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Earning the Amazon DBS-C01 certification is a significant achievement for database professionals who want to advance their career in the field. It demonstrates a deep understanding of AWS database services and validates the candidate's expertise in database design, deployment, migration, and management on AWS.

Amazon AWS Certified Database - Specialty (DBS-C01) Exam Sample Questions (Q88-Q93):

NEW QUESTION # 88
A software development company is using Amazon Aurora MySQL DB clusters for several use cases, including development and reporting. These use cases place unpredictable and varying demands on the Aurora DB clusters, and can cause momentary spikes in latency. System users run ad-hoc queries sporadically throughout the week. Cost is a primary concern for the company, and a solution that does not require significant rework is needed.
Which solution meets these requirements?

A. Create new Aurora Serverless DB clusters for development and reporting, then migrate to these new DB clusters.
B. Upgrade one of the DB clusters to a larger size, and consolidate development and reporting activities on this larger DB cluster.
C. Change the DB clusters to the burstable instance family.
D. Use existing DB clusters and stop/start the databases on a routine basis using scheduling tools.

Answer: A

Explanation:
Explanation
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Concepts.DBInstanceClass.html

NEW QUESTION # 89
A company's database specialist is building an Amazon RDS for Microsoft SQL Server DB instance to store hundreds of records in CSV format. A customer service tool uploads the records to an Amazon S3 bucket.
An employee who previously worked at the company already created a custom stored procedure to map the necessary CSV fields to the database tables. The database specialist needs to implement a solution that reuses this previous work and minimizes operational overhead.
Which solution will meet these requirements?

A. Create an Amazon S3 event to invoke an AWS Lambda function. Configure the Lambda function to parse the .csv file and use a SQL client library to run INSERT statements to load the data into the tables.
B. Download the .csv file from Amazon S3 to the RDS D drive by using an AWS msdb stored procedure. Call the custom stored procedure to insert the data from the RDS D drive into the tables.
C. Create an Amazon S3 event to invoke AWS Step Functions to parse the .csv file and call the custom stored procedure to insert the data into the tables.
D. Write a custom .NET app that is hosted on Amazon EC2. Configure the .NET app to load the .csv file and call the custom stored procedure to insert the data into the tables.

Answer: B

Explanation:
Step 1: Download S3 Files
Amazon RDS for SQL Server comes with several custom stored procedures and functions. These are located in the msdb database. The stored procedure to download files from S3 is "rds_download_from_s3". The syntax for this stored procedure is shown here:
exec msdb.dbo.rds_download_from_s3
@s3_arn_of_file='arn:aws:s3:::<bucket_name>/<file_name>',
@rds_file_path='D:\S3\<custom_folder_name>\<file_name>',
@overwrite_file=1;

NEW QUESTION # 90
A global digital advertising company captures browsing metadata to contextually display relevant images,pages, and links to targeted users. A single page load can generate multiple events that need to be storedindividually. The maximum size of an event is 200 KB and the average size is 10 KB. Each page load mustquery the user's browsing history to provide targeting recommendations. The advertising company expectsover 1 billion page visits per day from users in the United States, Europe, Hong Kong, and India. The structureof the metadata varies depending on the event. Additionally, the browsing metadata must be written and readwith very low latency to ensure a good viewing experience for the users.
Which database solution meets these requirements?

A. Amazon RDS Multi-AZ deployment
B. Amazon DocumentDB
C. Amazon DynamoDB global table
D. Amazon Aurora Global Database

Answer: C

NEW QUESTION # 91
A Database Specialist must create a read replica to isolate read-only queries for an Amazon RDS for MySQL DB instance. Immediately after creating the read replica, users that query it report slow response times.
What could be causing these slow response times?

A. New volumes created from snapshots load lazily in the background
B. Insufficient resources on the master
C. Long-running statements on the master
D. Overload of a single replication thread by excessive writes on the master

Answer: A

Explanation:
snapshot is lazy loaded If the volume is accessed where the data is not loaded, the application accessing the volume encounters a higher latency than normal while the data gets loaded
https://aws.amazon.com/about-aws/whats-new/2019/11/amazon-ebs-fast-snapshot-restore-eliminates-need-for-prewarming-data-into-volumes-created-snapshots/

NEW QUESTION # 92
A business maintains a SQL Server database on-premises. Active Directory authentication is used to provide users access to the database. The organization transferred their database successfully to Amazon RDS for SQL Server. The organization, however, has reservations regarding user authentication in the AWS Cloud environment.
Which authentication solution should a database professional provide?

A. Establish a forest trust between the on-premises Active Directory and AWS Directory Service for Microsoft Active Directory. Ensure RDS for SQL Server is using mixed mode authentication. Use the RDS master user credentials to connect to the DB instance and configure SQL Server logins and users from the Active Directory users and groups.
B. Establish a forest trust between the on-premises Active Directory and AWS Directory Service for Microsoft Active Directory. Use AWS SSO to configure an Active Directory user delegated to access the databases in RDS for SQL Server.
C. Use Active Directory Connector to redirect directory requests to the company's on-premises Active Directory without caching any information in the cloud. Use the RDS master user credentials to connect to the DB instance and configure SQL Server logins and users from the Active Directory users and groups.
D. Deploy Active Directory Federation Services (AD FS) on premises and configure it with an on-premises Active Directory. Set up delegation between the on- premises AD FS and AWS Security Token Service (AWS STS) to map user identities to a role using theAmazonRDSDirectoryServiceAccess managed IAM policy.

Answer: A

Explanation:
Explanation
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_SQLServerWinAuth.html

NEW QUESTION # 93
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