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Amazon AWS Certified Database - Specialty (DBS-C01) Exam Sample Questions (Q231-Q236):
NEW QUESTION # 231
A database specialist manages a critical Amazon RDS for MySQL DB instance for a company. The data stored daily could vary from .01% to 10% of the current database size. The database specialist needs to ensure that the DB instance storage grows as needed.
What is the MOST operationally efficient and cost-effective solution?
- A. Modify the DB instance allocated storage to meet the forecasted requirements.
- B. Configure RDS instance Auto Scaling.
- C. Monitor the Amazon CloudWatch FreeStorageSpace metric daily and add storage as required.
- D. Configure RDS Storage Auto Scaling.
Answer: D
Explanation:
If your workload is unpredictable, you can enable storage autoscaling for an Amazon RDS DB instance. With storage autoscaling enabled, when Amazon RDS detects that you are running out of free database space it automatically scales up your storage. https://aws.amazon.com/about-aws/whats-new/2019/06/rds-storage-auto-scaling/
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_PIOPS.StorageTypes.html#USER_PIOPS.Autoscaling
NEW QUESTION # 232
A company has an ecommerce web application with an Amazon RDS for MySQL DB instance. The marketing team has noticed some unexpected updates to the product and pricing information on the website, which is impacting sales targets. The marketing team wants a database specialist to audit future database activity to help identify how and when the changes are being made.
What should the database specialist do to meet these requirements? (Choose two.)
- A. Create an RDS event subscription to the audit event type.
- B. Enable auditing of CONNECT and QUERY_DML events.
- C. Enable Enhanced Monitoring on the DB instance.
- D. SSH to the DB instance and review the database logs.
- E. Publish the database logs to Amazon CloudWatch Logs.
Answer: B,E
Explanation:
https://aws.amazon.com/blogs/database/configuring-an-audit-log-to-capture-database-activities-for-amazon-rds-for-mysql-and-amazon-aurora-with-mysql-compatibility/
NEW QUESTION # 233
A business uses Amazon EC2 instances in VPC A to serve an internal file-sharing application. This application is supported by an Amazon ElastiCache cluster in VPC B that is peering with VPC A.
The corporation migrates the instances of its applications from VPC A to VPC B.
The file-sharing application is no longer able to connect to the ElastiCache cluster, as shown by the logs.
What is the best course of action for a database professional to take in order to remedy this issue?
- A. Modify the ElastiCache security group by adding an inbound rule that allows traffic from the EC2 instances security group to the ElastiCache cluster.
- B. Modify the ElastiCache security group by adding outbound rules that allow traffic to VPC CIDR blocks from the ElastiCache cluster.
- C. Delete the ElastiCache security group. Add an interface VPC endpoint to enable the EC2 instances to connect to the ElastiCache cluster.
- D. Create a second security group on the EC2 instances. Add an outbound rule to allow traffic from the ElastiCache cluster security group.
Answer: A
Explanation:
Explanation
https://docs.aws.amazon.com/vpc/latest/peering/vpc-peering-security-groups.html
NEW QUESTION # 234
A company has a web-based survey application that uses Amazon DynamoDB. During peak usage, when survey responses are being collected, a Database Specialist sees the ProvisionedThroughputExceededException error.
What can the Database Specialist do to resolve this error? (Choose two.)
- A. Increase the write capacity units for the specific table
- B. Purchase DynamoDB reserved capacity in the affected Region
- C. Change the table type to throughput optimized
- D. Change the table capacity mode to on-demand
- E. Change the table to use Amazon DynamoDB Streams
Answer: A,D
Explanation:
Explanation
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/switching.capacitymode.html
NEW QUESTION # 235
A company is writing a new survey application to be used with a weekly televised game show. The application will be available for 2 hours each week. The company expects to receive over 500,000 entries every week, with each survey asking 2-3 multiple choice questions of each user. A Database Specialist needs to select a platform that is highly scalable for a large number of concurrent writes to handle he anticipated volume.
Which AWS services should the Database Specialist consider? (Choose two.)
- A. Amazon DynamoDB
- B. Amazon Neptune
- C. Amazon Redshift
- D. Amazon ElastiCache
- E. Amazon Elasticsearch Service
Answer: A,D
Explanation:
https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/Strategies.html#Strategies.WriteThrough
https://aws.amazon.com/products/databases/real-time-apps-elasticache-for-redis/
NEW QUESTION # 236
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