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Amazon Web Services Updated DBS-C01 Exam Questions and Answers by boden

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Amazon Web Services DBS-C01 Exam Overview :

Exam Name: AWS Certified Database - Specialty
Exam Code: DBS-C01 Dumps
Vendor: Amazon Web Services Certification: AWS Certified Database
Questions: 324 Q&A's Shared By: boden
Question 28

On AWS, a business is developing a web application. The application needs that the database supports concurrent read and write activities in several AWS Regions. Additionally, the database must communicate data changes across Regions as they occur. The application must be highly available and have a latency of less than a few hundred milliseconds.

Which solution satisfies these criteria?

Options:

A.

Amazon DynamoDB global tables

B.

Amazon DynamoDB streams with AWS Lambda to replicate the data

C.

An Amazon ElastiCache for Redis cluster with cluster mode enabled and multiple shards

D.

An Amazon Aurora global database

Discussion
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Question 29

A company has a heterogeneous six-node production Amazon Aurora DB cluster that handles online transaction processing (OLTP) for the core business and OLAP reports for the human resources department. To match compute resources to the use case, the company has decided to have the reporting workload for the human resources department be directed to two small nodes in the Aurora DB cluster, while every other workload goes to four large nodes in the same DB cluster.

Which option would ensure that the correct nodes are always available for the appropriate workload while meeting these requirements?

Options:

A.

Use the writer endpoint for OLTP and the reader endpoint for the OLAP reporting workload.

B.

Use automatic scaling for the Aurora Replica to have the appropriate number of replicas for the desired workload.

C.

Create additional readers to cater to the different scenarios.

D.

Use custom endpoints to satisfy the different workloads.

Discussion
Question 30

A company has an application environment that deploys Amazon Aurora PostgreSQL databases as part of its CI/CD process that uses AWS CloudFormatlon. The company's database administrator has received reports of performance Issues from the resulting database but has no way to investigate the issues.

Which combination of changes must the database administrator make to the database deployment to automate the collection of performance data? (Select TWO.)

Options:

A.

Turn on Amazon DevOps Guru for the Aurora database resources in the CloudFormat10n template.

B.

Turn on AWS CloudTraiI in each AWS account_

C.

Turn on and contigure AWS Config tor all Aurora PostgreSQL databases.

D.

Update the CloudFormatlon template to enable Amazon CloudWatch monitoring on the Aurora PostgreSQL DB instances.

E.

Update the CloudFormatlon template to turn on Performance Insights for Aurora PostgreSQL.

Discussion
Question 31

A company has deployed an e-commerce web application in a new AWS account. An Amazon RDS for MySQL Multi-AZ DB instance is part of this deployment with a database-1.xxxxxxxxxxxx.us-east- 1.rds.amazonaws.com endpoint listening on port 3306. The company’s Database Specialist is able to log in to MySQL and run queries from the bastion host using these details.

When users try to utilize the application hosted in the AWS account, they are presented with a generic error message. The application servers are logging a “could not connect to server: Connection times out” error message to Amazon CloudWatch Logs.

What is the cause of this error?

Options:

A.

The user name and password the application is using are incorrect.

B.

The security group assigned to the application servers does not have the necessary rules to allow inbound connections from the DB instance.

C.

The security group assigned to the DB instance does not have the necessary rules to allow inbound connections from the application servers.

D.

The user name and password are correct, but the user is not authorized to use the DB instance.

Discussion
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