and private SSH key pair in AWS Trusted Advisor and access it across AWS Regions

Encrypt the private SSH key and store it in the S3 bucket to be accessed from any AWS Region

It is not possible to reuse SSH key pairs across AWS Regions

Generate a public SSH key from a private SSH key. Then, import the key into each of your AWS Regions

Question 5:

As a Senior Developer, you are tasked with creating several API Gateway powered APIs along with your team of developers. The developers are working on the API in the development environment, but they find the changes made to the APIs are not reflected when the API is called.

As a Developer Associate, which of the following solutions would you recommend for this use-case?

Enable Lambda authorizer to access API

Redeploy the API to an existing stage or to a new stage

Use Stage Variables for development state of API

Developers need IAM permissions on API execution component of API Gateway

Question 6:

A CRM application is hosted on Amazon EC2 instances with the database tier using DynamoDB. The customers have raised privacy and security concerns regarding sending and receiving data across the public internet.

As a developer associate, which of the following would you suggest as an optimal solution for providing communication between EC2 instances and DynamoDB without using the public internet?

The firm can use a virtual private network (VPN) to route all DynamoDB network traffic through their own corporate network infrastructure

Configure VPC endpoints for DynamoDB that will provide required internal access without using public internet

Create a NAT Gateway to provide the necessary communication channel between EC2 instances and DynamoDB

Create an Internet Gateway to provide the necessary communication channel between EC2 instances and DynamoDB

Question 7:

You have launched several AWS Lambda functions written in Java. A new requirement was given that over 1MB of data should be passed to the functions and should be encrypted and decrypted at runtime.

Which of the following methods is suitable to address the given use-case?

Use Envelope Encryption and store as environment variable

Use KMS direct encryption and store as file

Use Envelope Encryption and reference the data as file within the code

Use KMS Encryption and store as environment variable

Question 8:

The app development team at a social gaming mobile app wants to simplify the user sign up process for the app. The team is looking for a fully managed scalable solution for user management in anticipation of the rapid growth that the app foresees.

As a Developer Associate, which of the following solutions would you suggest so that it requires the LEAST amount of development effort?

Use Cognito User pools to facilitate sign up and user management for the mobile app

Use Cognito Identity pools to facilitate sign up and user management for the mobile app

Create a custom solution using Lambda and DynamoDB to facilitate sign up and user management for the mobile app

Create a custom solution using EC2 and DynamoDB to facilitate sign up and user management for the mobile app

Question 9:

A developer working with EC2 Windows instance has installed Kinesis Agent for Windows to stream JSON-formatted log files to Amazon Simple Storage Service (S3) via Amazon Kinesis Data Firehose. The developer wants to understand the sink type capabilities of Kinesis Firehose.

Which of the following sink types is NOT supported by Kinesis Firehose.

Amazon Elasticsearch Service (Amazon ES) with optionally backing up data to Amazon S3

Amazon ElastiCache with Amazon S3 as backup

Amazon Simple Storage Service (Amazon S3) as a direct Firehose destination

Amazon Redshift with Amazon S3

Question 10:

A development team is building a game where players can buy items with virtual coins. For every virtual coin bought by a user, both the players table as well as the items table in DynamodDB need to be updated simultaneously using an all-or-nothing operation.

As a developer associate, how will you implement this functionality?

Use BatchWriteItem API to update multiple tables simultaneously

Capture the transactions in the items table using DynamoDB streams and then sync with the players table

Capture the transactions in the players table using DynamoDB streams and then sync with the items table

Use TransactWriteItems API of DynamoDB Transactions