Free Amazon DVA-C02 Exam Questions

Question 1

A company ' s application uses an Amazon API Gateway REST API and AWS Lambda functions to uploadmedia files to and fetch media files from a standard Amazon S3 Standard bucket. The company runs a nightlyjob on an Amazon EC2 instance to create dashboards and other visualizations for application users. The jobusually runs for 1 to 2 hours.A developer observes request throttling while the function is running. The application generates multiple 429exceptions in the Lambda function logs when files do not process successfully. The developer needs toresolve the issue and ensure that all of the application ingests all files.Which solution will meet these requirements?

A : Enable S3 Transfer Acceleration on the bucket. Use the appropriate endpoint.

B : Call the CreateMultipartUpload API in the Lambda functions to upload the files in pieces.

C : Implement the retry with a backoff pattern in the Lambda functions.

D : Set up an S3 Lifecycle policy to automatically move the media files to the S3 Intelligent-Tiering storageclass.

Answer: C

Question 2

A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from https://www.example.com. After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets. To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts. What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?

A : Create four access points that allow access to the central S3 bucket. Assign an access point to each web application bucket.

B : Create a bucket policy that allows access to the central S3 bucket. Attach the bucket policy to the central S3 bucket.

C : Create a cross-origin resource sharing (CORS) configuration that allows access to the central S3 bucket. Add the CORS configuration to the central S3 bucket.

D : Create a Content-MD5 header that provides a message integrity check for the central S3 bucket. Insert the Content-MD5 header for each web application request.

Answer: C

Question 3

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 4

A company has an online order website that uses Amazon DynamoDB to store item inventory. A sample ofthe inventory object is as follows:Id: 456Price: 650Product.Category: " Sporting Goods "A developer needs to reduce all inventory prices by 100 as long as the resulting price would not be less than500.What should the developer do to make this change with the LEAST number of calls to DynamoDB?

A : Perform a DynamoDB Query operation with the Id. If the price is > = 600, perform an UpdateItemoperation to update the price.

B : Perform a DynamoDB UpdateItem operation with a condition expression of Price > = 600.

C : Perform a DynamoDB UpdateItem operation with a condition expression of Product.Category IN ( "Sporting Goods " ) AND Price > = 600.

D : Perform a DynamoDB UpdateItem operation with a condition expression of Price - 100 > = 500.

Answer: B

Question 5

A company wants to use AWS AppConfig to gradually deploy a new feature to 15% of users to test the feature before a full deployment. Which solution will meet this requirement with the LEAST operational overhead?

A : Set up a custom script within the application to randomly select 15% of users. Assign a flag for the new feature to the selected users.

B : Create separate AWS AppConfig feature flags for both groups of users. Configure the flags to target 15% of users.

C : Create an AWS AppConfig feature flag. Define a variant for the new feature, and create a rule to target 15% of users.

D : Use AWS AppConfig to create a feature flag without variants. Implement a custom traffic splitting mechanism in the application code.

Answer: C