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Q191. You have just finshed setting up an advertisement server in which one of the obvious choices for a service was Amazon Elastic Map Reduce( EMR) and are now troubleshooting some weird cluster states that you are seeing. Which of the below is not an Amazon EMR cluster state?

A. STARTING

B. STOPPED

C. RUNNING

D. WAITING

Answer: B 

Explanation:

Amazon Elastic Map Reduce (EMR) is a web service that enables businesses, researchers, data analysts, and developers to easily and cost-effectively process vast amounts of data.

Amazon EMR historically referred to an Amazon EMR cluster (and all processing steps assigned to it) as a "c|uster". Every cluster has a unique identifier that starts with "j-".

The different cluster states of an Amazon EMR cluster are listed below. STARTING — The cluster provisions, starts, and configures EC2 instances. BOOTSTRAPPING — Bootstrap actions are being executed on the cluster. RUNNING — A step for the cluster is currently being run.

WAITING — The cluster is currently active, but has no steps to run. TERMINATING - The cluster is in the process of shutting down. TERMINATED - The cluster was shut down without error. TERMINATED_W|TH_ERRORS - The cluster was shut down with errors. 

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


Q192. Your company has HQ in Tokyo and branch offices all over the world and is using a logistics software with a multi-regional deployment on AWS in Japan, Europe and USA, The logistic software has a 3- tier architecture and currently uses MySQL 5.6 for data persistence. Each region has deployed its own   database

In the HQ region you run an hourly batch process reading data from every region to compute cross regional reports that are sent by email to all offices this batch process must be completed as fast as possible to quickly optimize logistics how do you build the database architecture in order to meet the requirements'?

A. For each regional deployment, use RDS MySQL with a master in the region and a read replica in the HQ region

B. For each regional deployment, use MySQL on EC2 with a master in the region and send hourly EBS snapshots to the HQ region

C. For each regional deployment, use RDS MySQL with a master in the region and send hourly RDS snapshots to the HQ region

D. For each regional deployment, use MySQL on EC2 with a master in the region and use 53 to copy data files hourly to the HQ region

E. Use Direct Connect to connect all regional MySQL deployments to the HQ region and reduce network latency for the batch process

Answer: A


Q193. A friend tells you he is being charged $100 a month to host his WordPress website, and you tell him you can move it to AWS for him and he will only pay a fraction of that, which makes him very happy. He then tells you he is being charged $50 a month for the domain, which is registered with the same people that

set it up, and he asks if it's possible to move that to AWS as well. You tell him you aren't sure, but will look into it. Which of the following statements is true in regards to transferring domain names to AWS?

A. You can't transfer existing domains to AWS.

B. You can transfer existing domains into Amazon Route 53’s management.

C. You can transfer existing domains via AWS Direct Connect.

D. You can transfer existing domains via AWS Import/Export. 

Answer: B

Explanation:

With Amazon Route 53, you can create and manage your public DNS records with the AWS Management Console or with an easy-to-use API. If you need a domain name, you can find an available name and register it using Amazon Route 53. You can also transfer existing domains into Amazon Route 53’s management.

Reference: http://aws.amazon.com/route53/


Q194. You have been given a scope to deploy some AWS infrastructure for a large organisation. The requirements are that you will have a lot of EC2 instances but may need to add more when the average utilization of your Amazon EC2 fileet is high and conversely remove them when CPU utilization is low. Which AWS services would be best to use to accomplish this?

A. Auto Scaling, Amazon CIoudWatch and AWS Elastic Beanstalk

B. Auto Scaling, Amazon CIoudWatch and Elastic Load Balancing.

C. Amazon CIoudFront, Amazon CIoudWatch and Elastic Load Balancing.

D. AWS Elastic Beanstalk , Amazon CIoudWatch and Elastic Load Balancing. 

Answer: B

Explanation:

Auto Scaling enables you to follow the demand curve for your applications closely, reducing the need to manually provision Amazon EC2 capacity in advance. For example, you can set a condition to add new

Amazon EC2 instances in increments to the Auto Scaling group when the average utilization of your Amazon EC2 fileet is high; and similarly, you can set a condition to remove instances in the same increments when CPU utilization is low. If you have predictable load changes, you can set a schedule through Auto Scaling to plan your scaling actMties. You can use Amazon CIoudWatch to send alarms to trigger scaling actMties and Elastic Load Balancing to help distribute traffic to your instances within Auto Scaling groups. Auto Scaling enables you to run your Amazon EC2 fileet at optimal utilization.  Reference: http://aws.amazon.com/autoscaIing/


Q195. A user has deployed an application on his private cloud. The user is using his own monitoring tool. He wants to configure it so that whenever there is an error, the monitoring tool will notify him via SMS. Which of the below mentioned AWS services will help in this scenario?

A. AWS SES

B. AWS SNS

C. None because the user infrastructure is in the private cloud.

D. AWS SMS

Answer: B 

Explanation:

Amazon Simple Notification Service (Amazon SNS) is a fast, filexible, and fully managed push messaging service. Amazon SNS can be used to make push notifications to mobile devices. Amazon SNS can

deliver notifications by SMS text message or email to the Amazon Simple Queue Service (SQS) queues or to any HTTP endpoint. In this case user can use the SNS apis to send SMS.

Reference: http://aws.amazon.com/sns/


Q196. A user has configured a website and launched it using the Apache web server on port 80. The user is using ELB with the EC2 instances for Load Balancing. What should the user do to ensure that the EC2 instances accept requests only from ELB?

A. Configure the security group of EC2, which allows access to the ELB source security group

B. Configure the EC2 instance so that it only listens on the ELB port

C. Open the port for an ELB static IP in the EC2 security group

D. Configure the security group of EC2, which allows access only to the ELB listener 

Answer: A

Explanation:

When a user is configuring ELB and registering the EC2 instances with it, ELB will create a source security group. If the user wants to allow traffic only from ELB, he should remove all the rules set for the other requests and open the port only for the ELB source security group.

Reference:

http://docs.aws.amazon.com/EIasticLoadBaIancing/latest/DeveIoperGuide/using-elb-security-groups.htmI


Q197. You require the ability to analyze a large amount of data, which is stored on Amazon 53 using Amazon Elastic Map Reduce. You are using the cc2 8x large Instance type, whose CPUs are mostly idle during processing. Which of the below would be the most cost efficient way to reduce the runtime of the job?

A. Create more smaller flies on Amazon 53.

B. Add additional cc2 8x large instances by introducing a task group.

C. Use smaller instances that have higher aggregate 1/0 performance.

D. Create fewer, larger fi les on Amazon 53. 

Answer: C


Q198. While signing in REST/ Query requests, for additional security, you should transmit your requests using Secure Sockets Layer (SSL) by using   

A. HTIP

B. Internet Protocol Security(IPsec)

C. TLS (Transport Layer Security)

D. HTIPS

Answer: D


Q199. A user is launching an EC2 instance in the US East region. Which of the below mentioned options is recommended by AWS with respect to the selection of the availability zone?

A. Always select the AZ while launching an instance

B. Always select the US-East-1-a zone for HA

C. Do not select the AZ; instead let AWS select the AZ

D. The user can never select the availability zone while launching an instance 

Answer: C

Explanation:

When launching an instance with EC2, AWS recommends not to select the availability zone (AZ). AWS specifies that the default Availability Zone should be accepted. This is because it enables AWS to select the best Availability Zone based on the system health and available capacity. If the user launches additional instances, only then an Availability Zone should be specified. This is to specify the same or different AZ from the running instances.

Reference:  http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html


Q200. An organization has created an application which is hosted on the AWS EC2 instance. The application stores images to S3 when the end user uploads to it. The organization does not want to store the AWS secure credentials required to access the S3 inside the instance. Which of the below mentioned options is a possible solution to avoid any security threat?

A. Use the IAM based single sign between the AWS resources and the organization application.

B. Use the IAM role and assign it to the instance.

C. Since the application is hosted on EC2, it does not need credentials to access S3.

D. Use the X.509 certificates instead of the access and the secret access keys. 

Answer: B

Explanation:

The AWS IAM role uses temporary security credentials to access AWS services. Once the role is assigned to an instance, it will not need any security credentials to be stored on the instance. Reference:  http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html