[2021-New] Amazon AWS-Certified-Developer-Associate Dumps With Update Exam Questions (21-30)

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Q1. is a task coordination and state management service for cloud applications.

A. Amazon SES

B. Amazon SWF

C. Amazon FPS

D. Amazon SNS

Answer: B

Explanation:

Amazon Simple Workflow (Amazon SWF) is a task coordination and state management service for cloud applications. With Amazon SWF, you can stop writing complex glue-code and state machinery and invest more in the business logic that makes your applications unique.

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

Q2. A user has configured a bucket S3 to host a static website. What difference will there be when static website hosting is enabled?

A. It will help the user identify this bucket as the website root to map with the domain

B. It will create a new version of the bucket

C. It will not make any difference, but will help the user to configure the error page

D. It will provide the region specific website endpoint

Answer: D

Explanation:

To host a static website, the user needs to configure an Amazon S3 bucket for website hosting and then upload the website contents to the bucket. The website is then available at the region-specific website endpoint of the bucket.

Reference: http://docs.aws.amazon.com/AmazonS3/latest/dev/WebsiteHosting.htmI

Q3. What does Amazon SQS provide?

A. An asynchronous message queue service.

B. A Simple Query Sewer, managed directly by Amazon Web Services.

C. None of these.

D. A synchronous message queue service.

Answer: A

Explanation:

Amazon SQS stands for Simple Queue Services, and provides a cost-effective way to decouple the components of your application through an asynchronous message queue service

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

Q4. A user is planning to host a web server as well as an app server on a single EC2 instance which is a part of the public subnet of a VPC. How can the user setup to have two separate public IPs and separate security groups for both the application as well as the web server?

A. Launch a VPC instance with two network interfaces. Assign a separate security group to each and AWS will assign a separate public IP to them.

B. Launch VPC with two separate subnets and make the instance a part of both the subnets.

C. Launch a VPC instance with two network interfaces. Assign a separate security group and elastic IP to them.

D. Launch a VPC with ELB such that it redirects requests to separate VPC instances of the public subnet.

Answer: C

Explanation:

If you need to host multiple websites(with different IPs) on a single EC2 instance, the following is the suggested method from AWS.

Launch a VPC instance with two network interfaces

Assign elastic IPs from VPC EIP pool to those interfaces (Because, when the user has attached more than one network interface with an instance, AWS cannot assign public IPs to them.)

Assign separate Security Groups if separate Security Groups are needed

This scenario also helps for operating network appliances, such as firewalls or load balancers that have multiple private IP addresses for each network interface.

Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/MuItipIeIP.html

Q5. A user has attached an EBS volume to a running Linux instance as a "/dev/sdf" device. The user is unable to see the attached device when he runs the command "df -h". What is the possible reason for this?

A. The volume is not in the same AZ of the instance

B. The volume is not formatted

C. The volume is not attached as a root device

D. The volume is not mounted

Answer: D

Explanation:

When a user creates an EBS volume and attaches it as a device, it is required to mount the device. If the device/volume is not mounted it will not be available in the listing.

Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AmazonEBS.htmI

Q6. A user is planning to make a mobile game which can be played online or offline and will be hosted on EC2.

The user wants to ensure that if someone breaks the highest score or they achieve some milestone they can inform all their colleagues through email. Which of the below mentioned AWS services helps achieve this goal?

A. AWS Simple Workflow Service.

B. AWS Simple Queue Service.

C. Amazon Cognito

D. AWS Simple Email Service.

Answer: D

Explanation:

Amazon Simple Email Service (Amazon SES) is a highly scalable and cost-effective email-sending service for businesses and developers. It integrates with other AWS services, making it easy to send emails from applications that are hosted on AWS.

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

Q7. You are using Amazon SQS and are getting a "Queue Deleted RecentIy" error. What is wrong?

A. The message is too big

B. You have incorrect permissions

C. Another user has deleted the queue

D. If you delete a queue, you need to wait for at least 60 seconds before creating a queue with the same name

Answer: D

Explanation:

If you delete a queue, you need to wait for at least 60 seconds before creating a queue with the same name. Please note that when you delete a queue, the deletion process takes up to 60 seconds. Requests you send to a recently deleted queue might succeed during the 60-second period. For example, a SendlVIessage request might succeed, but after 60 seconds the queue and that message you sent no longer exists.

Reference: https://aws.amazon.com/items/1343?externaI|D=1343

Q8. True or False: In DynamoDB, Scan operations are always eventually consistent.

A. No, scan is like Query operation

B. Yes

C. No, scan is strongly consistent by default

D. No, you can optionally request strongly consistent scan.

Answer: B

Explanation:

In DynamoDB, Scan operations are always eventually consistent.

Reference: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/APISummary.htmI

Q9. can be used to bootstrap both the Chef Server and Chef Client software on your EC2 instances.

A. AWS CIoudFormation

B. AWS Elastic Beanstalk

C. AWS OpsWorks

D. Amazon Glacier

Answer: A

Explanation:

AWS CIoudFormation can be used to bootstrap both the Chef Server and Chef Client software on your EC2 instances.

Reference: http://aws.amazon.com/c|oudformation/faqs/

Q10. When AutoScaIing is launching a new instance based on condition, which of the below mentioned policies will it follow?

A. Based on the criteria defined with cross zone Load balancing

B. Launch an instance which has the highest load distribution

C. Launch an instance in the AZ with the fewest instances

D. Launch an instance in the AZ which has the highest instances

Answer: C

Explanation:

AutoScaIing attempts to distribute instances evenly between the Availability Zones that are enabled for the user’s AutoScaIing group. Auto Scaling does this by attempting to launch new instances in the Availability Zone with the fewest instances.

Reference:http://docs.aws.amazon.com/AutoScaIing/latest/Deve|operGuide/AS_Concepts.htmI