I want to be honest about something.
My first attempt at JS-Dev-101 did not go the way I expected. Not because I had not studied. I had spent a month on it. Variables, scope, closures, the this keyword, modules, all of it. I felt solid going in.

Then I sat down and started reading the actual questions. Something felt off immediately.
The code snippets were short. Sometimes just four or five lines. But I kept second-guessing myself on outputs I should have known cold. I would trace through the logic, pick an answer, then immediately doubt it. I failed by a small margin and spent the next two weeks trying to understand what actually happened.

Here is what I figured out.
I had been studying JavaScript behavior in isolation. I understood what this refers to in a regular function versus an arrow function when I read about it. But the exam puts that same concept inside a real scenario. A developer is building a component. A method gets passed as a callback. What does this point to now? Suddenly, the concept I thought I knew had three extra moving parts I had never practiced together.

The gap was not knowledge. It was an application in context.
What actually helped me close that gap was ITExamsTopics. The questions there are framed exactly the way the real exam frames them. Not definitions, not isolated syntax checks. Actual scenarios with actual constraints where you have to think through the execution, not just recall a rule. That kind of practice rewired how I approached every question.

Second attempt felt completely different. Same topics, same material, different mindset going in.

If you are preparing for JS-Dev-101 and your practice scores are inconsistent, you are probably not missing content. You are missing the habit of executing code in your head before you look at the options.
Which topic is tripping you up the most right now?