Well, it depends, on the quality of the practice questions, if they are mimicking the original pattern and focus on the subject, then it would be beneficial for you, else it’s useless. But one the whole, taking AWS certified solutions architect associate practice exams are favorable in cracking the certification exam.
Because the test takers have mentioned that AWS associate level certification exams are tough, so practicing these questions does play a great role in getting your concepts clear and ready.
If you are a beginner, then I would suggest you take up the AWS training course before you take any practice exams. As this course from Intellipaat offers you guided projects and exercises to help you build your practical skills.
And in case you need a visual aid in better understanding, I would suggest you watch our YouTube video on AWS Associate Architect Certification.