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Amazon DVA-C01 Practice Test - Questions Answers, Page 2

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You are writing to a DynamoDB table and receive the following exception:" ProvisionedThroughputExceededException". though according to your Cloudwatch metrics for the table, you are not exceeding your provisioned throughput. What could be an explanation for this?
A developer runs an application that uses an Amazon API Gateway REST API. The developer needs to implement a solution to proactively monitor the health of both API responses and latencies in case a deployment causes a service disruption despite passing deployment pipeline tests. The solution also must check for endpoint vulnerability and unauthorized changes to APIs. URLs, and website content. Which solution will meet these requirements?
You are providing AWS consulting services for a company developing a new mobile application that will be leveraging Amazon SNS Mobile Push for push notifications. In order to send direct notification messages to individual devices each device registration identifier or token needs to be registered with SNS; however the developers are not sure of the best way to do this. You advise them to:
During non-peak hours, a Developer wants to minimize the execution time of a full Amazon DynamoDB table scan without affecting normal workloads. The workloads average half of the strongly consistent read capacity units during non-peak hours. How would the Developer optimize this scan?
Which of the following are correct statements with policy evaluation logic in AWS Identity and Access Management? Choose 2 answers
A company is migrating a web application from on premises to AWS. The company needs to move session storage from the application code to a shared service as part of the migration. The session storage data must be encrypted at rest. Which AWS services meet these requirements? (Choose two.)
A developer has written the following 1AM policy to provide access to an Amazon S3 bucket: Which access does the policy allow regarding the s3:GetObject and s3:PutObject actions'?
An application stores payroll information nightly in DynamoDB for a large number of employees across hundreds of offices. Item attributes consist of individual 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 developer is integrating Amazon ElastiCache in an application. The cache will store data from a database. The cached data must populate real-time dashboards. Which caching strategy will meet these requirements?
Games-R-Us is launching a new game app for mobile devices. Users will log into the game using their existing Facebook account and the game will record player data and scoring information directly to a DynamoDB table. What is the most secure approach for signing requests to the DynamoDB API?

Question 11

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Which statements about DynamoDB are true? Choose 2 answers

A.
DynamoDB uses a pessimistic locking model
A.
DynamoDB uses a pessimistic locking model
Answers
B.
DynamoDB uses optimistic concurrency control
B.
DynamoDB uses optimistic concurrency control
Answers
C.
DynamoDB uses conditional writes for consistency
C.
DynamoDB uses conditional writes for consistency
Answers
D.
DynamoDB restricts item access during reads
D.
DynamoDB restricts item access during reads
Answers
E.
DynamoDB restricts item access during writes
E.
DynamoDB restricts item access during writes
Answers
Suggested answer: B, C

Question 12

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You are providing AWS consulting services for a company developing a new mobile application that will be leveraging Amazon SNS Mobile Push for push notifications. In order to send direct notification messages to individual devices each device registration identifier or token needs to be registered with SNS; however the developers are not sure of the best way to do this. You advise them to:

A.
Bulk upload the device tokens contained in a CSV file via the AWS Management Console.
A.
Bulk upload the device tokens contained in a CSV file via the AWS Management Console.
Answers
B.
Let the push notification service (e.g. Amazon Device Messaging) handle the registration.
B.
Let the push notification service (e.g. Amazon Device Messaging) handle the registration.
Answers
C.
Implement a token vending service to handle the registration.
C.
Implement a token vending service to handle the registration.
Answers
D.
Call the CreatePlatformEndPoint API function to register multiple device tokens.
D.
Call the CreatePlatformEndPoint API function to register multiple device tokens.
Answers
Suggested answer: D

Explanation:

https://docs.aws.amazon.com/sns/latest/dg/mobile-push-send-devicetoken.html

Question 13

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You are writing to a DynamoDB table and receive the following exception:" ProvisionedThroughputExceededException". though according to your Cloudwatch metrics for the table, you are not exceeding your provisioned throughput. What could be an explanation for this?

A.
You haven't provisioned enough DynamoDB storage instances
A.
You haven't provisioned enough DynamoDB storage instances
Answers
B.
You're exceeding your capacity on a particular Range Key
B.
You're exceeding your capacity on a particular Range Key
Answers
C.
You're exceeding your capacity on a particular Hash Key
C.
You're exceeding your capacity on a particular Hash Key
Answers
D.
You're exceeding your capacity on a particular Sort Key
D.
You're exceeding your capacity on a particular Sort Key
Answers
E.
E.
Answers
Suggested answer: C

Explanation:

A. You haven't provisioned enough DynamoDB storage instances

B. You're exceeding your capacity on a particular Range Key

C. You're exceeding your capacity on a particular Hash Key

D. You're exceeding your capacity on a particular Sort Key

E. You haven't configured DynamoDB Auto Scaling triggers

Answer: C

Explanation:

https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.CoreComponents.html#HowItWorks.CoreComponents.PrimaryKey https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.Partitions.html

https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/bp-partition-keydesign.html

Question 14

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Which of the following services are included at no additional cost with the use of the AWS platform? Choose 2 answers

A.
Simple Storage Service
A.
Simple Storage Service
Answers
B.
Elastic Compute Cloud
B.
Elastic Compute Cloud
Answers
C.
Auto Scaling
C.
Auto Scaling
Answers
D.
Elastic Load Balancing
D.
Elastic Load Balancing
Answers
E.
CloudFormation
E.
CloudFormation
Answers
F.
Simple Workflow Service
F.
Simple Workflow Service
Answers
Suggested answer: C, E

Question 15

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Your application is trying to upload a 6 GB file to Simple Storage Service and receive a “Your proposed upload exceeds the maximum allowed object size." error message. What is a possible solution for this?

A.
None, Simple Storage Service objects are limited to 5 GB
A.
None, Simple Storage Service objects are limited to 5 GB
Answers
B.
Use the multi-part upload API for this object
B.
Use the multi-part upload API for this object
Answers
C.
Use the large object upload API for this object
C.
Use the large object upload API for this object
Answers
D.
Contact support to increase your object size limit
D.
Contact support to increase your object size limit
Answers
E.
Upload to a different region
E.
Upload to a different region
Answers
Suggested answer: B

Explanation:

https://docs.aws.amazon.com/AmazonS3/latest/dev/mpuoverview.html

Question 16

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What AWS products and features can be deployed by Elastic Beanstalk? Choose 3 answers

A.
Auto scaling groups
A.
Auto scaling groups
Answers
B.
Route 53 hosted zones
B.
Route 53 hosted zones
Answers
C.
Elastic Load Balancers
C.
Elastic Load Balancers
Answers
D.
RDS Instances
D.
RDS Instances
Answers
E.
Elastic IP addresses
E.
Elastic IP addresses
Answers
F.
SQS Queues
F.
SQS Queues
Answers
Suggested answer: A, C, D

Explanation:

https://aws.amazon.com/elasticbeanstalk/faqs/Q: What are the Cloud resources powering my AWS Elastic Beanstalk application? AWS ElasticBeanstalk uses proven AWS features and services, such as Amazon EC2, Amazon RDS, Elastic LoadBalancing, Auto Scaling, Amazon S3, and Amazon SNS, to create an environment that runs your application. The current version of AWS Elastic Beanstalk uses the Amazon Linux AMI or the Windows Server 2012 R2 AMI.

Question 17

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Games-R-Us is launching a new game app for mobile devices. Users will log into the game using their existing Facebook account and the game will record player data and scoring information directly to a DynamoDB table. What is the most secure approach for signing requests to the DynamoDB API?

A.
Create an IAM user with access credentials that are distributed with the mobile app to sign the requests
A.
Create an IAM user with access credentials that are distributed with the mobile app to sign the requests
Answers
B.
Distribute the AWS root account access credentials with the mobile app to sign the requests
B.
Distribute the AWS root account access credentials with the mobile app to sign the requests
Answers
C.
Request temporary security credentials using web identity federation to sign the requests
C.
Request temporary security credentials using web identity federation to sign the requests
Answers
D.
Establish cross account access between the mobile app and the DynamoDB table to sign the requests
D.
Establish cross account access between the mobile app and the DynamoDB table to sign the requests
Answers
Suggested answer: C

Question 18

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Which of the following programming languages have an officially supported AWS SDK? Choose 2 answers

A.
Perl
A.
Perl
Answers
B.
PHP
B.
PHP
Answers
C.
Pascal
C.
Pascal
Answers
D.
Java
D.
Java
Answers
E.
SQL
E.
SQL
Answers
Suggested answer: B, D

Question 19

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A meteorological system monitors 600 temperature gauges, obtaining temperature samples every minute and saving each sample to a DynamoDB table. Each sample involves writing 1K of data and the writes are evenly distributed over time.

How much write throughput is required for the target table?

A.
1 write capacity unit
A.
1 write capacity unit
Answers
B.
10 write capacity units
B.
10 write capacity units
Answers
C.
60 write capacity units
C.
60 write capacity units
Answers
D.
600 write capacity units
D.
600 write capacity units
Answers
E.
3600 write capacity units
E.
3600 write capacity units
Answers
Suggested answer: B

Explanation:

https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ReadWriteCapacityMode.html

Question 20

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In DynamoDB, what type of HTTP response codes indicate that a problem was found with the client request sent to the service?

A.
5xx HTTP response code
A.
5xx HTTP response code
Answers
B.
200 HTTP response code
B.
200 HTTP response code
Answers
C.
306 HTTP response code
C.
306 HTTP response code
Answers
D.
4xx HTTP response code
D.
4xx HTTP response code
Answers
Suggested answer: D

Explanation:

https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html#ErrorCodeList

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