As a developer, you are looking at making use of AWS Cognito Sync. Which of the below are features of this service? Choose 3 answers from the options given below.

Answer options:

A.Cross-device syncing of application-related user data
B.Synching of offline data back to AWS
C.Push Sync Notification
D.Sync data with DynamoDB

Answer – A, B and C
The AWS Documentation mentions the following.
Amazon Cognito Sync is an AWS service and client library that enable cross-device syncing of application-related user data. You can use it to synchronize user profile data across mobile devices and web applications. The client libraries cache data locally so your app can read and write data regardless of device connectivity status. When the device is online, you can synchronize data, and if you set up push sync, notify other devices immediately that an update is available.
Since the documentation clearly gives the features of this service, all other options are invalid.
For more information on AWS Cognito Sync, please refer to the below URL-
https://docs.aws.amazon.com/cognito/latest/developerguide/getting-started-with-cognito-sync.html