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

Question 31

Which of the following are valid SNS delivery transports? Choose 2 answers

A. HTTP

B. UDP

C. SNIS

D. DynamoDB

E. Named Pipes

Correct Answer:AC

Question 32

You have been doing a lot of testing of your VPC Network by deliberately failing EC2 instances to test whether instances are failing over properly. Your customer who will be paying the AWS bill for all this asks you if he being charged for all these instances. You try to explain to him how the billing works on EC2 instances to the best of your knowledge. What would be an appropriate response to give to the customer
in regards to this?

A. Billing commences when Amazon EC2 AMI instance is completely up and billing ends as soon as the instance starts to shutdown.

B. Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance and billing ends when the instance shuts down.

C. Billing only commences only after 1 hour of uptime and billing ends when the instance terminates.

D. Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance and billing ends as soon as the instance starts to shutdown.

Correct Answer:B
Billing commences when Amazon EC2 initiates the boot sequence of an AMI instance. Billing ends when the instance shuts down, which could occur through a web services command, by running "shutdown -h", or through instance failure.
Reference: http://aws.amazon.com/ec2/faqs/#BiIIing

Question 33

A user is planning to host MS SQL on an EBS volume. It was recommended to use the AWS RDS. What advantages will the user have if he uses RDS in comparison to an EBS based DB?

A. Better throughput with PIOPS

B. Automated backup

C. NIS SQL is not supported with RDS

D. High availability with multi AZs

Correct Answer:B
Comparing with on-premises or EC2 based NIS SQL, RDS provides an automated backup feature. PIOPS is available with both RDS and EBS. However, HA is not available with NIS SQL.
Reference: https://aws.amazon.com/rds/faqs/

Question 34

A user is planning to use EBS for his DB requirement. The user already has an EC2 instance running in the VPC private subnet. How can the user attach the EBS volume to a running instance?

A. The user must create EBS within the same VPC and then attach it to a running instance.

B. The user can create EBS in the same zone as the subnet of instance and attach that EBS to instance.

C. It is not possible to attach an EBS to an instance running in VPC until the instance is stopped.

D. The user can specify the same subnet while creating EBS and then attach it to a running instanc

Correct Answer:B
A Virtual Private Cloud (VPC) is a virtual network dedicated to the user’s AWS account. The user can create subnets as per the requirement within a VPC. The VPC is always specific to a region. The user can create a VPC which can span multiple Availability Zones by adding one or more subnets in each Availability Zone.
The instance launched will always be in the same availability zone of the respective subnet. When creating an EBS the user cannot specify the subnet or VPC. However, the user must create the EBS in the same zone as the instance so that it can attach the EBS volume to the running instance.
Reference: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Subnets.htm|#VPCSubnet

Question 35

In regard to DynamoDB, what is the Global secondary index?

A. An index with a hash and range key that can be different from those on the table.

B. An index that has the same range key as the table, but a different hash key

C. An index that has the same hash key and range key as the table

D. An index that has the same hash key as the table, but a different range key

Correct Answer:A
Global secondary index - an index with a hash and range key that can be different from those on the table.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DataModel.html

Question 36

Is there a limit to how much throughput you can get out of a single table in DynamoDB?

A. Yes, not more than 1,000 writes/second or 1,000 reads/second

B. No

C. Yes, not more than 10,000 writes/second or 10,000 reads/second

D. No, but If you wish to exceed throughput rates of 10,000 writes/second or 10,000 reads/second, you must first contact AWS.

Correct Answer:D
In DynamoDB, you can increase the throughput you have provisioned for your table using UpdateTabIe API or in the AWS Management Console. If you wish to exceed throughput rates of 10,000 writes/second or 10,000 reads/second, you must first contact AWS.
Reference: http://aws.amazon.com/dynamodb/

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