What is AWS Certified Database - Specialty (DBS-C01) Exam ?
The AWS Certified Database - Specialty Exam is a certification exam offered by Amazon Web Services (AWS) that validates an individual's expertise in designing, deploying, and maintaining AWS database solutions.
This exam is designed for individuals who have a deep understanding of database technologies and at least two years of experience with AWS. It covers a range of topics including database design, migration, deployment, management, security, monitoring, and troubleshooting.
To pass the exam, candidates must demonstrate their ability to design and implement secure, scalable, and high-performance databases on AWS, as well as troubleshoot common database issues and optimize database performance.
Achieving this certification can help individuals demonstrate their skills and knowledge to potential employers and enhance their career prospects in the cloud computing industry. Additionally, this certification can help database professionals differentiate themselves in the market and demonstrate their ability to design and manage advanced database solutions on the AWS platform.
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You can use the "practise exam" and "virtual exam" choices to review your DBS-C01 questions and answers and practise test questions. Test your knowledge by taking a virtual exam, which simulates the experience of taking exams at a Prometric or VUE testing facility. DBS-C01 Exam practise: go over each exam question individually and look at the justifications and correct solutions.
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Question 1
Recently, an ecommerce business transferred one of its SQL Server databases to anAmazon RDS for SQL Server Enterprise Edition database instance. The corporationanticipates an increase in read traffic as a result of an approaching sale. To accommodatethe projected read load, a database professional must establish a read replica of thedatabase instance.Which procedures should the database professional do prior to establishing the readreplica? (Select two.)
A. Identify a potential downtime window and stop the application calls to the source DBinstance.
B. Ensure that automatic backups are enabled for the source DB instance.
C. Ensure that the source DB instance is a Multi-AZ deployment with Always ONAvailability Groups.
D. Ensure that the source DB instance is a Multi-AZ deployment with SQL Server DatabaseMirroring (DBM).
E. Modify the read replica parameter group setting and set the value to 1.
Answer: B,C
Question 2
A database specialist is constructing an AWS CloudFormation stack using AWSCloudFormation. The database expert wishes to avoid the stack's Amazon RDSProductionDatabase resource being accidentally deleted.Which solution will satisfy this criterion?
A. Create a stack policy to prevent updates. Include €Effect€ : €ProductionDatabase€ and€Resource€ : €Deny€ in the policy.
B. Create an AWS CloudFormation stack in XML format. Set xAttribute as false.
C. Create an RDS DB instance without the DeletionPolicy attribute. Disable terminationprotection.
D. Create a stack policy to prevent updates. Include Effect, Deny, and Resource:ProductionDatabase in the policy.
Answer: D
Question 3
A small startup firm wishes to move a 4 TB MySQL database from on-premises to AWSthrough an Amazon RDS for MySQL DB instance.Which migration approach would result in the LEAST amount of downtime?
A. Deploy a new RDS for MySQL DB instance and configure it for access from the onpremises data center. Use the mysqldump utility to create an initial snapshot from the onpremises MySQL server, and copy it to an Amazon S3 bucket. Import the snapshot into theDB instance utilizing the MySQL utilities running on an Amazon EC2 instance. Immediatelypoint the application to the DB instance.
B. Deploy a new Amazon EC2 instance, install the MySQL software on the EC2 instance,and configure networking for access from the on-premises data center. Use the mysqldumputility to create a snapshot of the on-premises MySQL server. Copy the snapshot into theEC2 instance and restore it into the EC2 MySQL instance. Use AWS DMS to migrate datainto a new RDS for MySQL DB instance. Point the application to the DB instance.
C. Deploy a new Amazon EC2 instance, install the MySQL software on the EC2 instance,and configure networking for access from the on-premises data center. Use the mysqldumputility to create a snapshot of the on-premises MySQL server. Copy the snapshot into anAmazon S3 bucket and import the snapshot into a new RDS for MySQL DB instance usingthe MySQL utilities running on an EC2 instance. Point the application to the DB instance.
D. Deploy a new RDS for MySQL DB instance and configure it for access from the onpremises data center. Use the mysqldump utility to create an initial snapshot from the onpremises MySQL server, and copy it to an Amazon S3 bucket. Import the snapshot into theDB instance using the MySQL utilities running on an Amazon EC2 instance. Establishreplication into the new DB instance using MySQL replication. Stop application access tothe on-premises MySQL server and let the remaining transactions replicate over. Point theapplication to the DB instance.
Answer: D
Question 4
A company needs to migrate Oracle Database Standard Edition running on an AmazonEC2 instance to an Amazon RDS for Oracle DB instance with Multi-AZ. The databasesupports an ecommerce website that runs continuously. The company can only provide amaintenance window of up to 5 minutes.Which solution will meet these requirements?
A. Configure Oracle Real Application Clusters (RAC) on the EC2 instance and the RDS DBinstance. Update the connection string to point to the RAC cluster. Once the EC2 instanceand RDS DB instance are in sync, fail over from Amazon EC2 to Amazon RDS.
B. Export the Oracle database from the EC2 instance using Oracle Data Pump andperform an import into Amazon RDS. Stop the application for the entire process. When theimport is complete, change the database connection string and then restart the application.
C. Configure AWS DMS with the EC2 instance as the source and the RDS DB instance asthe destination. Stop the application when the replication is in sync, change the databaseconnection string, and then restart the application.
D. Configure AWS DataSync with the EC2 instance as the source and the RDS DBinstance as the destination. Stop the application when the replication is in sync, change thedatabase connection string, and then restart the application.
Answer: C
Question 5
An worldwide gaming company's development team is experimenting with using AmazonDynamoDB to store in-game events for three mobile titles. Maximum concurrent users forthe most popular game is 500,000, while the least popular game is 10,000. The typicalevent is 20 KB in size, while the average user session generates one event each second.Each event is assigned a millisecond time stamp and a globally unique identification.The lead developer generated a single DynamoDB database with the following structure forthe events:Partition key: game nameSort key: event identifierLocal secondary index: player identifierEvent timeIn a small-scale development setting, the tests were successful. When the application wasdeployed to production, however, new events were not being added to the database, andthe logs indicated DynamoDB failures with the ItemCollectionSizeLimitExceededExceptionissue code.Which design modification should a database professional offer to the development team?
A. Use the player identifier as the partition key. Use the event time as the sort key. Add aglobal secondary index with the game name as the partition key and the event time as thesort key.
B. Create two tables. Use the game name as the partition key in both tables. Use the eventtime as the sort key for the first table. Use the player identifier as the sort key for thesecond table.
C. Replace the sort key with a compound value consisting of the player identifier collatedwith the event time, separated by a dash. Add a local secondary index with the playeridentifier as the sort key.
D. Create one table for each game. Use the player identifier as the partition key. Use theevent time as the sort key.
Answer: D
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