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To be eligible for the AWS Certified Database - Specialty certification exam, candidates must have at least five years of experience in database technologies, including two years of experience working with AWS. Additionally, candidates must have a strong understanding of database concepts, such as relational and NoSQL databases, and must be familiar with database design patterns and best practices.

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Amazon DBS-C01: AWS Certified Database - Specialty (DBS-C01) exam is a certification that validates the skills and knowledge of professionals who are experts in designing and managing AWS databases. AWS Certified Database - Specialty (DBS-C01) Exam certification is intended for individuals who have experience in database technologies, including database implementation, management, migration, and monitoring. The DBS-C01 exam is the perfect way for professionals to validate their skills in the rapidly growing field of cloud computing.

Amazon AWS Certified Database - Specialty (DBS-C01) Exam Sample Questions (Q255-Q260):

NEW QUESTION # 255
A company wants to improve its ecommerce website on AWS. A database specialist decides to add Amazon ElastiCache for Redis in the implementation stack to ease the workload off the database and shorten the website response times. The database specialist must also ensure the ecommerce website is highly available within the company's AWS Region.
How should the database specialist deploy ElastiCache to meet this requirement?

A. Launch an ElastiCache for Redis cluster using the AWS CLI with the -cluster-enabled switch.B. Launch two ElastiCache for Redis clusters in two different Availability Zones. Configure Redis streams to replicate the cache from the primary cluster to another.C. Launch an ElastiCache cluster in the primary Availability Zone and restore the cluster's snapshot to a different Availability Zone during disaster recovery.D. Launch an ElastiCache for Redis cluster and select read replicas in different Availability Zones.

Answer: D

Explanation:
https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/AutoFailover.html You can enable Multi-AZ only on Redis (cluster mode disabled) clusters that have at least one available read replica. Clusters without read replicas do not provide high availability or fault tolerance.

NEW QUESTION # 256
A company is running a website on Amazon EC2 instances deployed in multiple Availability Zones (AZs). The site performs a high number of repetitive reads and writes each second on an Amazon RDS for MySQL Multi- AZ DB instance with General Purpose SSD (gp2) storage. After comprehensive testing and analysis, a database specialist discovers that there is high read latency and high CPU utilization on the DB instance.
Which approach should the database specialist to take to resolve this issue without changing the application?

A. Modify the RDS for MySQL database class to a bigger size and implement Provisioned IOPS (PIOPS).B. Use the same RDS for MySQL instance class with Provisioned IOPS (PIOPS) storage.C. Add an RDS for MySQL read replica.D. Implementing sharding to distribute the load to multiple RDS for MySQL databases.

Answer: A

NEW QUESTION # 257
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?

A. Amazon DynamoDB global tablesB. An Amazon ElastiCache for Redis cluster with cluster mode enabled and multiple shardsC. Amazon DynamoDB streams with AWS Lambda to replicate the dataD. An Amazon Aurora global database

Answer: A

Explanation:
Aurora Global Databases provides a writer and a reader endpoints in the primary region but only a reader endpoints in other region. Although strongly consistent, it does not fulfill the requirements that "there are plenty of read / write activities" in all regions.

NEW QUESTION # 258
A company is running an Amazon RDS for MySQL Multi-AZ DB instance for a business-critical workload. RDS encryption for the DB instance is disabled. A recent security audit concluded that all business-critical applications must encrypt data at rest. The company has asked its database specialist to formulate a plan to accomplish this for the DB instance.
Which process should the database specialist recommend?

A. Create a snapshot of the unencrypted DB instance. Create an encrypted copy of the snapshot. Restore the DB instance from the encrypted snapshot.B. Create a new RDS for MySQL DB instance with encryption enabled. Restore the unencrypted snapshot to this DB instance.C. Create an encrypted snapshot of the unencrypted DB instance. Copy the encrypted snapshot to Amazon S3. Restore the DB instance from the encrypted snapshot using Amazon S3.D. Temporarily shut down the unencrypted DB instance. Enable AWS KMS encryption in the AWS Management Console using an AWS managed CMK. Restart the DB instance in an encrypted state.

Answer: A

NEW QUESTION # 259
A Database Specialist migrated an existing production MySQL database from on-premises to an Amazon RDS for MySQL DB instance. However, after the migration, the database needed to be encrypted at rest using AWS KMS. Due to the size of the database, reloading, the data into an encrypted database would be too time- consuming, so it is not an option.
How should the Database Specialist satisfy this new requirement?

A. Create a snapshot of the unencrypted RDS DB instance. Create an encrypted copy of the unencrypted snapshot. Restore the encrypted snapshot copy.B. Restore an unencrypted snapshot into a MySQL RDS DB instance that is encrypted.C. Modify the RDS DB instance. Enable the AWS KMS encryption option that leverages the AWS CLI.D. Create an encrypted read replica of the RDS DB instance. Promote it the master.

Answer: A

Explanation:
"However, because you can encrypt a copy of an unencrypted DB snapshot, you can effectively add encryption to an unencrypted DB instance. That is, you can create a snapshot of your DB instance, and then create an encrypted copy of that snapshot. You can then restore a DB instance from the encrypted snapshot, and thus you have an encrypted copy of your original DB instance. For more information, see Copying a Snapshot." https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.Encryption.html

NEW QUESTION # 260
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