AWS-Certified-Developer-Associate Free Practice Test

The user has created multiple AutoScaIing groups. The user is trying to create a new AS group but it fails. How can the user know that he has reached the AS group limit specified by AutoScaIing in that region?

1. A. Run the command: as-describe-account-limits
2. B. Run the command: as-describe-group-limits
3. C. Run the command: as-max-account-limits
4. D. Run the command: as-list-account-limits

Correct Answer: A
A user can see the number of AutoScaIing resources currently allowed for the AWS account either by using the as-describe-account-Iimits command or by calling the DescribeAccountLimits action. Reference:http://docs.aws.amazon.com/AutoScaIing/latest/DeveIoperGuide/ts-as-capacity.html

An ELB is diverting traffic across 5 instances. One of the instances was unhealthy only for 20 minutes. What will happen after 20 minutes when the instance becomes healthy?

1. A. ELB will never divert traffic back to the same instance
2. B. ELB will not automatically send traffic to the same instanc
3. C. However, the user can configure to start sending traffic to the same instance
4. D. ELB starts sending traffic to the instance once it is healthy
5. E. ELB terminates the instance once it is unhealth
6. F. Thus, the instance cannot be healthy after 10 minutes

Correct Answer: C
AWS Elastic Load Balancing continuously checks the health of an instance. If one of the instances is unhealthy it stops sending traffic to it and automatically reroutes the traffic to the remaining running EC2 instances. If the failed EC2 instance is restored, Elastic Load Balancing will again start sending traffic to that instance.
Reference: http://docs.aws.amazon.com/E|asticLoadBaIancing/latest/DeveIoperGuide/Svclntro.htm|

A startup s photo-sharing site is deployed in a VPC. An ELB distributes web traffic across two subnets. ELB session stickiness is configured to use the AWS-generated session cookie, with a session TTL of 5 minutes. The webserver Auto Scaling Group is configured as: min-size=4, max-size=4.
The startups preparing for a public launch, by running load-testing software installed on a single EC2 instance running in us-west-2a. After 60 minutes of load-testing, the webserver logs show:

Which recommendations can help ensure load-testing HTTP requests are evenly distributed across the
four webservers? Choose 2 answers

1. A. Launch and run the load-tester EC2 instance from us-east-1 instead.
2. B. Re-configure the load-testing software to re-resolve DNS for each web request.
3. C. Use a 3rd-party load-testing service which offers globally-distributed test clients.
4. D. Configure ELB and Auto Scaling to distribute across us-west-2a and us-west-2c.
5. E. Configure ELB session stickiness to use the app-specific session cooki

Correct Answer: BE

A user is planning to host a web server as well as an app server on a single EC2 instance which is a part of the public subnet of a VPC. How can the user setup to have two separate public IPs and separate security groups for both the application as well as the web server?

1. A. Launch a VPC instance with two network interface
2. B. Assign a separate security group to each and AWS will assign a separate public IP to them.
3. C. Launch VPC with two separate subnets and make the instance a part of both the subnets.
4. D. Launch a VPC instance with two network interface
5. E. Assign a separate security group and elastic IP to them.
6. F. Launch a VPC with ELB such that it redirects requests to separate VPC instances of the public subne

Correct Answer: C
If you need to host multiple websites(with different IPs) on a single EC2 instance, the following is the suggested method from AWS.
Launch a VPC instance with two network interfaces
Assign elastic IPs from VPC EIP pool to those interfaces (Because, when the user has attached more than one network interface with an instance, AWS cannot assign public IPs to them.)
Assign separate Security Groups if separate Security Groups are needed
This scenario also helps for operating network appliances, such as firewalls or load balancers that have multiple private IP addresses for each network interface.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MuItipIeIP.html

In regard to AWS CIoudFormation, what is a stack?

1. A. The set of AWS templates that are created and managed as a template
2. B. The set of AWS resources that are created and managed as a template
3. C. The set of AWS resources that are created and managed as a single unit
4. D. The set of AWS templates that are created and managed as a single unit

Correct Answer: C
A stack is the set of AWS resources that are created and managed as a single unit when AWS C|oudFormation initiates a template.
Reference: http://docs.aws.amazon.com/AWSCIoudFormation/latest/UserGuide/concept-stack.html