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April 20, 2017

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Q11. An orgAMzation is hosting an application as part of the free usage tier. The orgAMzation wants to create IAM users for each of its 150 employees and they may access AWS as part of free usage tier. What will you advise the orgAMzation?

A. The IAM is not available as a part of the free usage tier

B. Create IAM roles and give access based on role since it will not cost the user

C. Do not create more than 100 users as it will cost the orgAMzation.

D. Create IAM users for each employee as it does not cost 

Answer: D

Explanation:

IAM is a free service. You can create as many IAM users or groups as desired free of cost. Reference:       http://docs.aws.amazon.com/IAM/latest/UserGuide/IAM_Introduction.htm|


Q12. AutoScaIing is configured with 3 AZs. Each zone has 5 instances running. If AutoScaIing wants to terminate an instance based on the policy action, which instance will it terminate first?

A. Terminate the first launched instance

B. Randomly select the instance for termination

C. Terminate the instance from the AZ which does not have a high AWS load

D. Terminate the instance from the AZ which has instances running near to the billing hour 

Answer: B

Explanation:

Before Auto Scaling selects an instance to terminate, it first identifies the Availability Zone that has more instances than the other Availability Zones used by the group. If all the Availability Zones have the same number of instances, it identifies a random Availability Zone.

Reference:        http://docs.aws.amazon.com/AutoScaIing/latest/DeveIoperGuide/us-termination-policy.html


Q13. A user has launched an RDS instance. The user has created 3 databases on the same server. What can the maximum size be for each database?

A. The size of each DB cannot be more than 3 TB

B. It is not possible to have more than one DB on a single instance

C. The total instance storage size cannot be more than 3 TB

D. The size of each DB cannot be more than 1 TB 

Answer: C

Explanation:

The AWS RDS DB instance is an isolated DB environment provided by AWS in which the user can create more than 1 database. The maximum size ofthe instance should be between 5 GB and 3 TB. The size of each DB can be anything in this range.

Reference:       http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.html


Q14. An orgAMzation has 500 employees. The orgAMzation wants to set up AWS access for each department. Which of the below mentioned options is a possible solution?

A. Create IAM roles based on the permission and assign users to each role

B. Create IAM users and provide indMdual permission to each

C. Create IAM groups based on the permission and assign IAM users to the groups

D. It is not possible to manage more than 100 IAM users with AWS 

Answer: C

Explanation:

An IAM group is a collection of IAM users. Groups let the user specify permissions for a collection of users, which can make it easier to manage the permissions for those users.

Reference: http://docs.aws.amazon.com/IAM/|atest/UserGuide/Using_WorkingWithGroupsAndUsers.htmI


Q15. In relation to Amazon SQS, how can you ensure that messages are delivered in order?

A. Increase the size of your queue

B. Send them with a timestamp

C. Give each message a unique id.

D. AWS cannot guarantee that you will receive messages in the exact order you sent them 

Answer: D

Explanation:

Amazon SQS makes a best effort to preserve order in messages, but due to the distributed nature of the queue, AWS cannot guarantee that you will receive messages in the exact order you sent them. You typically place sequencing information or timestamps in your messages so that you can reorder them upon receipt.

Reference: https://aws.amazon.com/items/1343?externaI|D=1343


Q16. A user has configured ELB with two instances running in separate AZs of the same region? Which of the below mentioned statements is true?

A. Nlulti AZ instances will provide HA with ELB

B. lVIuIti AZ instances are not possible with a single ELB

C. Nlulti AZ instances will provide scalability with ELB

D. The user can achieve both HA and scalability with ELB 

Answer: A

Explanation:

If a user is running two instances in separate AZs, it will provide HA with ELB since ELB will automatically stop routing the traffic to unhealthy instances and send it to healthy instances only.


Q17. In regards to Amazon SQS how can you secure the messages in your queues?

A. You can't

B. Amazon SQS uses either your Access Key ID or an X.509 certificate to authenticate your identity

C. Through your IAM access keys

D. Don't use root access

Answer: B

Explanation:

Authentication mechAMsms are provided to ensure that messages stored in Amazon SQS queues are secured against unauthorized access. Only the AWS account owners can access the queues they create. Amazon SQS uses proven cryptographic methods to authenticate your identity, either through the use of your Access Key ID and request signature, or through the use of an X.509 certificate.

Reference: https://aws.amazon.com/sqs/faqs/


Q18. 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 

Answer: A

Explanation:

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


Q19. You cannot access your AWS console, so you revert to using the CLI that you are not familiar with. Which of the following commands is not a valid CLI command for EC2 instances?

A. ec2-allocate-address

B. ec2-attach-internet-gateway

C. ec2-associate-route-table

D. ec2-allocate-interface 

Answer: D

Explanation:

You can use the CLI tools to manage your Amazon EC2 resources (such as instances, security groups, and volumes) and your Amazon VPC resources (such as VPCs, subnets, route tables, and Internet gateways). Before you can start using the tools, you must download and configure them.

The following are valid CLI commands for EC2 instances: ec2-accept-vpc-peering-connection

ec2-allocate-address

ec2-assign-private-ip-addresses ec2-associate-address

ec2-associate-dhcp-options ec2-associate-route-table

ec2-attach-internet-gateway

ec2-attach-network-interface (not ec2-allocate-interface) Reference:

http://docs.aws.amazon.com/AWSEC2/latest/CommandLineReference/command-reference.html


Q20. You have a number of image files to encode. In an Amazon SQS worker queue, you create an Amazon SQS message for each file specifying the command (jpeg-encode) and the location of the file in Amazon S3. Which of the following statements best describes the functionality of Amazon SQS?

A. Amazon SQS is for single-threaded sending or receMng speeds.

B. Amazon SQS is a non-distributed queuing system.

C. Amazon SQS is a distributed queuing system that is optimized for horizontal scalability, not for single-threaded sending or receMng speeds.

D. Amazon SQS is a distributed queuing system that is optimized for vertical scalability and for single-threaded sending or receMng speeds.

Answer:

Explanation:

Amazon SQS is a distributed queuing system that is optimized for horizontal scalability, not for

single-threaded sending or receMng speeds. A single client can send or receive Amazon SQS messages at a rate of about 5 to 50 messages per second. Higher receive performance can be achieved by requesting multiple messages (up to 10) in a single call. It may take several seconds before a message that has been to a queue is available to be received.

Reference:      http://media.amazonwebservices.com/AWS_Storage_Options.pdf



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