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AWS Certified Developer Associate Exam Dumps

Question #211

If an application is storing hourly log files from thousands of instances from a high traffic web site, which naming scheme would give optimal performance on S3?

  • A. Sequential
  • B. instanceID_log-HH-DD-MM-YYYY
  • C. instanceID_log-YYYY-MM-DD-HH
  • D. HH-DD-MM-YYYY-log_instanceID
  • E. YYYY-MM-DD-HH-log_instanceID

Correct Answer: D

Question #212

Which of the following statements about SQS is true?

  • A. Messages will be delivered exactly once and messages will be delivered in First in, First out order
  • B. Messages will be delivered exactly once and message delivery order is indeterminate
  • C. Messages will be delivered one or more times and messages will be delivered in First in, First out order
  • D. Messages will be delivered one or more times and message delivery order is indeterminate

Correct Answer: D

Question #213

A corporate web application is deployed within an Amazon VPC, and is connected to the corporate data center via IPSec VPN. The application must authenticate against the on-premise LDAP server. Once authenticated, logged-in users can only access an S3 keyspace specific to the user.
Which two approaches can satisfy the objectives? (Choose two.)

  • A. The application authenticates against LDAP. The application then calls the IAM Security Service to login to IAM using the LDAP credentials. The application can use the IAM temporary credentials to access the appropriate S3 bucket.
  • B. The application authenticates against LDAP, and retrieves the name of an IAM role associated with the user. The application then calls the IAM Security Token Service to assume that IAM Role. The application can use the temporary credentials to access the appropriate S3 bucket.
  • C. The application authenticates against IAM Security Token Service using the LDAP credentials. The application uses those temporary AWS security credentials to access the appropriate S3 bucket.
  • D. Develop an identity broker which authenticates against LDAP, and then calls IAM Security Token Service to get IAM federated user credentials. The application calls the identity broker to get IAM federated user credentials with access to the appropriate S3 bucket.
  • E. Develop an identity broker which authenticates against IAM Security Token Service to assume an IAM Role to get temporary AWS security credentials. The application calls the identity broker to get AWS

Correct Answer: BD

Question #214

Company B provides an online image recognition service and utilizes SQS to decouple system components for scalability The SQS consumers poll the imaging queue as often as possible to keep end-to-end throughput as high as possible. However, Company B is realizing that polling in tight loops is burning CPU cycles and increasing costs with empty responses.
How can Company B reduce the number of empty responses?

  • A. Set the imaging queue visibility Timeout attribute to 20 seconds
  • B. Set the Imaging queue ReceiveMessageWaitTimeSeconds attribute to 20 seconds
  • C. Set the imaging queue MessageRetentionPeriod attribute to 20 seconds
  • D. Set the DelaySeconds parameter of a message to 20 seconds

Correct Answer: B

Question #215

An Amazon S3 bucket, “myawsbucket” is configured with website hosting in Tokyo region, what is the region- specific website endpoint?

  • A. www.myawsbucket.ap-northeast-1.amazonaws.com
  • B. myawsbucket.s3-website-ap-northeast-1.amazonawscom
  • C. myawsbucket.amazonaws.com
  • D. myawsbucket.tokyo.amazonaws.com

Correct Answer: B

Question #216

You are inserting 1000 new items every second in a DynamoDB table. Once an hour these items are analyzed and then are no longer needed. You need to minimize provisioned throughput, storage, and API calls.
Given these requirements, what is the most efficient way to manage these Items after the analysis?

  • A. Retain the items in a single table
  • B. Delete items individually over a 24 hour period
  • C. Delete the table and create a new table per hour
  • D. Create a new table per hour

Correct Answer: C

Question #217

You have written an application that uses the Elastic Load Balancing service to spread traffic to several web servers. Your users complain that they are sometimes forced to login again in the middle of using your application, after they have already logged in. This is not behavior you have designed.
What is a possible solution to prevent this happening?

  • A. Use instance memory to save session state.
  • B. Use instance storage to save session state.
  • C. Use EBS to save session state
  • D. Use ElastiCache to save session state.
  • E. Use Glacier to save session slate.

Correct Answer: D

Question #218

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 of the web server
  • B. Remove public read access and use signed URLs with expiry dates.
  • C. Use CloudFront distributions for static content.
  • D. Block the IPs of the offending websites in Security Groups.

Correct Answer: B

Question #219

Which statements about DynamoDB are true? (Choose two.)

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

Correct Answer: BC

Question #220

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.
  • B. Let the push notification service (e.g. Amazon Device Messaging) handle the registration.
  • C. Implement a token vending service to handle the registration.
  • D. Call the CreatePlatformEndPoint API function to register multiple device tokens.

Correct Answer: D

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