I have Passed AWS Solution architect exam 2 weeks back.
Almost nearly 30 questions came as similar pattern of Whizlab practice tests . I definitely recommend to take whizlab questions before taking the exam.
I prepared: 1. Udemy - Ryan Kroonberg 2. Whizlab practice test 3. tutorialsdojo.com 4. Jon Bonso Practice test.
In the real exam AWS they asked me more about scenario based questions.