Simulation DVA-C01 Bundle 2021

NEW QUESTION 1
A user is planning to host a scalable dynamic web application on AWS. Which of the services may not be required by the user to achieve automated scalability?

• A. CIoudWatch
• B. S3
• C. AutoScaIing
• D. AWS EC2 instances

Answer: B

Explanation:
The user can achieve automated scaling by launching different EC2 instances and making them a part of an ELB. Cloudwatch will be used to monitor the resources and based on the scaling need it will trigger policies. AutoScaIing is then used to scale up or down the instances.
Reference: http://docs.aws.amazon.com/AutoScaIing/latest/DeveIoperGuide/NhatIsAutoScaIing.htmI

NEW QUESTION 2
In relation to Amazon SQS, how many queues and messages can you have per queue for each user?

• A. Unlimited
• B. 10
• C. 256
• D. 500

Answer: A

Explanation:
Amazon SQS supports an unlimited number of queues and unlimited number of messages per queue for each user. Please be aware that Amazon SQS automatically deletes messages that have been in the queue for more than 4 days.
Reference: https://aws.amazon.com/items/1343?externaIID=1343

NEW QUESTION 3
A user is launching an instance with EC2. Which of the below mentioned options does the user need to consider before launching an instance?

• A. Select the region where the instance is being launched.
• B. Select the instance type.
• C. All the options listed should be considered..
• D. Select the OS of the AM

Answer: C

Explanation:
Regarding Amazon EC2, when launching an instance, the user needs to select the region the instance would be launched from. While launching, the user needs to plan for the instance type and the OS of the instance.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-Iaunch-instance_|inux.htmI

NEW QUESTION 4
Which one of the following operations is NOT a DynamoDB operation?

• A. BatchWrite|tem
• B. DescribeTabIe
• C. BatchGetItem
• D. BatchDeIeteItem

Answer: D

Explanation:
In DynamoDB, Deleteltem deletes a single item in a table by primary key, but BatchDeIeteItem doesn’t exist.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/operationIist.htmI

NEW QUESTION 5
In AWS Elastic Beanstalk, you can update your deployed application even while it is part of a running environment. For a Java application, you can also use to update your deployed application.

• A. the AWS Toolkit for Eclipse
• B. the AWS Toolkit for Visual Studio
• C. the AWS Toolkit for JVM
• D. the AWS Toolkit for Netbeans

Answer: A

Explanation:
In AWS Elastic Beanstalk, you can update your deployed application, even while it is part of a running environment. For a Java application, you can also use the AWS Toolkit for Eclipse to update your deployed application.
Reference: http://docs.aws.amazon.com/elasticbeanstaIk/latest/dg/GettingStarted.WaIkthrough.htmI

NEW QUESTION 6
AWS Elastic Beanstalk stores your application files and optionally server log files in .

• A. Amazon Storage Gateway
• B. Amazon Glacier
• C. Amazon EC2
• D. Amazon S3

Answer: D

Explanation:
AWS Elastic Beanstalk stores your application files and optionally server log files in Amazon S3. If you are using the AWS Management Console, Git, the AWS Toolkit for Visual Studio, or AWS Toolkit for Eclipse, an Amazon S3 bucket will be created in your account for you and the files you upload will be automatically copied from your local client to Amazon S3. Optionally, you may configure Elastic Beanstalk to copy your server log files every hour to Amazon S3. You do this by editing the environment configuration settings.
Reference: http://docs.aws.amazon.com/elasticbeanstaIk/latest/dg/AWSHowTo.htmI

NEW QUESTION 7
What is one key difference between an Amazon EBS-backed and an instance-store backed instance?

• A. Virtual Private Cloud requires EBS backed instances
• B. Amazon EBS-backed instances can be stopped and restarted
• C. Auto scaling requires using Amazon EBS-backed instances.
• D. Instance-store backed instances can be stopped and restarte

Answer: B

NEW QUESTION 8
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. Open the port for an ELB static IP in the EC2 security group
• B. Configure the security group of EC2, which allows access to the ELB source security group
• C. Configure the EC2 instance so that it only listens on the ELB port
• D. Configure the security group of EC2, which allows access only to the ELB listener

Answer: B

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

NEW QUESTION 9
A user has created a queue named "myqueue" with SQS. There are four messages published to queue which are not received by the consumer yet. If the user tries to delete the queue, what will happen?

• A. A user can never delete a queue manuall
• B. AWS deletes it after 30 days of inactMty on queue
• C. It will initiate the delete but wait for four days before deleting until all messages are deleted automatically.
• D. It will ask user to delete the messages first
• E. It will delete the queue

Answer: D

Explanation:
SQS allows the user to move data between distributed components of applications so they can perform different tasks without losing messages or requiring each component to be always available. The user can delete a queue at any time, whether it is empty or not. It is important to note that queues retain
messages for a set period of time. By default, a queue retains messages for four days. Reference:
http://docs.aws.amazon.com/AWSSimpIeQueueService/latest/SQSDeveIoperGuide/SQSConcepts.html

NEW QUESTION 10
A user is trying to share a video file with all his friends. Which of the below mentioned AWS services will be cheapest and easy to use?

• A. AWS S3
• B. AWS EC2
• C. AWS RRS
• D. AWS Glacier

Answer: C

Explanation:
AWS RRS provides the same functionality as AWS S3, but at a cheaper rate. It is ideally suited for non mission critical applications. It provides less durability than S3, but is a cheaper option.
Reference: http://docs.aws.amazon.com/AmazonS3/Iatest/dev/UsingRRS.htmI

NEW QUESTION 11
Which of the below mentioned options is a must to have an element as a part of the IAM policy?

• A. Condition
• B. ID
• C. Statement
• D. Version

Answer: C

Explanation:
The statement is the main element of the IAM policy and it is a must for a policy. Elements such as condition, version and ID are not required.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/AccessPoIicyLanguage_EIementDescriptions.html

NEW QUESTION 12
ExamKiIIer has three AWS accounts. They have created separate IAM users within each account. ExamKiIIer wants a single IAM console URL such as https://examkiIIer.signin.aws.amazon.com/consoIe/ for all account users. How can this be achieved?

• A. Merge all the accounts with consolidated billing
• B. Create the same account alias with each account ID
• C. It is not possible to have the same IAM account login URL for separate AWS accounts
• D. Create the S3 bucket with an alias name and use the redirect rule to forward requests to various accounts

Answer: C

Explanation:
If a user wants the URL of the AWS IAM sign-in page to have a company name instead of the AWS account ID, he can create an alias for his AWS account ID. The alias should be unique.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/AccountAIias.html

NEW QUESTION 13
A user is trying to create a policy for an IAM user from the AWS console. Which of the below mentioned options is not available to the user while configuring policy?

• A. Use policy generator to create policy
• B. Use custom policy to create policy
• C. Use policy simulator to create policy
• D. Assign No permission

Answer: C

Explanation:
When a user is trying to create a policy from the AWS console, it will have options such as create policy from templates or use a policy generator. The user can also define a custom policy or chose the option to have no permission. The policy simulator is not available in the console.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/IAMBestPractices.html

NEW QUESTION 14
A user has enabled the automated backup, but not specified the backup window. What will RDS do in this case?

• A. Will throw an error on instance launch
• B. RDS will take 3 AM — 3:30 AM as the default window
• C. RDS assigns a random time period based on the region
• D. Will not allow to launch a DB instance

Answer: C

Explanation:
If the user does not specify a preferred backup window while enabling an automated backup, Amazon RDS assigns a default 30-minute backup window which is selected at random from an 8-hour block of
time per region. Reference:
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.BackingUpAndRestoringAmazonR DSInstances.htmI

NEW QUESTION 15
When you create a table with a hash-and-range key, you must define one or more secondary indexes on that table.

• A. False, hash-range key is another name for secondary index
• B. False, it is optional
• C. True
• D. False, when you have Hash-Range key you cannot define Secondary index

Answer: B

Explanation:
When you create a table with a hash-and-range key in DynamoDB, you can also define one or more secondary indexes on that table.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LSI.htmI

NEW QUESTION 16
In DynamoDB, a secondary index is a data structure that contains a subset of attributes from a table, along with an alternate key to support operations.

• A. None of the above
• B. Both
• C. Query
• D. Scan

Answer: C

Explanation:
In DynamoDB, a secondary index is a data structure that contains a subset of attributes from a table, along with an alternate key to support Query operations.
Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Secondarylndexes.htmI

NEW QUESTION 17
A user is creating an ELB with VPC. Which of the following options is available as a part of the "Add EC2 instances" page?

• A. Select Subnet
• B. Select IAM
• C. Select ENI
• D. Select VPC

Answer: A

Explanation:
When a user is launching an ELB with VPC, he/she has to select the options, such as subnet and security group before selecting the instances part of that subnet.
Reference:
http://docs.aws.amazon.com/EIasticLoadBaIancing/latest/Deve|operGuide/elb-getting-started.htmI

NEW QUESTION 18
An application stores payroll information nightly in DynamoDB for a large number of employees across hundreds of offices. Item attributes consist of indMdual name, office identifier, and cumulative daily hours. Managers run reports for ranges of names working in their office. One query is. "Return all Items in this office for names starting with A through E". Which table configuration will result in the lowest impact on provisioned throughput for this query?

• A. Configure the table to have a hash index on the name attribute, and a range index on the office identifier
• B. Configure the table to have a range index on the name attribute, and a hash index on the office identifier
• C. Configure a hash index on the name attribute and no range index
• D. Configure a hash index on the office Identifier attribute and no range index

Answer: B

NEW QUESTION 19
A user is enabling logging on a particular bucket. Which of the below mentioned options may be best suitable to allow access to the log bucket?

• A. Create an IAM policy and allow log access
• B. It is not possible to enable logging on the S3 bucket
• C. Create an IAM Role which has access to the log bucket
• D. Provide ACL for the logging group

Answer: D

Explanation:
The only recommended use case for the S3 bucket ACL is to grant the write permission to the Amazon S3 Log Delivery group to write access log objects to the user’s bucket.
Reference: http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-alternatives-guidelines.html

NEW QUESTION 20
An orgAMzation has 10 departments. The orgAMzation wants to track the AWS usage of each department. Which of the below mentioned options meets the requirement?

• A. Setup IAM groups for each department and track their usage
• B. Create separate accounts for each department, but use consolidated billing for payment and tracking
• C. Create separate accounts for each department and track them separately
• D. Setup IAM users for each department and track their usage

Answer: B

Explanation:
The cost of an IAM user or groups can never be tracked separately for the purpose of billing. The best solution in this case is to create a separate account for each department and use consolidated billing. Reference: http://docs.aws.amazon.com/IAM/|atest/UserGuide/|AM_|ntroduction.htmI

NEW QUESTION 21
When a Simple Queue Service message triggers a task that takes 5 minutes to complete, which process below will result in successful processing of the message and remove it from the queue while minimizing the chances of duplicate processing?

• A. Retrieve the message with an increased visibility timeout, process the message, delete the message from the queue
• B. Retrieve the message with an increased visibility timeout, delete the message from the queue, process the message
• C. Retrieve the message with increased DeIaySeconds, process the message, delete the message from the queue
• D. Retrieve the message with increased DeIaySeconds, delete the message from the queue, process the message

Answer: A

NEW QUESTION 22
You attempt to store an object in the US-STANDARD region in Amazon S3, and receive a confirmation that it has been successfully stored. You then immediately make another API call and attempt to read this object. S3 tells you that the object does not exist
What could explain this behavior?

• A. US-STANDARD uses eventual consistency and it can take time for an object to be readable in a bucket
• B. Objects in Amazon S3 do not become visible until they are replicated to a second region.
• C. US-STANDARD imposes a 1 second delay before new objects are readable.
• D. You exceeded the bucket object limit, and once this limit is raised the object will be visible.

Answer: A

NEW QUESTION 23
You run an ad-supported photo sharing website using S3 to serve photos to visitors of your site. At some point you find out that other sites have been linking to the photos on your site, causing loss to your business.
What is an effective method to mitigate this?

• A. Store photos on an EBS volume ofthe web server
• B. Remove public read access and use signed URLs with expiry dates.
• C. Use C|oudFront distributions for static content.
• D. Block the IPs of the offending websites in Security Group

Answer: B

NEW QUESTION 24
A user has launched an EC2 instance and installed a website with the Apache webserver. The webserver is running but the user is not able to access the website from the internet. What can be the possible reason for this failure?

• A. The security group of the instance is not configured properly.
• B. The instance is not configured with the proper key-pairs.
• C. The Apache website cannot be accessed from the internet.
• D. Instance is not configured with an elastic I

Answer: A

Explanation:
In Amazon Web Services, when a user has configured an instance with Apache, the user needs to ensure that the ports in the security group are opened as configured in Apache config. E.g. If Apache is running on port 80, the user should open port 80 in the security group.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html

NEW QUESTION 25
A user is creating multiple IAM users. What advice should be given to him to enhance the security?

• A. Grant least prMleges to the indMdual user
• B. Grant all higher prMleges to the group
• C. Grant less prMleges for user, but higher prMleges for the group
• D. Grant more prMleges to the user, but least prMleges to the group

Answer: A

Explanation:
It is a recommended rule that the root user should grant the least prMleges to the IAM user or the group. The higher the prMleges, the more problems it can create.
Reference: http://docs.aws.amazon.com/IAM/latest/UserGuide/IAMBestPractices.htmI

NEW QUESTION 26
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