DVA-C01 Amazon-Web-Services Exam Questions and Free Practice Test

Question 19

When you create a table with a hash-and-range key, you must define one or more secondary indexes on that table.

A. False, hash-range key is another name for secondary index

B. False, it is optional

C. True

D. False, when you have Hash-Range key you cannot define Secondary index

Correct Answer:B
When you create a table with a hash-and-range key in DynamoDB, you can also define one or more secondary indexes on that table.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LSI.htmI

Question 20

A user is launching an instance with EC2. Which of the below mentioned options does the user need to consider before launching an instance?

A. Select the region where the instance is being launched.

B. Select the instance type.

C. All the options listed should be considered..

D. Select the OS of the AM

Correct Answer:C
Regarding Amazon EC2, when launching an instance, the user needs to select the region the instance would be launched from. While launching, the user needs to plan for the instance type and the OS of the instance.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-Iaunch-instance_|inux.htmI

Question 21

A user has launched an EBS backed Linux instance. How can a user detach the root device and attach it to another instance as a secondary volume?

A. Unmount the root volume first and then detach it

B. It is not possible to mount the root volume to some other instance

C. Stop the first instance and then attach instance’s root volume as a new volume to the other instance

D. It is not possible to mount the root device as a secondary volume on the other instance

Correct Answer:C
If an Amazon EBS volume is the root device of an instance, it cannot be detached unless the instance is in the stopped state.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-detaching-volume.html

Question 22

A user wants to access RDS from an EC2 instance using IP addresses. Both RDS and EC2 are in the same region, but different AZs. Which of the below mentioned options help configure that the instance is accessed faster?

A. Configure the Private IP of the Instance in RDS security group

B. Security group of EC2 allowed in the RDS security group

C. Configuring the elastic IP of the instance in RDS security group

D. Configure the Public IP of the instance in RDS security group

Correct Answer:A
If the user is going to specify an IP range in RDS security group, AWS recommends using the private IP address of the Amazon EC2 instance. This provides a more direct network route from the Amazon EC2 instance to the Amazon RDS DB instance, and does not incur network charges for the data sent outside of the Amazon network.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithSecurityGroups.html

Question 23

A user is launching an AWS RDS with MySQL. Which of the below mentioned options allows the user to configure the INNODB engine parameters?

A. Options group

B. Engine parameters

C. Parameter groups

D. DB parameters

Correct Answer:C
With regard to RDS, the user can manage the configuration of a DB engine by using a DB parameter group. A DB parameter group contains engine configuration values that can be applied to one or more DB instances of the same instance type.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.html

Question 24

A user is trying to share a video file with all his friends. Which of the below mentioned AWS services will be cheapest and easy to use?

A. AWS S3

B. AWS EC2

C. AWS RRS

D. AWS Glacier

Correct Answer:C
AWS RRS provides the same functionality as AWS S3, but at a cheaper rate. It is ideally suited for non mission critical applications. It provides less durability than S3, but is a cheaper option.
Reference: http://docs.aws.amazon.com/AmazonS3/Iatest/dev/UsingRRS.htmI

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