I don't think many of the Whizzlabs questions appear, other than those that are direct mimics of the example questions in AWS, and the reason for this is about complexity.
So for example, AWS sysops exam might say:
You maintain an application on AWS to provide development and test platforms for your developers.
Currently both environments consist of an m1.small EC2 instance. Your developers notice performance
degradation as they increase network load in the test environment.
How would you mitigate these performance issues in the test environment?
That is a clear question, that tests understanding of a simple feature. In comparison you have from whizzlabs:
A system admin is using server side encryption with AWS S3. Which of the below mentioned statements helps the user understand s3 encryption functionality?
So as you can see, the Whizzlabs questions is so badly worded as to effectively be nonsense. "To understand encryption functionality"... what could this mean? Well encryption functionality is the process of converting information or data into a code, especially to prevent unauthorized access. Perhaps the answer will help the user understand that? Lets see shall we:
Answer: "The user must send an AES-128 encrypted key"
Sorry but that is simply not what the question is asking. The question should say "what kind of encryption key should a user provide for server side encryption of S3?"
Not only that, the answer is actually not even accurate! As far as I'm aware it should be an AES-256 key that is used.
Finally, that is not examined in the course. You do not need to know information of that granularity.
Basically, whizzlabs is useful just to test knowledge in a very general sense, but doesn't really relate to the exam at all. It has been created by a team who clearly either have not sat the exam, or do not understand the course material.