AWS-Certified-Developer-Associate Free Practice Test

A user wants to configure AutoScaIing which scales up when the CPU utilization is above 70% and scales down when the CPU utilization is below 30%. How can the user configure AutoScaIing for the above mentioned condition?

1. A. Use AutoScaIing with a schedule
2. B. Configure ELB to notify AutoScaIing on load increase or decrease
3. C. Use dynamic AutoScaIing with a policy
4. D. Use AutoScaIing by manually modifying the desired capacity during a condition

Correct Answer: C
The user can configure the AutoScaIing group to automatically scale up and then scale down based on the specified conditions. To configure this, the user must setup policies which will get triggered by the C|oudWatch alarms.
Reference:
http://docs.aws.amazon.com/AutoScaling/latest/DeveIoperGuide/as-scaIe-based-on-demand.html

A user is configuring the HTTPS protocol on a front end ELB and the SSL protocol for the back-end listener in ELB. What will ELB do?

1. A. It will allow you to create the configuration, but the instance will not pass the health check
2. B. Receives requests on HTTPS and sends it to the back end instance on SSL
3. C. It will not allow you to create this configuration
4. D. It will allow you to create the configuration, but ELB will not work as expected

Correct Answer: C
If a user is configuring HTTPS on the front end and TCP on the back end, ELB will not allow saving these listeners and will respond with the message.
"Load Balancer protocol is an application layer protocol, but instance protocol is not. Both the Load Balancer protocol and the instance protocol should be at the same layer. Please fix."
Reference:
http://docs.aws.amazon.com/EIasticLoadBaIancing/latest/DeveIoperGuide/elb-troubleshooting.htmI

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?

1. A. Unmount the root volume first and then detach it
2. B. It is not possible to mount the root volume to some other instance
3. C. Stop the first instance and then attach instance’s root volume as a new volume to the other instance
4. 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

A user is planning to host a mobile game on EC2 which sends notifications to active users on either high score or the addition of new features. The user should get this notification when he is online on his mobile device. Which of the below mentioned AWS services can help achieve this functionality?

1. A. AWS Simple Notification Service.
2. B. AWS Simple Queue Service.
3. C. AWS Mobile Communication Service.
4. D. AWS Simple Email Servic

Correct Answer: A
Amazon Simple Notification Service (Amazon SNS) is a fast, filexible, and fully managed push messaging service. Amazon SNS makes it simple and cost-effective to push to mobile devices, such as iPhone, iPad, Android, Kindle Fire, and internet connected smart devices, as well as pushing to other distributed services.
Reference: http://aws.amazon.com/sns

When a user is launching an instance with EC2, which of the below mentioned options is not available during the instance launch console for a key pair?

1. A. Proceed without the key pair
2. B. Upload a new key pair
3. C. Select an existing key pair
4. D. Create a new key pair

Correct Answer: B
While launching an EC2 instance, the user can create a new key pair, select an existing key pair or proceed without a key pair. The user cannot upload a new key pair in the EC2 instance launch console. Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/launching-instance.html