A company is using the IoT service for storing data from multiple IoT devices. They want to ensure that they can get the state of a device even if it is disconnected from the IoT service. Which of the following can help achieve this?

Answer options:

A.Using Device shadows
B.Using Rules
C.Using Jobs
D.Using Device Defender

Answer – A
The AWS Documentation mentions the following
A device`s shadow is a JSON document that is used to store and retrieve current state information for a device. The Device Shadow service maintains a shadow for each device you connect to AWS IoT. You can use the shadow to get and set the state of a device over MQTT or HTTP, regardless of whether the device is connected to the Internet
Option B is incorrect since this is used for devices to Interact with other AWS services
Option C is incorrect since this is used to define a set of remote operations that are sent to and executed on one or more devices connected to AWS IoT
Option D is incorrect since this is used to audit the configuration of your devices, monitor connected devices to detect abnormal behavior, and to mitigate security risks
For more information on Device shadows, please refer to the below URL
https://docs.aws.amazon.com/iot/latest/developerguide/iot-device-shadows.html
The AWS Documentation mentions the following
You use an analysis to create and interact with visuals and stories. You can think of an analysis as a container for a set of related visuals and stories, for example ones that are all applicable to a given business goal or key performance indicator. You can use multiple data sets in an analysis, although any given visual can only use one of those data sets.
For more information on working with Analysis, please refer to the below URL
https://docs.aws.amazon.com/quicksight/latest/user/working-with-analyses.html