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Amazon Web Services DVA-C01 Exam Dumps - Actual Questions Answers

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DVA-C01 Questions and Answers

Question # 1

A company is migrating its on-premises database to Amazon RDS for MySQL. The company has read-heavy workloads, and wants to make sure it re-factors its code to achieve optimum read performance for its queries.

How can this objective be met?

A.

Add database retries to effectively use RDS with vertical scaling

B.

Use RDS with multi-AZ deployment

C.

Add a connection string to use an RDS read replica for read queries

D.

Add a connection string to use a read replica on an EC2 instance.

Question # 2

Games-R-Us is launching a new game app for mobile devices. Users will log into the game using their existing Facebook account and the game will record player data and scoring information directly to a DynamoDB table.

What is the most secure approach for signing requests to the DynamoDB API?

A.

Create an IAM user with access credentials that are distributed with the mobile app to sign the requests

B.

Distribute the AWS root account access credentials with the mobile app to sign the requests

C.

Request temporary security credentials using web identity federation to sign the requests

D.

Establish cross account access between the mobile app and the DynamoDB table to sign the requests

Question # 3

During non-peak hours, a Developer wants to minimize the execution time of a full Amazon DynamoDB table scan without affecting normal workloads. The workloads average half of the strongly consistent read capacity units during non-peak hours.

How would the Developer optimize this scan?

A.

Use parallel scans while limiting the rate

B.

Use sequential scans

C.

Increase read capacity units during the scan operation

D.

Change consistency to eventually consistent during the scan operation

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