Free DVA-C01 Exam Dumps

Question 41

Does Amazon DynamoDB support both increment and decrement atomic operations?

A. No, neither increment nor decrement operations.
B. Only increment, since decrement are inherently impossible with DynamoDB's data model.
C. Only decrement, since increment are inherently impossible with DynamoDB's data model.
D. Yes, both increment and decrement operation

Correct Answer:D
Amazon DynamoDB supports increment and decrement atomic operations.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/APISummary.html

Question 42

A user has setup an application on EC2 which uses the IAM user access key and secret access key to make secure calls to S3. The user wants to temporarily stop the access to S3 for that IAM user. What should the root owner do?

A. Delete the IAM user
B. Change the access key and secret access key for the users
C. Disable the access keys for the IAM user
D. Stop the instance

Correct Answer:C
If the user wants to temporarily stop the access to S3 the best solution is to disable the keys. Deleting the user will result in a loss of all the credentials and the app will not be useful in the future. If the user stops the instance IAM users can still access S3. The change of the key does not help either as they are still active. The best possible solution is to disable the keys.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/NIanagingCredentia|s.html

Question 43

Company C is currently hosting their corporate site in an Amazon S3 bucket with Static Website Hosting enabled. Currently, when visitors go to http://www.companyc.com the index.htmI page is returned. Company C now would like a new page weIcome.htmI to be returned when a visitor enters http://www.companyc.com in the browser.
Which of the following steps will allow Company C to meet this requirement? Choose 2 answers

A. Upload an html page named we|come.htm| to their S3 bucket
B. Create a welcome subfolder in their S3 bucket
C. Set the Index Document property to weIcome.htmI
D. Move the index.htmI page to a welcome subfolder
E. Set the Error Document property to weIcome.htmI

Correct Answer:AC

Question 44

In DynamoDB, if you create a table and request 10 units of write capacity and 200 units of read capacity of provisioned throughput, how much would you be charged in US East (Northern Virginia) Region?

A. $0.05 per hour
B. $0.10 per hour
C. $0.03 per hour
D. $0.15 per hour

Correct Answer:A
To understand pricing in DynamoDB, consider the following example. If you create a table and request 10 units of write capacity and 200 units of read capacity of provisioned throughput, you would be charged:
$0.01 + (4 x $0.01) = $0.05 per hour
Reference: http://aws.amazon.com/dynamodb/pricing/

Question 45

A user is running a MySQL RDS instance. The user will not use the DB for the next 3 months. How can the user save costs?

A. Pause the RDS actMties from CLI until it is required in the future
B. Stop the RDS instance
C. Create a snapshot of RDS to launch in the future and terminate the instance now
D. Change the instance size to micro

Correct Answer:C
The RDS instances unlike the AWS EBS backed instances cannot be stopped or paused. The user needs to take the final snapshot, terminate the instance and launch a new instance in the future from that snapshot
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.BackingUpAndRestoringAmazonR DSInstances.htmI