QUESTION: 113

A company uses Amazon DynamoDB as the data store for its ecommerce website. The website receives little to no traffic at night, and the majority of the traffic occurs during the day. The traffic growth during peak hours is gradual and predictable on a daily basis, but it can be orders of magnitude higher than during off-peak hours.

The company initially provisioned capacity based on its average volume during the day without accounting for the variability in traffic patterns. However, the website is experiencing a significant amount of throttling during peak hours. The company wants to reduce the amount of throttling while minimizing costs.

What should a database specialist do to meet these requirements?

Use reserved capacity. Set it to the capacity levels required for peak daytime throughput.
Use provisioned capacity. Set it to the capacity levels required for peak daytime throughput.
Use provisioned capacity. Create an AWS Application Auto Scaling policy to update capacity based on consumption.
Use on-demand capacity.

Answer(s): C

Reference:

https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ReadWriteCapacityMode.html

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QUESTION: 114

A company uses an Amazon RDS for PostgreSQL DB instance for its customer relationship management (CRM) system. New compliance requirements specify that the database must be encrypted at rest.

Which action will meet these requirements?

Create an encrypted copy of manual snapshot of the DB instance. Restore a new DB instance from the encrypted snapshot.
Modify the DB instance and enable encryption.
Restore a DB instance from the most recent automated snapshot and enable encryption.
Create an encrypted read replica of the DB instance. Promote the read replica to a standalone instance.

Answer(s): A

Reference:

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.Encryption.html

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QUESTION: 115

A database specialist was alerted that a production Amazon RDS MariaDB instance with 100 GB of storage was out of space. In response, the database specialist modified the DB instance and added 50 GB of storage capacity. Three hours later, a new alert is generated due to a lack of free space on the same DB instance. The database specialist decides to modify the instance immediately to increase its storage capacity by 20 GB.

What will happen when the modification is submitted?

The request will fail because this storage capacity is too large.
The request will succeed only if the primary instance is in active status.
The request will succeed only if CPU utilization is less than 10%.
The request will fail as the most recent modification was too soon.

Answer(s): D

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QUESTION: 116

A company uses Amazon Aurora for secure financial transactions. The data must always be encrypted at rest and in transit to meet compliance requirements.

Which combination of actions should a database specialist take to meet these requirements? (Choose two.)

Create an Aurora Replica with encryption enabled using AWS Key Management Service (AWS KMS). Then promote the replica to master.
Use SSL/TLS to secure the in-transit connection between the financial application and the Aurora DB cluster.
Modify the existing Aurora DB cluster and enable encryption using an AWS Key Management Service (AWS KMS) encryption key. Apply the changes immediately.
Take a snapshot of the Aurora DB cluster and encrypt the snapshot using an AWS Key Management Service (AWS KMS) encryption key. Restore the snapshot to a new DB cluster and update the financial application database endpoints.
Use AWS Key Management Service (AWS KMS) to secure the in-transit connection between the financial application and the Aurora DB cluster.

Answer(s): B,D

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