A user is planning to host a mobile game on EC2 which sends notifications to active users on either high score or the addition of new features. The user should get this notification when he is online on his mobile device. Which of the below mentioned AWS services can help achieve this functionality?

Correct Answer:A
Amazon Simple Notification Service (Amazon SNS) is a fast, filexible, and fully managed push messaging service. Amazon SNS makes it simple and cost-effective to push to mobile devices, such as iPhone, iPad, Android, Kindle Fire, and internet connected smart devices, as well as pushing to other distributed services.
Reference: http://aws.amazon.com/sns

What kind of service is provided by AWS DynamoDB?

Correct Answer:B
DynamoDB is a fast, fully managed NoSQL database service. Reference: http://aws.amazon.com/dynamodb/

Regarding Amazon SNS, to send messages to a queue through a topic, you must subscribe the queue to the Amazon SNS topic. You specify the queue by its .

Correct Answer:A
In Amazon SNS, to send messages to a queue through a topic, you must subscribe the queue to the Amazon SNS topic. You specify the queue by its ARN.
Reference: http://docs.aws.amazon.com/sns/latest/dg/SendMessageToSQS.htmI

When you register an actMty in Amazon SWF, you provide the following information, except:

Correct Answer:C
When designing an Amazon SWF workflow, you precisely define each of the required actMties. You then register each actMty with Amazon SWF as an actMty type. When you register the actMty, you provide information such as a name and version, and some timeout values based on how long you expect the actMty to take.
Reference: http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-intro-to-swf.html

A user has created a MySQL RDS instance. Which of the below mentioned options is mandatory to configure while creating an instance?

Correct Answer:A
When creating an RDS instance, the user needs to specify whether it is Nlulti AZ or not. If the user does not provide the value for the zone, the maintenance window or automated backup window, RDS will automatically select the value.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.lV|u|tiAZ.htmI

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.

Correct Answer:C
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