You work for a start-up firm developing a new multilingual website to share images and video files. You are using EC2 instances to host this web application. To deliver these web content with the lowest latency to end-users, you have configured Amazon CloudFront, which forwards query strings to origin servers based on selected parameter values and caches web content based on these parameter values.
During the trial, it was observed that caching was not happening based upon query strings and these requests hit origin servers. Which of the following need to be checked to see if CloudFront is caching properly based upon query strings? (Select Three)

Answer options:

A.Make sure that the distribution is an RTMP distribution.
B.Make sure that the delimiter character between query string parameters is a `&` character.
C.Check if parameters` names and values use the same case.
D.Make sure that the delimiter character between query string parameters is a “/” character.
E.Make sure that the distribution is a web distribution.
F.Check only that the query parameter names use the lower case.

Correct Answers – B, C, E
CloudFront Query String Forwarding only supports Web distribution. For query string forwarding, the delimiter character must always be a `&` character. Parameters` names and values used in the query string are case sensitive. Parameter Names and Values should use the same case.
Option A is incorrect as CloudFront Query String Forwarding does not support RTMP distribution.
Option D is incorrect as Delimiter Character should always be `&`, not `\` character.
Option F is incorrect as in the case of Parameters in the query string, both the parameters` names and values should use the same case.
For more information on Query String forwarding, refer to the following URL-
 https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/QueryStringParameters.html