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  • Exam Name: AWS Certified Database - Specialty
  • Last Update: 18-May-2022
  • Questions and Answers: 198
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DBS-C01 Questions and Answers

Question # 1

A Database Specialist modified an existing parameter group currently associated with a production Amazon RDS for SQL Server Multi-AZ DB instance. The change is associated with a static parameter type, which controls the number of user connections allowed on the most critical RDS SQL Server DB instance for the company. This change has been approved for a specific maintenance window to help minimize the impact on users.

How should the Database Specialist apply the parameter group change for the DB instance?

A.

Select the option to apply the change immediately

B.

Allow the preconfigured RDS maintenance window for the given DB instance to control when the change is applied

C.

Apply the change manually by rebooting the DB instance during the approved maintenance window

D.

Reboot the secondary Multi-AZ DB instance

Question # 2

An ecommerce company is using Amazon DynamoDB as the backend for its order-processing application. The

steady increase in the number of orders is resulting in increased DynamoDB costs. Order verification and reporting perform many repeated GetItem functions that pull similar datasets, and this read activity is contributing to the increased costs. The company wants to control these costs without significant development efforts.

How should a Database Specialist address these requirements?

A.

Use AWS DMS to migrate data from DynamoDB to Amazon DocumentDB

B.

Use Amazon DynamoDB Streams and Amazon Kinesis Data Firehose to push the data into Amazon Redshift

C.

Use an Amazon ElastiCache for Redis in front of DynamoDB to boost read performance

D.

Use DynamoDB Accelerator to offload the reads

Question # 3

A Database Specialist has migrated an on-premises Oracle database to Amazon Aurora PostgreSQL. The schema and the data have been migrated successfully. The on-premises database server was also being used to run database maintenance cron jobs written in Python to perform tasks including data purging and generating data exports. The logs for these jobs show that, most of the time, the jobs completed within 5 minutes, but a few jobs took up to 10 minutes to complete. These maintenance jobs need to be set up for Aurora PostgreSQL.

How can the Database Specialist schedule these jobs so the setup requires minimal maintenance and provides high availability?

A.

Create cron jobs on an Amazon EC2 instance to run the maintenance jobs following the required schedule.

B.

Connect to the Aurora host and create cron jobs to run the maintenance jobs following the required schedule.

C.

Create AWS Lambda functions to run the maintenance jobs and schedule them with Amazon CloudWatch Events.

D.

Create the maintenance job using the Amazon CloudWatch job scheduling plugin.

Question # 4

A company has a database monitoring solution that uses Amazon CloudWatch for its Amazon RDS for SQL Server environment. The cause of a recent spike in CPU utilization was not determined using the standard metrics that were collected. The CPU spike caused the application to perform poorly, impacting users. A Database Specialist needs to determine what caused the CPU spike.

Which combination of steps should be taken to provide more visibility into the processes and queries running during an increase in CPU load? (Choose two.)

A.

Enable Amazon CloudWatch Events and view the incoming T-SQL statements causing the CPU to spike.

B.

Enable Enhanced Monitoring metrics to view CPU utilization at the RDS SQL Server DB instance level.

C.

Implement a caching layer to help with repeated queries on the RDS SQL Server DB instance.

D.

Use Amazon QuickSight to view the SQL statement being run.

E.

Enable Amazon RDS Performance Insights to view the database load and filter the load by waits, SQL statements, hosts, or users.

Question # 5

A company has an Amazon RDS Multi-AZ DB instances that is 200 GB in size with an RPO of 6 hours. To meet the company’s disaster recovery policies, the database backup needs to be copied into another Region. The company requires the solution to be cost-effective and operationally efficient.

What should a Database Specialist do to copy the database backup into a different Region?

A.

Use Amazon RDS automated snapshots and use AWS Lambda to copy the snapshot into another Region

B.

Use Amazon RDS automated snapshots every 6 hours and use Amazon S3 cross-Region replication to copy the snapshot into another Region

C.

Create an AWS Lambda function to take an Amazon RDS snapshot every 6 hours and use a second Lambda function to copy the snapshot into another Region

D.

Create a cross-Region read replica for Amazon RDS in another Region and take an automated snapshot of the read replica

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