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NEW QUESTION 30
A Database Specialist is setting up a new Amazon Aurora DB cluster with one primary instance and three Aurora Replicas for a highly intensive, business-critical application. The Aurora DB cluster has one medium- sized primary instance, one large-sized replica, and two medium sized replicas. The Database Specialist did not assign a promotion tier to the replicas.
In the event of a primary failure, what will occur?

  • A. Aurora will promote the largest-sized Aurora Replica
  • B. Aurora will promote an arbitrary Aurora Replica
  • C. Aurora will promote an Aurora Replica that is of the same size as the primary instance
  • D. Aurora will not promote an Aurora Replica

Answer: A

Explanation:
Priority: If you don't select a value, the default is tier-1. This priority determines the order in which Aurora
https://docs.amazonaws.cn/en_us/AmazonRDS/latest/AuroraUserGuide/aurora-replicas-adding.html More than one Aurora Replica can share the same priority, resulting in promotion tiers. If two or more Aurora Replicas share the same priority, then Amazon RDS promotes the replica that is largest in size. If two or more Aurora Replicas share the same priority and size, then Amazon RDS promotes an arbitrary replica in the same promotion tier.
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Managing.Backups.html#Aurora.Managing.FaultTolerance If two or more Aurora Replicas share the same priority, then Amazon RDS promotes the replica that is largest in size. If two or more Aurora Replicas share the same priority and size, then Amazon RDS promotes an arbitrary replica in the same promotion tier. https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Concepts.AuroraHighAvailability.html

 

NEW QUESTION 31
A company wants to build a new invoicing service for its cloud-native application on AWS. The company has a small development team and wants to focus on service feature development and minimize operations and maintenance as much as possible. The company expects the service to handle billions of requests and millions of new records every day. The service feature requirements, including data access patterns are well-defined. The service has an availability target of
99.99% with a milliseconds latency requirement. The database for the service will be the system of record for invoicing data.
Which database solution meets these requirements at the LOWEST cost?

  • A. Amazon RDS for PostgreSQL
  • B. Amazon Neptune
  • C. Amazon Aurora PostgreSQL Serverless
  • D. Amazon DynamoDB

Answer: D

Explanation:
Known patterns, minimum maintenance, miliseconds latency

 

NEW QUESTION 32
A social media company is using Amazon DynamoDB to store user profile data and user activity dat a. Developers are reading and writing the data, causing the size of the tables to grow significantly. Developers have started to face performance bottlenecks with the tables.
Which solution should a database specialist recommend to read items the FASTEST without consuming all the provisioned throughput for the tables?

  • A. Use the Scan API operation in parallel with many workers to read all the items. Use the Query API operation to read multiple items that have a specific partition key and sort key. Use the GetItem API operation to read a single item.
  • B. Use the Scan API operation with a filter expression that allows multiple items to be read. Use the Query API operation to read multiple items that have a specific partition key and sort key. Use the GetItem API operation to read a single item.
  • C. Use the Scan API operation in parallel with many workers to read all the items. Use the Query API operation to read a single item that has a specific primary key Use the BatchGetItem API operation to read multiple items.
  • D. Use the Scan API operation with a filter expression that allows multiple items to be read. Use the Query API operation to read a single item that has a specific primary key. Use the BatchGetItem API operation to read multiple items.

Answer: B

Explanation:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/SQLtoNoSQL.ReadData.html

 

NEW QUESTION 33
A database professional maintains a fleet of Amazon RDS database instances that are configured to utilize the default database parameter group. A database expert must connect a custom parameter group with certain database instances.
When will the instances be allocated to this new parameter group once the database specialist performs this change?

  • A. Within 24 hours after the change is made to the parameter group
  • B. In the next scheduled maintenance window of the DB instances
  • C. After the DB instances are manually rebooted
  • D. Instantaneously after the change is made to the parameter group

Answer: C

Explanation:
Explanation
When you associate a new DB parameter group with a DB instance, the modified static and dynamic parameters are applied only after the DB instance is rebooted.

 

NEW QUESTION 34
Recently, a gaming firm purchased a popular iOS game that is especially popular during the Christmas season.
The business has opted to include a leaderboard into the game, which will be powered by Amazon DynamoDB. The application's load is likely to increase significantly throughout the Christmas season.
Which solution satisfies these criteria at the lowest possible cost?

  • A. DynamoDB with on-demand capacity mode
  • B. DynamoDB with provisioned capacity mode with Auto Scaling
  • C. DynamoDB Streams
  • D. DynamoDB with DynamoDB Accelerator

Answer: B

Explanation:
Explanation
"On-demand is ideal for bursty, new, or unpredictable workloads whose traffic can spike in seconds or minutes" vs.
'DynamoDB released auto scaling to make it easier for you to manage capacity efficiently, and auto scaling continues to help DynamoDB users lower the cost of workloads that have a predictable traffic pattern."
https://aws.amazon.com/blogs/database/amazon-dynamodb-auto-scaling-performance-and-cost-optimization-at-a

 

NEW QUESTION 35
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