AWS-Certified-Developer-Associate Amazon Exam Questions and Free Practice Test

Question 73

When using a large Scan operation in DynamoDB, what technique can be used to minimize the impact of a scan on a tabIe's provisioned throughput?

A. Set a smaller page size for the scan

B. Use parallel scans

C. Define a range index on the table

D. Prewarm the table by updating all items

Correct Answer:C

Question 74

Which EC2 API call would you use to retrieve a list of Amazon Machine Images (AMIs)?

A. Descnbelnstances

B. DescribeAMIs

C. Describelmages

D. GetAMIs

E. You cannot retrieve a list of AMIs as there are over 10,000 AMIs

Correct Answer:E

Question 75

An ELB is diverting traffic across 5 instances. One of the instances was unhealthy only for 20 minutes. What will happen after 20 minutes when the instance becomes healthy?

A. ELB will never divert traffic back to the same instance

B. ELB will not automatically send traffic to the same instanc

C. However, the user can configure to start sending traffic to the same instance

D. ELB starts sending traffic to the instance once it is healthy

E. ELB terminates the instance once it is unhealth

F. Thus, the instance cannot be healthy after 10 minutes

Correct Answer:C
AWS Elastic Load Balancing continuously checks the health of an instance. If one of the instances is unhealthy it stops sending traffic to it and automatically reroutes the traffic to the remaining running EC2 instances. If the failed EC2 instance is restored, Elastic Load Balancing will again start sending traffic to that instance.
Reference: http://docs.aws.amazon.com/E|asticLoadBaIancing/latest/DeveIoperGuide/Svclntro.htm|

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