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Q31. When does the billing of an Amazon EC2 system begin?

A. It starts when the Status column for your distribution changes from Creating to Deployed.

B. It starts as soon as you click the create instance option on the main EC2 console.

C. It starts when your instance reaches 720 instance hours.

D. It starts when Amazon EC2 initiates the boot sequence of an AM instance. 

Answer: D

Explanation:

Billing commences when Amazon EC2 initiates the boot sequence of an AM instance. Billing ends when the instance terminates, which could occur through a web services command, by running "shutdown -h", or through instance failure. When you stop an instance, Amazon shuts it down but doesn/Et charge hourly usage for a stopped instance, or data transfer fees, but charges for the storage for any Amazon EBS volumes.

Reference: http://aws.amazon.com/ec2/faqs/


Q32. What is the maximum key length of a tag'?

A. 512 Unicode characters

B. 64 Unicode characters

C. 256 Unicode characters

D. 128 Unicode characters 

Answer: D


Q33. You are in the process of moving your friend's WordPress site onto AWS to try and save him some money, and you have told him that he should probably also move his domain name. He asks why he can't leave

his domain name where it is and just have his infrastructure on AWS. What would be an incorrect response to his question ?

A. Route 53 offers low query latency for your end users.

B. Route 53 is designed to automatically answer queries from the optimal location depending on network conditions.

C. The globally distributed nature of AWS's DNS servers helps ensure a consistent ability to route your end users to your application.

D. Route 53 supports Domain Name System Security Extensions (DNSSEC). 

Answer: D

Explanation:

Amazon Route 53 provides highly available and scalable Domain Name System (DNS), domain name registration, and health-checking web services.

Route 53 is built using AWS’s highly available and reliable infrastructure. The globally distributed nature of our DNS servers helps ensure a consistent ability to route your end users to your application by circumventing any internet or network related issues. Route 53 is designed to provide the level of dependability required by important applications. Using a global anycast network of DNS servers around the world, Route 53 is designed to automatically answer queries from the optimal location depending on network conditions. As a result, the service offers low query latency for your end users.

Amazon Route 53 does not support Domain Name System Security Extensions (DNSSEC) at this time. Reference: https://aws.amazon.com/route53/faqs/


Q34. In Amazon EC2, if your EBS volume stays in the detaching state, you can force the detachment by clicking .

A. Force Detach

B. Detach Instance

C. AttachVoIume

D. Attachlnstance 

Answer: A

Explanation:

If your volume stays in the detaching state, you can force the detachment by clicking Force Detach. Reference:  http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/ebs-detaching-volume.html


Q35. In Amazon Elastic Compute Cloud, which ofthe following is used for communication between instances in the same network (EC2-Classic or a VPC)?

A. Private IP addresses

B. Elastic IP addresses

C. Static IP addresses

D. Public IP addresses 

Answer: A

Explanation:

A private IP address is an IP address that's not reachable over the Internet. You can use private IP addresses for communication between instances in the same network (EC2-Classic or a VPC). Reference:

http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/using-instance-addressing.htmI


Q36. You have been using T2 instances as your CPU requirements have not been that intensive. However you now start to think about larger instance types and start looking at M and IV|3 instances. You are a little confused as to the differences between them as they both seem to have the same ratio of CPU and memory. Which statement below is incorrect as to why you would use one over the other?

A. M3 instances are less expensive than M1 instances.

B. IV|3 instances are configured with more swap memory than M instances.

C. IV|3 instances provide better, more consistent performance that M instances for most use-cases.

D. M3 instances also offer SSD-based instance storage that delivers higher I/O performance. 

Answer: B

Explanation:

Amazon EC2 allows you to set up and configure everything about your instances from your operating system up to your applications. An Amazon Nlachine Image (AMI) is simply a packaged-up environment that includes all the necessary bits to set up and boot your instance.

M1 and M3 Standard instances have the same ratio of CPU and memory, some reasons below as to why you would use one over the other.

IV|3 instances provide better, more consistent performance that M instances for most use-cases. M3 instances also offer SSD-based instance storage that delivers higher I/O performance.

M3 instances are also less expensive than M1 instances. Due to these reasons, we recommend M3 for applications that require general purpose instances with a balance of compute, memory, and network resources.

However, if you need more disk storage than what is provided in M3 instances, you may still find M1 instances useful for running your applications.

Reference: https://aws.amazon.com/ec2/faqs/


Q37. Please select the most correct answer regarding the persistence of the Amazon Instance Store

A. The data on an instance store volume persists only during the life of the associated Amazon EC2 instance

B. The data on an instance store volume is lost when the security group rule of the associated instance is changed.

C. The data on an instance store volume persists even after associated Amazon EC2 instance is deleted 

Answer: B


Q38. Is it possible to access your EBS snapshots?

A. Yes, through the Amazon 53 APIs.

B. Yes, through the Amazon EC2 APIs.

C. No, EBS snapshots cannot be accessed; they can only be used to create a new EBS volume.

D. EBS doesn't provide snapshots. 

Answer: B


Q39. You would like to create a mirror image of your production environment in another region for disaster recovery purposes. Which of the following AWS resources do not need to be recreated in the second region? (Choose 2 answers)

A. Route 53 Record Sets

B. IM Roles

C. Elastic IP Addresses (EIP)

D. EC2 Key Pairs

E. Launch configurations

F. Security Groups 

Answer: A, C

Explanation:

Reference:

http://tech.com/wp-content/themes/optimize/download/AWSDisaster_Recovery.pdf (page 6)


Q40. What does the following command do with respect to the Amazon EC2 security groups? ec2-revoke RevokeSecurityGroup Ingress

A. Removes one or more security groups from a rule.

B. Removes one or more security groups from an Amazon EC2 instance.

C. Removes one or more rules from a security group.

D. Removes a security group from our account. 

Answer: C