A company is planning to develop an IoT application that will make use of a DynamoDB table. The structure of the table is given below.
Attribute Name
Type
Description
Device ID
String
Automatically generated GUID
Device type
String
The type name of the IoT device
Location
String
Place/ Area
Status code
String
The current status of the IoT device
Which of the following should be chosen as the partition key to ensure the MOST effective distribution of keys?

Answer options:

A.Device ID
B.Device type
C.Location
D.Status code

Answer – A
The most effective one will be the Device ID since this would ideally be unique and give a better key partition. Because of GUID provides programmatically unique Identity.
For more information on DynamoDB, please refer to the below URLs-
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/best-practices.html,
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/bp-partition-key-uniform-load.html