When you begin a practice exam, you are pestered relentlessly with advertisements about every 1-1/2 minutes, which is a major distraction from your studies. Advertising should happen at the end of the exam instead of after every two or three questions.
The REVEAL feature marks the answer as wrong, even when you had already selected the correct answer(s). When first selecting your answer, and then hitting reveal is not using the reveal option to complete the exam as was stated in the Developer Reply to the previous review made where that reviewer said the same thing.
The reveal feature can help study efforts by confirming that you had the correct answers or whether the topic needs to be studied more. The reveal button can be disabled until the answer has been selected.
Or, alternatively, instead of using the Reveal feature for this, the app could either show the correct answer after the user submits his answer but before moving on to the next question, OR, there could be a question review at the end of the practice test that shows the selected answer and the correct answer for each question.
A nice enhancement would be for a URL to be provided for each question that take the user to the Microsoft Webpage that discusses the question’s topic.