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AWS-SysOps Exam Questions - Online Test


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Q1. - (Topic 2) 

A user has created a queue named “myqueue” in US-East region with AWS SQS. The user’s AWS account ID is 123456789012. If the user wants to perform some action on this queue, which of the below Queue URL should he use? 

A. http://sqs.us-east-1.amazonaws.com/123456789012/myqueue 

B. http://sqs.amazonaws.com/123456789012/myqueue 

C. http://sqs. 123456789012.us-east-1.amazonaws.com/myqueue 

D. http:// 123456789012.sqs. us-east-1.amazonaws.com/myqueue 

Answer:

Explanation: 

When creating a new queue in SQS, the user must provide a queue name that is unique within the scope of all queues of user’s account. If the user creates queues using both the latest WSDL and a previous version, he will have a single namespace for all his queues. Amazon SQS assigns each queue created by user an identifier called a queue URL, which includes the queue name and other components that Amazon SQS determines. Whenever the user wants to perform an action on a queue, he must provide its queue URL. The queue URL for the account id 123456789012 & queue name “myqueue” in US-East-1 region will be http:// sqs.us-east-1.amazonaws.com/123456789012/myqueue. 

Q2. - (Topic 2) 

A customer is using AWS for Dev and Test. The customer wants to setup the Dev environment with 

Cloudformation. Which of the below mentioned steps are not required while using Cloudformation? 

A. Create a stack 

B. Configure a service 

C. Create and upload the template 

D. Provide the parameters configured as part of the template 

Answer:

Explanation: 

AWS Cloudformation is an application management tool which provides application modelling, deployment, configuration, management and related activities. AWS CloudFormation introduces two concepts: the template and the stack. The template is a JSON-format, text-based file that describes all the AWS resources required to deploy and run an application. The stack is a collection of AWS resources which are created and managed as a single unit when AWS CloudFormation instantiates a template. While creating a stack, the user uploads the template and provides the data for the parameters if required. 

Q3. - (Topic 2) 

A user has created an ELB with the availability zone US-East-1A. The user wants to add more zones to ELB to achieve High Availability. How can the user add more zones to the existing ELB? 

A. It is not possible to add more zones to the existing ELB 

B. The only option is to launch instances in different zones and add to ELB 

C. The user should stop the ELB and add zones and instances as required 

D. The user can add zones on the fly from the AWS console 

Answer:

Explanation: 

The user has created an Elastic Load Balancer with the availability zone and wants to add more zones to the existing ELB. The user can do so in two ways: 

From the console or CLI, add new zones to ELB; 

Launch instances in a separate AZ and add instances to the existing ELB. 

Q4. - (Topic 2) 

An organization has created 50 IAM users. The organization wants that each user can change their password but cannot change their access keys. How can the organization achieve this? 

A. The organization has to create a special password policy and attach it to each user 

B. The root account owner has to use CLI which forces each IAM user to change their password on first login 

C. By default each IAM user can modify their passwords 

D. The root account owner can set the policy from the IAM console under the password policy screen 

Answer:

Explanation: 

With AWS IAM, organizations can use the AWS Management Console to display, create, change or delete a password policy. As a part of managing the password policy, the user can enable all users to manage their own passwords. If the user has selected the option which allows the IAM users to modify their password, he does not need to set a separate policy for the users. This option in the AWS console allows changing only the password. 

Q5. - (Topic 2) 

A user has created a photo editing software and hosted it on EC2. The software accepts requests from the user about the photo format and resolution and sends a message to S3 to enhance the picture accordingly.Which of the below mentioned AWS services will help make a scalable software with the AWS infrastructure in this scenario? 

A. AWS Glacier 

B. AWS Elastic Transcoder 

C. AWS Simple Notification Service 

D. AWS Simple Queue Service 

Answer:

Explanation: 

Amazon Simple Queue Service (SQS. is a fast, reliable, scalable, and fully managed message queuing service. SQS provides a simple and cost-effective way to decouple the components of an application. The user can configure SQS, which will decouple the call between the EC2 application and S3. Thus, the application does not keep waiting for S3 to provide the data. 

Q6. - (Topic 3) 

You have a business-to-business web application running in a VPC consisting of an Elastic Load Balancer (ELB), web servers, application servers and a database. Your web application should only accept traffic from pre-defined customer IP addresses. 

Which two options meet this security requirement? Choose 2 answers A. Configure web server VPC security groups to allow traffic from your customers' IPs 

B. Configure your web servers to filter traffic based on the ELB's "X-forwarded-for" header 

C. Configure ELB security groups to allow traffic from your customers' IPs and deny all outbound traffic 

D. Configure a VPC NACL to allow web traffic from your customers' IPs and deny all outbound traffic 

Answer: A,B 

Q7. - (Topic 3) 

A user has two EC2 instances running in two separate regions. The user is running an internal memory 

management tool, which captures the data and sends it to CloudWatch in US East, using a CLI with the same namespace and metric. Which of the below mentioned options is true with respect to the above statement? 

A. The setup will not work as CloudWatch cannot receive data across regions 

B. CloudWatch will receive and aggregate the data based on the namespace and metric 

C. CloudWatch will give an error since the data will conflict due to two sources 

D. CloudWatch will take the data of the server, which sends the data first 

Answer:

Explanation: 

Amazon CloudWatch does not differentiate the source of a metric when receiving custom data. If the user is publishing a metric with the same namespace and dimensions from different sources, CloudWatch will treat them as a single metric. If the data is coming with the same timezone within a minute, CloudWatch will aggregate the data. It treats these as a single metric, allowing the user to get the statistics, such as minimum, maximum, average, and the sum of all across all servers. 

Q8. - (Topic 2) 

An organization is planning to use AWS for 5 different departments. The finance department is responsible to pay for all the accounts. However, they want the cost separation for each account to map with the right cost centre. How can the finance department achieve this? 

A. Create 5 separate accounts and make them a part of one consolidate billing 

B. Create 5 separate accounts and use the IAM cross account access with the roles for better management 

C. Create 5 separate IAM users and set a different policy for their access 

D. Create 5 separate IAM groups and add users as per the department’s employees 

Answer:

Explanation: 

AWS consolidated billing enables the organization to consolidate payments for multiple Amazon Web Services (AWS. accounts within a single organization by making a single paying account. Consolidated billing enables the organization to see a combined view of the AWS charges incurred by each account as well as obtain a detailed cost report for each of the individual AWS accounts associated with the paying account. 

Q9. - (Topic 3) 

A user runs the command “dd if=/dev/xvdf of=/dev/null bs=1M” on an EBS volume created from a snapshot and attached to a Linux instance. Which of the below mentioned activities is the user performing with the step given above? 

A. Pre warming the EBS volume 

B. Initiating the device to mount on the EBS volume 

C. Formatting the volume 

D. Copying the data from a snapshot to the device 

Answer:

Explanation: 

When the user creates an EBS volume and is trying to access it for the first time it will encounter reduced IOPS due to wiping or initiating of the block storage. To avoid this as well as achieve the best performance it is required to pre warm the EBS volume. For a volume created from a snapshot and attached with a Linux OS, the “dd” command pre warms the existing data on EBS and any restored snapshots of volumes that have been previously fully pre warmed. This command maintains incremental snapshots; however, because this operation is read-only, it does not pre warm unused space that has never been written to on the original volume. In the command “dd if=/dev/xvdf of=/dev/null bs=1M” , the parameter “if=input file” should be set to the drive that the user wishes to warm. The “of=output file” parameter should be set to the Linux null virtual device, /dev/null. The “bs” parameter sets the block size of the read operation; for optimal performance, this should be set to 1 MB. 

Q10. - (Topic 1) 

You have a web-style application with a stateless but CPU and memory-intensive web tier running on a cc2 8xlarge EC2 instance inside of a VPC The instance when under load is having problems returning requests within the SLA as defined by your business The application maintains its state in a DynamoDB table, but the data tier is properly provisioned and responses are consistently fast. 

How can you best resolve the issue of the application responses not meeting your SLA? 

A. Add another cc2 8xlarge application instance, and put both behind an Elastic Load Balancer 

B. Move the cc2 8xlarge to the same Availability Zone as the DynamoDB table 

C. Cache the database responses in ElastiCache for more rapid access 

D. Move the database from DynamoDB to RDS MySQL in scale-out read-replica configuration 

Answer:

Explanation: Reference: 

http://aws.amazon.com/elasticmapreduce/faqs/