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Home Amazon AWS Certified Database - Specialty

Amazon AWS Certified Database - Specialty Exam Practice Questions (P. 3)

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Question #21
A company maintains several databases using Amazon RDS for MySQL and PostgreSQL. Each RDS database generates log files with retention periods set to their default values. The company has now mandated that database logs be maintained for up to 90 days in a centralized repository to facilitate real-time and after-the-fact analyses.
What should a Database Specialist do to meet these requirements with minimal effort?
  1. A
    Create an AWS Lambda function to pull logs from the RDS databases and consolidate the log files in an Amazon S3 bucket. Set a lifecycle policy to expire the objects after 90 days.
  2. B
    Modify the RDS databases to publish log to Amazon CloudWatch Logs. Change the log retention policy for each log group to expire the events after 90 days.
  3. C
    Write a stored procedure in each RDS database to download the logs and consolidate the log files in an Amazon S3 bucket. Set a lifecycle policy to expire the objects after 90 days.
  4. D
    Create an AWS Lambda function to download the logs from the RDS databases and publish the logs to Amazon CloudWatch Logs. Change the log retention policy for the log group to expire the events after 90 days.

Correct Answer:
A
chatbot-img GPT-4o - Answer
To address the requirement of maintaining database logs for 90 days in a centralized repository with minimal effort, using AWS Lambda to pull logs from Amazon RDS databases and store them in Amazon S3 is very practical. This method allows the logs to be consolidated in one location efficiently and with minimal manual intervention, supporting both real-time and analytic needs. A lifecycle policy on S3 to handle expiration after 90 days automates the process further, reducing maintenance overhead.

Question #22
A Database Specialist is setting up a new Amazon Aurora DB cluster with one primary instance and three Aurora Replicas for a highly intensive, business-critical application. The Aurora DB cluster has one medium-sized primary instance, one large-sized replica, and two medium sized replicas. The Database Specialist did not assign a promotion tier to the replicas.
In the event of a primary failure, what will occur?
  1. A
    Aurora will promote an Aurora Replica that is of the same size as the primary instance
  2. B
    Aurora will promote an arbitrary Aurora Replica
  3. C
    Aurora will promote the largest-sized Aurora Replica
  4. D
    Aurora will not promote an Aurora Replica

Correct Answer:
A
Reference:
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/aurora-ug.pdf

Question #23
A company is running its line of business application on AWS, which uses Amazon RDS for MySQL at the persistent data store. The company wants to minimize downtime when it migrates the database to Amazon Aurora.
Which migration method should a Database Specialist use?
  1. A
    Take a snapshot of the RDS for MySQL DB instance and create a new Aurora DB cluster with the option to migrate snapshots.
  2. B
    Make a backup of the RDS for MySQL DB instance using the mysqldump utility, create a new Aurora DB cluster, and restore the backup.
  3. C
    Create an Aurora Replica from the RDS for MySQL DB instance and promote the Aurora DB cluster.
  4. D
    Create a clone of the RDS for MySQL DB instance and promote the Aurora DB cluster.

Correct Answer:
A
Reference:
https://d1.awsstatic.com/whitepapers/RDS/Migrating%20your%20databases%20to%20Amazon%20Aurora.pdf
(10)

Question #24
The Security team for a finance company was notified of an internal security breach that happened 3 weeks ago. A Database Specialist must start producing audit logs out of the production Amazon Aurora PostgreSQL cluster for the Security team to use for monitoring and alerting. The Security team is required to perform real-time alerting and monitoring outside the Aurora DB cluster and wants to have the cluster push encrypted files to the chosen solution.
Which approach will meet these requirements?
  1. A
    Use pg_audit to generate audit logs and send the logs to the Security team.
  2. B
    Use AWS CloudTrail to audit the DB cluster and the Security team will get data from Amazon S3.
  3. C
    Set up database activity streams and connect the data stream from Amazon Kinesis to consumer applications.
  4. D
    Turn on verbose logging and set up a schedule for the logs to be dumped out for the Security team.

Correct Answer:
B
Reference:
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/aurora-ug.pdf
(525)

Question #25
A company is using Amazon RDS for MySQL to redesign its business application. A Database Specialist has noticed that the Development team is restoring their
MySQL database multiple times a day when Developers make mistakes in their schema updates. The Developers sometimes need to wait hours for the restores to complete.
Multiple team members are working on the project, making it difficult to find the correct restore point for each mistake.
Which approach should the Database Specialist take to reduce downtime?
  1. A
    Deploy multiple read replicas and have the team members make changes to separate replica instances
  2. B
    Migrate to Amazon RDS for SQL Server, take a snapshot, and restore from the snapshot
  3. C
    Migrate to Amazon Aurora MySQL and enable the Aurora Backtrack feature
  4. D
    Enable the Amazon RDS for MySQL Backtrack feature

Correct Answer:
A

Question #26
A media company is using Amazon RDS for PostgreSQL to store user data. The RDS DB instance currently has a publicly accessible setting enabled and is hosted in a public subnet. Following a recent AWS Well-Architected Framework review, a Database Specialist was given new security requirements.
✑ Only certain on-premises corporate network IPs should connect to the DB instance.
✑ Connectivity is allowed from the corporate network only.
Which combination of steps does the Database Specialist need to take to meet these new requirements? (Choose three.)
  1. A
    Modify the pg_hba.conf file. Add the required corporate network IPs and remove the unwanted IPs.
  2. B
    Modify the associated security group. Add the required corporate network IPs and remove the unwanted IPs.
  3. C
    Move the DB instance to a private subnet using AWS DMS.
  4. D
    Enable VPC peering between the application host running on the corporate network and the VPC associated with the DB instance.
  5. E
    Disable the publicly accessible setting.
  6. F
    Connect to the DB instance using private IPs and a VPN.

Correct Answer:
DEF

Question #27
A company is about to launch a new product, and test databases must be re-created from production data. The company runs its production databases on an
Amazon Aurora MySQL DB cluster. A Database Specialist needs to deploy a solution to create these test databases as quickly as possible with the least amount of administrative effort.
What should the Database Specialist do to meet these requirements?
  1. A
    Restore a snapshot from the production cluster into test clusters
  2. B
    Create logical dumps of the production cluster and restore them into new test clusters
  3. C
    Use database cloning to create clones of the production cluster
  4. D
    Add an additional read replica to the production cluster and use that node for testing

Correct Answer:
D

Question #28
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 Region. Create a new instance from the snapshot in the ap-southeast-1 Region. Reconfigure the ap- southeast-1 front-end dashboard to access this instance.
  2. B
    Create an RDS read replica in the ap-southeast-1 Region from the primary RDS DB instance in the us-west-2 Region. Reconfigure the ap-southeast-1 front- end dashboard to access this instance.
  3. C
    Create a new RDS instance in the ap-southeast-1 Region. Use AWS DMS and change data capture (CDC) to update the new instance in the ap-southeast-1 Region. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.
  4. D
    Create an RDS read replica in the us-west-2 Region where the primary instance resides. Create a read replica in the ap-southeast-1 Region from the read replica located on the us-west-2 Region. Reconfigure the ap-southeast-1 front-end dashboard to access this instance.

Correct Answer:
A

Question #29
A company wants to migrate its existing on-premises Oracle database to Amazon Aurora PostgreSQL. The migration must be completed with minimal downtime using AWS DMS. A Database Specialist must validate that the data was migrated accurately from the source to the target before the cutover. The migration must have minimal impact on the performance of the source database.
Which approach will MOST effectively meet these requirements?
  1. A
    Use the AWS Schema Conversion Tool (AWS SCT) to convert source Oracle database schemas to the target Aurora DB cluster. Verify the datatype of the columns.
  2. B
    Use the table metrics of the AWS DMS task created for migrating the data to verify the statistics for the tables being migrated and to verify that the data definition language (DDL) statements are completed.
  3. C
    Enable the AWS Schema Conversion Tool (AWS SCT) premigration validation and review the premigration checklist to make sure there are no issues with the conversion.
  4. D
    Enable AWS DMS data validation on the task so the AWS DMS task compares the source and target records, and reports any mismatches.

Correct Answer:
D
Reference:
https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Validating.html

Question #30
A company is planning to close for several days. A Database Specialist needs to stop all applications along with the DB instances to ensure employees do not have access to the systems during this time. All databases are running on Amazon RDS for MySQL.
The Database Specialist wrote and ran a script to stop all the DB instances. When reviewing the logs, the Database Specialist found that Amazon RDS DB instances with read replicas did not stop.
How should the Database Specialist edit the script to fix this issue?
  1. A
    Stop the source instances before stopping their read replicas
  2. B
    Delete each read replica before stopping its corresponding source instance
  3. C
    Stop the read replicas before stopping their source instances
  4. D
    Use the AWS CLI to stop each read replica and source instance at the same time

Correct Answer:
D

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