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Free DBS-C01 Exam Braindumps
AWS Certified Database - Specialty Questions 146–150 (page: 31)

Updated On: 10-Feb-2026
Page 31 of 67
PDF with 359 Questions

An online advertising website uses an Amazon DynamoDB table with on-demand capacity mode as its data store. The website also has a DynamoDB Accelerator (DAX) cluster in the same VPC as its web application server. The application needs to perform infrequent writes and many strongly consistent reads from the data store by querying the DAX cluster.
During a performance audit, a systems administrator notices that the application can look up items by using the DAX cluster. However, the QueryCacheHits metric for the DAX cluster consistently shows 0 while the QueryCacheMisses metric continuously keeps growing in Amazon CloudWatch.
What is the MOST likely reason for this occurrence?

  1. A VPC endpoint was not added to access DynamoDB.
  2. Strongly consistent reads are always passed through DAX to DynamoD
  3. DynamoDB is scaling due to a burst in traffic, resulting in degraded performance.
  4. A VPC endpoint was not added to access CloudWatch.

Answer(s): B


Reference:

https://github.com/aws/aws-sdk-java/issues/1983



A financial company recently launched a portfolio management solution. The backend of the application is powered by Amazon Aurora with MySQL compatibility. The company requires an RTO of 5 minutes and an RPO of 5 minutes. A database specialist must configure an efficient disaster recovery solution with minimal replication lag.
Which approach should the database specialist take to meet these requirements?

  1. Configure AWS Database Migration Service (AWS DMS) and create a replica in a different AWS Region.
  2. Configure an Amazon Aurora global database and add a different AWS Region.
  3. Configure a binlog and create a replica in a different AWS Region.
  4. Configure a cross-Region read replica.

Answer(s): B



A company hosts an internal file-sharing application running on Amazon EC2 instances in VPC_A.
Thisapplication is backed by an Amazon ElastiCache cluster, which is in VPC_B and peered with VPC_A.
Thecompany migrates its application instances from VPC_A to VPC_B. Logs indicate that the file-sharing application no longer can connect to the ElastiCache cluster.
What should a database specialist do to resolve this issue?

  1. Create a second security group on the EC2 instances. Add an outbound rule to allow traffic from the ElastiCache cluster security group.
  2. Delete the ElastiCache security group. Add an interface VPC endpoint to enable the EC2 instances to connect to the ElastiCache cluster.
  3. Modify the ElastiCache security group by adding outbound rules that allow traffic to VPC_B’s CIDR blocks from the ElastiCache cluster.
  4. Modify the ElastiCache security group by adding an inbound rule that allows traffic from the EC2 instances security group to the ElastiCache cluster.

Answer(s): D



A database specialist must load 25 GB of data files from a company’s on-premises storage to an Amazon Neptune database.
Which approach to load the data is FASTEST?

  1. Upload the data to Amazon S3 and use the Loader command to load the data from Amazon S3 into the Neptune database.
  2. Write a utility to read the data from the on-premises storage and run INSERT statements in a loop to load the data into the Neptune database.
  3. Use the AWS CLI to load the data directly from the on-premises storage into the Neptune database.
  4. Use AWS DataSync to load the data directly from the on-premises storage into the Neptune database.

Answer(s): A


Reference:

https://docs.aws.amazon.com/neptune/latest/userguide/bulk-load.html



A finance company needs to make sure that its MySQL database backups are available for the most recent 90 days. All of the MySQL databases are hosted on Amazon RDS for MySQL DB instances. A database specialist must implement a solution that meets the backup retention requirement with the least possible development effort.
Which approach should the database specialist take?

  1. Use AWS Backup to build a backup plan for the required retention period. Assign the DB instances to the backup plan.
  2. Modify the DB instances to enable the automated backup option. Select the required backup retention period.
  3. Automate a daily cron job on an Amazon EC2 instance to create MySQL dumps, transfer to Amazon S3, and implement an S3 Lifecycle policy to meet the retention requirement.
  4. Use AWS Lambda to schedule a daily manual snapshot of the DB instances. Delete snapshots that exceed the retention requirement.

Answer(s): A



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