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The Improve Guide To AWS-SysOps pdf

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Q11. – (Topic 3) 

What would happen to an RDS (Relational Database Service) multi-Availability Zone deployment if the primary DB instance fails? 

A. The IP of the primary DB Instance is switched to the standby DB Instance. 

B. A new DB instance is created in the standby availability zone. 

C. The canonical name record (CNAME) is changed from primary to standby. 

D. The RDS (Relational Database Service) DB instance reboots. 

Answer:

Explanation: Reference: 

http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_RebootInstance.html 

Q12. – (Topic 2) 

A user has setup a web application on EC2. The user is generating a log of the application performance at every second. There are multiple entries for each second. If the user wants to send that data to CloudWatch every minute, what should he do? 

A. The user should send only the data of the 60th second as CloudWatch will map the receive data timezone with the sent data timezone 

B. It is not possible to send the custom metric to CloudWatch every minute 

C. Give CloudWatch the Min, Max, Sum, and SampleCount of a number of every minute 

D. Calculate the average of one minute and send the data to CloudWatch 

Answer:

Explanation: 

Amazon CloudWatch aggregates statistics according to the period length that the user has specified while getting data from CloudWatch. The user can publish as many data points as he wants with the same or similartime stamps. CloudWatch aggregates them by the period length when the user calls get statistics about those data points. CloudWatch records the average (sum of all items divided by the number of items. of the values received for every 1-minute period, as well as the number of samples, maximum value, and minimum value for the same time period. CloudWatch will aggregate all the data which have time stamps within a one-minute period. 

Q13. – (Topic 1) 

You are tasked with the migration of a highly trafficked Node JS application to AWS In order to comply with organizational standards Chef recipes must be used to configure the application servers that host this application and to support application lifecycle events. 

Which deployment option meets these requirements while minimizing administrative burden? 

A. Create a new stack within Opsworks add the appropriate layers to the stack and deploy the application 

B. Create a new application within Elastic Beanstalk and deploy this application to a new environment 

C. Launch a Mode JS server from a community AMI and manually deploy the application to the launched EC2 instance 

D. Launch and configure Chef Server on an EC2 instance and leverage the AWS CLI to launch application servers and configure those instances using Chef. 

Answer:

Explanation: Reference: 

http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.deployment.html 

Q14. – (Topic 3) 

A user has launched an RDS postgreSQL DB with AWS. The user did not specify the maintenance window during creation. The user has configured RDS to update the DB instance type from micro to large. If the user wants to have it during the maintenance window, what will AWS do? 

A. AWS will not allow to update the DB until the maintenance window is configured 

B. AWS will select the default maintenance window if the user has not provided it 

C. AWS will ask the user to specify the maintenance window during the update 

D. It is not possible to change the DB size from micro to large with RDS 

Answer:

Explanation: 

AWS RDS has a compulsory maintenance window which by default is 30 minutes. If the user does not specify the maintenance window during the creation of RDS then AWS will select a 30-minute maintenance window randomly from an 8-hour block of time per region. In this case, Amazon RDS assigns a 30-minute maintenance window on a randomly selected day of the week. 

Q15. – (Topic 2) 

A user has stored data on an encrypted EBS volume. The user wants to share the data with his friend’s AWS account. How can user achieve this? 

A. Create an AMI from the volume and share the AMI 

B. Copy the data to an unencrypted volume and then share 

C. Take a snapshot and share the snapshot with a friend 

D. If both the accounts are using the same encryption key then the user can share the volume directly 

Answer:

Explanation: 

AWS EBS supports encryption of the volume. It also supports creating volumes from existing snapshots 

provided the snapshots are created from encrypted volumes. If the user is having data on an encrypted volume and is trying to share it with others, he has to copy the data from the encrypted volume to a new unencrypted volume. Only then can the user share it as an encrypted volume data. Otherwise the snapshot cannot be shared. 

Q16. – (Topic 3) 

An AWS account wants to be part of the consolidated billing of his organization’s payee account. How can the owner of that account achieve this? 

A. The payee account has to request AWS support to link the other accounts with his account 

B. The owner of the linked account should add the payee account to his master account list from the billing console 

C. The payee account will send a request to the linked account to be a part of consolidated billing 

D. The owner of the linked account requests the payee account to add his account to consolidated billing 

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. To add a particular account (linked. to the master (payee. account, the payee account has to request the linked account to join consolidated billing. Once the linked account accepts the request henceforth all charges incurred by the linked account will be paid by the payee account. 

Q17. – (Topic 2) 

A user wants to make so that whenever the CPU utilization of the AWS EC2 instance is above 90%, the redlight of his bedroom turns on. Which of the below mentioned AWS services is helpful for this purpose? 

A. AWS CloudWatch + AWS SES 

B. AWS CloudWatch + AWS SNS 

C. None. It is not possible to configure the light with the AWS infrastructure services 

D. AWS CloudWatch and a dedicated software turning on the light 

Answer:

Explanation: 

Amazon Simple Notification Service (Amazon SNS. is a fast, flexible, and fully managed push messaging service. Amazon SNS can deliver notifications by SMS text message or email to the Amazon Simple Queue Service (SQS. queues or to any HTTP endpoint. The user can configure some sensor devices at his home which receives data on the HTTP end point (REST calls. and turn on the red light. The user can configure the CloudWatch alarm to send a notification to the AWS SNS HTTP end point (the sensor device. and it will turn the light red when there is an alarm condition. 

Q18. – (Topic 3) 

A user has configured an SSL listener at ELB as well as on the back-end instances. Which of the below 

mentioned statements helps the user understand ELB traffic handling with respect to the SSL listener? 

A. It is not possible to have the SSL listener both at ELB and back-end instances 

B. ELB will modify headers to add requestor details 

C. ELB will intercept the request to add the cookie details if sticky session is enabled 

D. ELB will not modify the headers 

Answer:

Explanation: 

When the user has configured Transmission Control Protocol (TCP. or Secure Sockets Layer (SSL. for both front-end and back-end connections of the Elastic Load Balancer, the load balancer forwards the request to the back-end instances without modifying the request headers unless the proxy header is enabled. SSL does not support sticky sessions. If the user has enabled a proxy protocol it adds the source and destination IP to the header. 

Q19. – (Topic 1) 

Which two AWS services provide out-of-the-box user configurable automatic backup-as-a-

service and backup rotation options? 

Choose 2 answers 

A. Amazon S3 

B. Amazon RDS 

C. Amazon EBS 

D. Amazon Red shift 

Answer: B,D 

Q20. – (Topic 2) 

A user is trying to setup a recurring Auto Scaling process. The user has setup one process to scale up every day at 8 am and scale down at 7 PM. The user is trying to setup another recurring process which scales up on the 1st of every month at 8 AM and scales down the same day at 7 PM. What will Auto Scaling do in this scenario? 

A. Auto Scaling will execute both processes but will add just one instance on the 1st 

B. Auto Scaling will add two instances on the 1st of the month 

C. Auto Scaling will schedule both the processes but execute only one process randomly 

D. Auto Scaling will throw an error since there is a conflict in the schedule of two separate Auto Scaling Processes 

Answer:

Explanation: 

Auto Scaling based on a schedule allows the user to scale the application in response to predictable load changes. The user can also configure the recurring schedule action which will follow the Linux cron format. As per Auto Scaling, a scheduled action must have a unique time value. If the user attempts to schedule an activity at a time when another existing activity is already scheduled, the call will be rejected with an error message noting the conflict.