DVA-C02 - findprotools.com

dva-c02 Fast Test

Total question: 10 (Login to full test)

Question 1:

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 2:

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 3:

Your team lead has asked you to learn AWS CloudFormation to create a collection of related AWS resources and provision them in an orderly fashion. You decide to provide AWS-specific parameter types to catch invalid values.

When specifying parameters which of the following is not a valid Parameter type?

String

CommaDelimitedList

DependentParameter

AWS::EC2::KeyPair::KeyName

Question 4:

A university has created a student portal that is accessible through a smartphone app and web application. The smartphone app is available in both Android and IOS and the web application works on most major browsers. Students will be able to do group study online and create forum questions. All changes made via smartphone devices should be available even when offline and should synchronize with other devices.

Which of the following AWS services will meet these requirements?

BeanStalk

Cognito User Pools

Cognito Identity Pools

Cognito Sync

Question 5:

A developer wants to securely store and retrieve various types of variables, such as remote API authentication information, API URL, and related credentials across different environments of an application deployed on Amazon Elastic Container Service (Amazon ECS).

What would be the best approach that needs minimal modifications in the application code?

Configure the application to fetch the variables and credentials from AWS Systems Manager Parameter Store by leveraging hierarchical unique paths in Parameter Store for each variable in each environment

Configure the application to fetch the variables from each of the deployed environments by defining the authentication information and API URL in the ECS task definition as unique names during the deployment process

Configure the application to fetch the variables from AWS KMS by storing the API URL and credentials as unique keys in KMS for each environment

Configure the application to fetch the variables from an encrypted file that is stored with the application by storing the API URL and credentials in unique files for each environment

Question 6:

A media publishing company is using Amazon EC2 instances for running their business-critical applications. Their IT team is looking at reserving capacity apart from savings plans for the critical instances.

As a Developer Associate, which of the following reserved instance types you would select to provide capacity reservations?

Neither Regional Reserved Instances nor Zonal Reserved Instances

Both Regional Reserved Instances and Zonal Reserved Instances

Regional Reserved Instances

Zonal Reserved Instances

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:

A business has purchased one m4.xlarge Reserved Instance but it has used three m4.xlarge instances concurrently for an hour.

As a Developer, explain how the instances are charged?

All instances are charged at one hour of On-Demand Instance usage

One instance is charged at one hour of Reserved Instance usage and the other two instances are charged at two hours of On-Demand usage

All instances are charged at one hour of Reserved Instance usage

One instance is charged at one hour of On-Demand usage and the other two instances are charged at two hours of Reserved Instance usage

Question 9:

After a code review, a developer has been asked to make his publicly accessible S3 buckets private, and enable access to objects with a time-bound constraint.

Which of the following options will address the given use-case?

Use Bucket policy to block the unintended access

Share pre-signed URLs with resources that need access

Use Routing policies to re-route unintended access

It is not possible to implement time constraints on Amazon S3 Bucket access

Question 10:

The development team at a retail company is gearing up for the upcoming Thanksgiving sale and wants to make sure that the application's serverless backend running via Lambda functions does not hit latency bottlenecks as a result of the traffic spike.

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

No need to make any special provisions as Lambda is automatically scalable because of its serverless nature

Configure Application Auto Scaling to manage Lambda reserved concurrency on a schedule

Configure Application Auto Scaling to manage Lambda provisioned concurrency on a schedule

Add an Application Load Balancer in front of the Lambda functions