DBS-C01 Free Practice Test

A gaming company has recently acquired a successful iOS game, which is particularly popular during theholiday season. The company has decided to add a leaderboard to the game that uses Amazon DynamoDB.The application load is expected to ramp up over the holiday season.
Which solution will meet these requirements at the lowest cost?

1. A. DynamoDB Streams
2. B. DynamoDB with DynamoDB Accelerator
3. C. DynamoDB with on-demand capacity mode
4. D. DynamoDB with provisioned capacity mode with Auto Scaling

Correct Answer: C

An IT consulting company wants to reduce costs when operating its development environment databases. The company’s workflow creates multiple Amazon Aurora MySQL DB clusters for each development group. The Aurora DB clusters are only used for 8 hours a day. The DB clusters can then be deleted at the end of the development cycle, which lasts 2 weeks.
Which of the following provides the MOST cost-effective solution?

1. A. Use AWS CloudFormation template
2. B. Deploy a stack with the DB cluster for each development group.Delete the stack at the end of the development cycle.
3. C. Use the Aurora DB cloning featur
4. D. Deploy a single development and test Aurora DB instance, and createclone instances for the development group
5. E. Delete the clones at the end of the development cycle.
6. F. Use Aurora Replica
7. G. From the master automatic pause compute capacity option, create replicas for eachdevelopment group, and promote each replica to maste
8. H. Delete the replicas at the end of the developmentcycle.
9. I. Use Aurora Serverles
10. J. Restore current Aurora snapshot and deploy to a serverless cluster for eachdevelopment grou
11. K. Enable the option to pause the compute capacity on the cluster and set an appropriatetimeout.

Correct Answer: D

A company with branch offices in Portland, New York, and Singapore has a three-tier web application that leverages a shared database. The database runs on Amazon RDS for MySQL and is hosted in the us-west-2 Region. The application has a distributed front end deployed in the us-west-2, ap-southheast-1, and us-east-2 Regions.
This front end is used as a dashboard for Sales Managers in each branch office to see current sales statistics. There are complaints that the dashboard performs more slowly in the Singapore location than it does in Portland or New York. A solution is needed to provide consistent performance for all users in each location.
Which set of actions will meet these requirements?

1. A. Take a snapshot of the instance in the us-west-2 Regio
2. B. Create a new instance from the snapshot in the ap-southeast-1 Regio
3. C. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.
4. D. Create an RDS read replica in the ap-southeast-1 Region from the primary RDS DB instance in the uswest- 2 Regio
5. E. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.
6. F. Create a new RDS instance in the ap-southeast-1 Regio
7. G. Use AWS DMS and change data capture (CDC) to update the new instance in the ap-southeast-1 Regio
8. H. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.
9. I. Create an RDS read replica in the us-west-2 Region where the primary instance reside
10. J. Create a read replica in the ap-southeast-1 Region from the read replica located on the us-west-2 Regio
11. K. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.

Correct Answer: A

A large company is using an Amazon RDS for Oracle Multi-AZ DB instance with a Java application. As a part of its disaster recovery annual testing, the company would like to simulate an Availability Zone failure and record how the application reacts during the DB instance failover activity. The company does not want to make any code changes for this activity.
What should the company do to achieve this in the shortest amount of time?

1. A. Use a blue-green deployment with a complete application-level failover test
2. B. Use the RDS console to reboot the DB instance by choosing the option to reboot with failover
3. C. Use RDS fault injection queries to simulate the primary node failure
4. D. Add a rule to the NACL to deny all traffic on the subnets associated with a single Availability Zone

Correct Answer: C

An online gaming company is planning to launch a new game with Amazon DynamoDB as its data store. The database should be designated to support the following use cases:
< > >< > >A Database Specialist decides to implement a DynamoDB table. Each player has a unique user_id and each game has a unique game_id.
Which choice of keys is recommended for the DynamoDB table?

1. A. Create a global secondary index with game_id as the partition key
2. B. Create a global secondary index with user_id as the partition key
3. C. Create a composite primary key with game_id as the partition key and user_id as the sort key
4. D. Create a composite primary key with user_id as the partition key and game_id as the sort key

Correct Answer: B