Amazon Simple Queue Service (SQS)

Question 1 of 14

1. Question

A user has developed an application, which is required to send the data to a NoSQL database. The user wants to decouple the data sending such that the application keeps processing and sending data but does not wait for an acknowledgement of DB. Which of the below mentioned applications helps in this scenario?

AWS Simple Notification Service
AWS Simple Workflow
AWS Simple Queue Service
AWS Simple Storage Service

Question 2 of 14

2. Question

Which AWS service can help design architecture to persist in-flight transactions?

Elastic IP Address
SQS
Amazon CloudWatch
Amazon ElastiCache

Question 3 of 14

3. Question

A company has a workflow that sends video files from their on-premise system to AWS for transcoding. They use EC2 worker instances that pull transcoding jobs from SQS. Why is SQS an appropriate service for this scenario?

SQS guarantees the order of the messages.
SQS synchronously provides transcoding output.
SQS checks the health of the worker instances.
SQS helps to facilitate horizontal scaling of encoding tasks

Question 4 of 14

4. Question

Which statement best describes an Amazon SQS use case?

Automate the process of sending an email notification to administrators when the CPU utilization reaches 70% on production servers (Amazon EC2 instances)
Create a video transcoding website where multiple components need to communicate with each other, but can’t all process the same amount of work simultaneously
Coordinate work across distributed web services to process employee’s expense reports
Distribute static web content to end users with low latency across multiple countries

Question 5 of 14

5. Question

Your application provides data transformation services. Files containing data to be transformed are first uploaded to Amazon S3 and then transformed by a fleet of spot EC2 instances. Files submitted by your premium customers must be transformed with the highest priority. How should you implement such a system?

Use a DynamoDB table with an attribute defining the priority level. Transformation instances will scan the table for tasks, sorting the results by priority level.
Use Route 53 latency based-routing to send high priority tasks to the closest transformation instances.
Use two SQS queues, one for high priority messages, and the other for default priority. Transformation instances first poll the high priority queue; if there is no message, they poll the default priority queue
Use a single SQS queue. Each message contains the priority level. Transformation instances poll high-priority messages first.

Question 6 of 14

6. Question

Your company plans to host a large donation website on Amazon Web Services (AWS). You anticipate a large and undetermined amount of traffic that will create many database writes. To be certain that you do not drop any writes to a database hosted on AWS. Which service should you use?

Amazon RDS with provisioned IOPS up to the anticipated peak write throughput.
Amazon Simple Queue Service (SQS) for capturing the writes and draining the queue to write to the database
Amazon ElastiCache to store the writes until the writes are committed to the database.
Amazon DynamoDB with provisioned write throughput up to the anticipated peak write throughput.

Question 7 of 14

7. Question

A customer has a 10 GB AWS Direct Connect connection to an AWS region where they have a web application hosted on Amazon Elastic Computer Cloud (EC2). The application has dependencies on an on-premises mainframe database that uses a BASE (Basic Available. Sort stale Eventual consistency) rather than an ACID (Atomicity. Consistency isolation. Durability) consistency model. The application is exhibiting undesirable behavior because the database is not able to handle the volume of writes. How can you reduce the load on your on-premises database resources in the most cost-effective way?

Use an Amazon Elastic Map Reduce (EMR) S3DistCp as a synchronization mechanism between the onpremises database and a Hadoop cluster on AWS.
Modify the application to write to an Amazon SQS queue and develop a worker process to flush the queue to the on-premises database
Modify the application to use DynamoDB to feed an EMR cluster which uses a map function to write to the on-premises database.
Provision an RDS read-replica database on AWS to handle the writes and synchronize the two databases using Data Pipeline.

Question 8 of 14

8. Question

An organization has created a Queue named “modularqueue” with SQS. The organization is not performing any operations such as SendMessage, ReceiveMessage, DeleteMessage, GetQueueAttributes, SetQueueAttributes, AddPermission, and RemovePermission on the queue. What can happen in this scenario?

AWS SQS sends notification after 15 days for inactivity on queue
AWS SQS can delete queue after 30 days without notification
AWS SQS marks queue inactive after 30 days
AWS SQS notifies the user after 2 weeks and deletes the queue after 3 weeks.

Question 9 of 14

9. Question

A user is using the AWS SQS to decouple the services. Which of the below mentioned operations is not supported by SQS?

SendMessageBatch
DeleteMessageBatch
CreateQueue
DeleteMessageQueue

Question 10 of 14

10. Question

A user has created a queue named “awsmodule” with SQS. One of the consumers of queue is down for 3 days and then becomes available. Will that component receive message from queue?

Yes, since SQS by default stores message for 4 days
No, since SQS by default stores message for 1 day only
No, since SQS sends message to consumers who are available that time
Yes, since SQS will not delete message until it is delivered to all consumers

Question 11 of 14

11. Question

A user has created a queue named “queue2” in US-East region with AWS SQS. The user’s AWS account ID is 123456789012. If the user wants to perform some action on this queue, which of the below Queue URL should he use?

http://sqs.us-east-1.amazonaws.com/123456789012/queue2
http://sqs.amazonaws.com/123456789012/queue2
http://sqs. 123456789012.us-east-1.amazonaws.com/queue2
http://123456789012.sqs.us-east-1.amazonaws.com/queue2

Question 12 of 14

12. Question

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 user can never delete a queue manually. AWS deletes it after 30 days of inactivity on queue
It will delete the queue
It will initiate the delete but wait for four days before deleting until all messages are deleted automatically.
I t will ask user to delete the messages first

Question 13 of 14

13. Question

You are building an online store on AWS that uses SQS to process your customer orders. Your backend system needs those messages in the same sequence the customer orders have been put in. How can you achieve that?

It is not possible to do this with SQS
You can use sequencing information on each message
You can do this with SQS but you also need to use SWF
Messages will arrive in the same order by default

Question 14 of 14

14. Question

A user has created a photo editing software and hosted it on EC2. The software accepts requests from the user about the photo format and resolution and sends a message to S3 to enhance the picture accordingly. Which of the below mentioned AWS services will help make a scalable software with the AWS infrastructure in this scenario?

AWS Glacier
AWS Elastic Transcoder
AWS Simple Notification Service
AWS Simple Queue Service

Amazon Simple Queue Service (SQS)