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Free DBS-C01 Exam Braindumps (page: 26)

Page 26 of 82
PDF with 327 Questions

A database specialist deployed an Amazon RDS DB instance in Dev-VPC1 used by their development team. Dev-VPC1 has a peering connection with Dev-VPC2 that belongs to a different development team in the same department. The networking team confirmed that the routing between VPCs is correct; however, the database engineers in Dev-VPC2 are getting a timeout connections error when trying to connect to the database in Dev- VPC1.

What is likely causing the timeouts?

  1. The database is deployed in a VPC that is in a different Region.
  2. The database is deployed in a VPC that is in a different Availability Zone.
  3. The database is deployed with misconfigured security groups.
  4. The database is deployed with the wrong client connect timeout configuration.

Answer(s): C



A company has a production environment running on Amazon RDS for SQL Server with an in-house web application as the front end. During the last application maintenance window, new functionality was added to the web application to enhance the reporting capabilities for management. Since the update, the application is slow to respond to some reporting queries.

How should the company identify the source of the problem?

  1. Install and configure Amazon CloudWatch Application Insights for Microsoft .NET and Microsoft SQL Server. Use a CloudWatch dashboard to identify the root cause.
  2. Enable RDS Performance Insights and determine which query is creating the problem. Request changes to the query to address the problem.
  3. Use AWS X-Ray deployed with Amazon RDS to track query system traces.
  4. Create a support request and work with AWS Support to identify the source of the issue.

Answer(s): B



An electric utility company wants to store power plant sensor data in an Amazon DynamoDB table. The utility company has over 100 power plants and each power plant has over 200 sensors that send data every 2 seconds. The sensor data includes time with milliseconds precision, a value, and a fault attribute if the sensor is malfunctioning. Power plants are identified by a globally unique identifier. Sensors are identified by a unique identifier within each power plant. A database specialist needs to design the table to support an efficient method of finding all faulty sensors within a given power plant.

Which schema should the database specialist use when creating the DynamoDB table to achieve the fastest query time when looking for faulty sensors?

  1. Use the plant identifier as the partition key and the measurement time as the sort key. Create a global secondary index (GSI) with the plant identifier as the partition key and the fault attribute as the sort key.
  2. Create a composite of the plant identifier and sensor identifier as the partition key. Use the measurement time as the sort key. Create a local secondary index (LSI) on the fault attribute.
  3. Create a composite of the plant identifier and sensor identifier as the partition key. Use the measurement time as the sort key. Create a global secondary index (GSI) with the plant identifier as the partition key and the fault attribute as the sort key.
  4. Use the plant identifier as the partition key and the sensor identifier as the sort key. Create a local secondary index (LSI) on the fault attribute.

Answer(s): B



A company is releasing a new mobile game featuring a team play mode. As a group of mobile device users play together, an item containing their statuses is updated in an Amazon DynamoDB table. Periodically, the other users’ devices read the latest statuses of their teammates from the table using the BatchGetltemn operation.

Prior to launch, some testers submitted bug reports claiming that the status data they were seeing in the game was not up-to-date. The developers are unable to replicate this issue and have asked a database specialist for a recommendation.

Which recommendation would resolve this issue?

  1. Ensure the DynamoDB table is configured to be always consistent.
  2. Ensure the BatchGetltem operation is called with the ConsistentRead parameter set to false.
  3. Enable a stream on the DynamoDB table and subscribe each device to the stream to ensure all devices receive up-to-date status information.
  4. Ensure the BatchGetltem operation is called with the ConsistentRead parameter set to true.

Answer(s): D



Page 26 of 82



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