Amazon (DVA-C01) Exam Questions And Answers page 46

An Amazon RDS database instance is used by many applications to look up historical data. The query rate is relatively constant. When the historical data is updated each day, the resulting write traffic slows the read query performance and affects all application users.

What can be done to eliminate the performance impact on application users?

An application contains two components: one component to handle HTTP requests, and another component to handle background processing tasks. Each component must scale independently. The developer wants to deploy this application using AWS Elastic Beanstalk.

How should this application be deployed, based on these requirements?

An application deployed on AWS Elastic Beanstalk experiences increased error rates during deployments of new application versions, resulting in service degradation for users. The Development team believes that this is because of the reduction in capacity during the deployment steps. The team would like to change the deployment policy configuration of the environment to an option that maintains full capacity during deployment while using the existing instances.

Which deployment policy will meet these requirements while using the existing instances?

An application development team decides to use AWS X-Ray to monitor application code to analyze performance and perform root cause analysis.

What does the team need to do to begin using X-Ray? (Choose two.)

An application displays a status dashboard. The status is updated by 1 KB messages from an SQS queue. Although the status changes infrequently, the Developer must minimize the time between the message arrival in the queue and the dashboard update.

What technique provides the shortest delay in updating the dashboard?

An application has hundreds of users. Each user may use multiple devices to access the application. The Developer wants to assign unique identifiers to these users regardless of the device they use.

Which of the following methods should be used to obtain unique identifiers?

An application has hundreds of users. Each user may use multiple devices to access the application. The Developer wants to assign unique identifiers to these users regardless of the device they use.
Which of the following methods should be used to obtain unique identifiers?

An application has the following requirements:
• Performance efficiency of seconds with up to a minute of latency.
• The data storage size may grow up to thousands of terabytes.
• Per-message sizes may vary between 100 KB and 100 MB.
• Data can be stored as key/value stores supporting eventual consistency.

What is the MOST cost-effective AWS service to meet these requirements?

An application has the following requirements:
• Performance efficiency of seconds with up to a minute of latency.
• The data storage size may grow up to thousands of terabytes.
• Per-message sizes may vary between 100 KB and 100 MB.
• Data can be stored as key/value stores supporting eventual consistency.

What is the MOST cost-effective AWS service to meet these requirements?

An application ingests a large number of small messages and stores them in a database. The application uses AWS Lambda. A Development team is making changes to the application s processing logic. In testing, it is taking more than 15 minutes to process each message. The team is concerned the current backend may time out.

Which changes should be made to the backend system to ensure each message is processed in the MOST scalable way?