[2021-New] Amazon AWS-SysOps Dumps With Update Exam Questions (131-140)

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AWS-SysOps Exam Questions - Online Test

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Q1. - (Topic 2)

A user has enabled the Multi AZ feature with the MS SQL RDS database server. Which of the below

mentioned statements will help the user understand the Multi AZ feature better?

A. In a Multi AZ, AWS runs two DBs in parallel and copies the data asynchronously to the replica copy

B. In a Multi AZ, AWS runs two DBs in parallel and copies the data synchronously to the replica copy

C. In a Multi AZ, AWS runs just one DB but copies the data synchronously to the standby replica

D. AWS MS SQL does not support the Multi AZ feature

Answer: C

Explanation:

Amazon RDS provides high availability and failover support for DB instances using Multi-AZ deployments. In a Multi-AZ deployment, Amazon RDS automatically provisions and maintains a synchronous standby replica in a different Availability Zone. The primary DB instance is synchronously replicated across Availability Zones to a standby replica to provide data redundancy, eliminate I/O freezes, and minimize latency spikes during system backups. Running a DB instance with high availability can enhance availability during planned system maintenance, and help protect your databases against DB instance failure and Availability Zone disruption.Note that the high-availability feature is not a scaling solution for read-only scenarios; you cannot use a standby replica to serve read traffic. To service read-only traffic, you should use a read replica.

Q2. - (Topic 3)

A user has created a subnet in VPC and launched an EC2 instance within it. The user has not selected the option to assign the IP address while launching the instance. Which of the

below mentioned statements is true with respect to this scenario?

A. The instance will always have a public DNS attached to the instance by default

B. The user can directly attach an elastic IP to the instance

C. The instance will never launch if the public IP is not assigned

D. The user would need to create an internet gateway and then attach an elastic IP to the instance to connect from internet

Answer: D

Explanation:

A Virtual Private Cloud (VPC. is a virtual network dedicated to the user’s AWS account. A user can create a subnet with VPC and launch instances inside that subnet. When the user is launching an instance he needs to select an option which attaches a public IP to the instance. If the user has not selected the option to attach the public IP then it will only have a private IP when launched. The user cannot connect to the instance from the internet. If the user wants an elastic IP to connect to the instance from the internet he should create an internet gateway and assign an elastic IP to instance.

Q3. - (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: D

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.

Q4. - (Topic 2)

An application is generating a log file every 5 minutes. The log file is not critical but may be required only for verification in case of some major issue. The file should be accessible over the internet whenever required. Which of the below mentioned options is a best possible storage solution for it?

A. AWS S3

B. AWS Glacier

C. AWS RDS

D. AWS RRS

Answer: D

Explanation:

Amazon S3 stores objects according to their storage class. There are three major storage classes: Standard, Reduced Redundancy Storage and Glacier. Standard is for AWS S3 and provides very high durability. However, the costs are a little higher. Glacier is for archival and the files are not available over the internet. Reduced Redundancy Storage is for less critical files. Reduced Redundancy is little cheaper as it provides less durability in comparison to S3. In this case since the log files are not mission critical files, RRS will be a better option.

Q5. - (Topic 1)

You are using ElastiCache Memcached to store session state and cache database queries in your infrastructure. You notice in CloudWatch that Evictions and GetMisses are Doth very high.

What two actions could you take to rectify this?

Choose 2 answers

A. Increase the number of nodes in your cluster

B. Tweak the max_item_size parameter

C. Shrink the number of nodes in your cluster

D. Increase the size of the nodes in the duster

Answer: B,D

Q6. - (Topic 3)

A user has created an Auto Scaling group with default configurations from CLI. The user wants to setup the CloudWatch alarm on the EC2 instances, which are launched by the Auto Scaling group. The user has setup an alarm to monitor the CPU utilization every minute. Which of the below mentioned statements is true?

A. It will fetch the data at every minute but the four data points [corresponding to 4 minutes] will not have value since the EC2 basic monitoring metrics are collected every five minutes

B. It will fetch the data at every minute as detailed monitoring on EC2 will be enabled by the default launch configuration of Auto Scaling

C. The alarm creation will fail since the user has not enabled detailed monitoring on the EC2 instances

D. The user has to first enable detailed monitoring on the EC2 instances to support alarm monitoring at every minute

Answer: B

Explanation:

CloudWatch is used to monitor AWS as well as the custom services. To enable detailed instance monitoring for a new Auto Scaling group, the user does not need to take any extra steps. When the user creates an Auto Scaling launch config using CLI, each launch configuration contains a flag named InstanceMonitoring.Enabled. The default value of this flag is true. Thus, by default detailed monitoring will be enabled for Auto Scaling as well as for all the instances launched by that Auto Scaling group.

Q7. - (Topic 3)

How can you secure data at rest on an EBS volume?

A. Encrypt the volume using the S3 server-side encryption service.

B. Attach the volume to an instance using EC2's SSL interface.

C. Create an IAM policy that restricts read and write access to the volume.

D. Write the data randomly instead of sequentially.

E. Use an encrypted file system m top of the EBS volume.

Answer: C

Explanation: Reference:

http://docs.aws.amazon.com/IAM/latest/UserGuide/policies_examples.html

Q8. - (Topic 2)

A user is trying to understand the ACL and policy for an S3 bucket. Which of the below mentioned policy

permissions is equivalent to the WRITE ACL on a bucket?

A. s3:GetObjectAcl

B. s3:GetObjectVersion

C. s3:ListBucketVersions

D. s3:DeleteObject

Answer: D

Explanation:

Amazon S3 provides a set of operations to work with the Amazon S3 resources. Each AWS S3 bucket can have an ACL (Access Control List. or bucket policy associated with it. The WRITE ACL list allows the other AWS accounts to write/modify to that bucket. The equivalent S3 bucket policy permission for it is s3:DeleteObject.

Q9. - (Topic 2)

A user is planning to use AWS Cloudformation. Which of the below mentioned functionalities does not help him to correctly understand Cloudfromation?

A. Cloudformation follows the DevOps model for the creation of Dev & Test

B. AWS Cloudfromation does not charge the user for its service but only charges for the AWS resources created with it

C. Cloudformation works with a wide variety of AWS services, such as EC2, EBS, VPC, IAM, S3, RDS,

ELB, etc

D. CloudFormation provides a set of application bootstrapping scripts which enables the user to install Software

Answer: A

Explanation:

AWS Cloudformation is an application management tool which provides application modelling, deployment, configuration, management and related activities. It supports a wide variety of AWS services, such as EC2, EBS, AS, ELB, RDS, VPC, etc. It also provides application bootstrapping scripts which enable the user to install software packages or create folders. It is free of the cost and only charges the user for the services created with it. The only challenge is that it does not follow any model, such as DevOps; instead customers can define templates and use them to provision and manage the AWS resources in an orderly way.

Q10. - (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