24 Common Mistakes Students Make During CBT Exams

Before the Exam

1. Skipping mock tests entirely. A lot of students study content but never actually sit down and take a full timed practice test on a computer. Reading and answering questions under pressure are two completely different things. Your fingers, your eyes, and your brain all need to get used to the format.

2. Not practicing on a computer. Some students do mock tests on paper or their phone. That helps with knowledge, but it does not prepare you for the actual experience of clicking through questions, navigating a test interface, or dealing with a mouse that does not scroll the way you expect.

3. Cramming the night before. This one keeps coming up every exam season. Last-minute cramming fills your short-term memory but exhausts your brain. You walk into the exam tired and foggy, and the things you crammed tend to blur together right when you need them most.

4. Arriving late or just on time. Showing up five minutes before the exam starts means you have no time to settle in, check your seat, get comfortable, or calm your nerves. The first few questions set the tone. If you are still anxious from rushing in, you are already behind.

5. Not eating or sleeping properly. It sounds basic, but a lot of students skip breakfast, stay up until 3 a.m. the night before, or show up dehydrated. Your brain runs on glucose and rest. Starving it right before a high-stakes exam is like draining your phone to 5% before a long trip.

6. Ignoring the exam environment. Different CBT centres have different setups. Some have old keyboards, some have small screens, some have noisy rooms. If you can, find out what the centre looks like before exam day. It removes one layer of surprise.

During the Exam: Timing and Navigation

7. Spending too long on one question. This is probably the single most common mistake. You hit a tough question, you know you should know the answer, and you sit there for three or four minutes trying to figure it out. Meanwhile, ten easier questions at the end never get touched. Move on. Flag it. Come back later.

8. Not reading the instructions. Every exam platform has slightly different rules. How many questions? Is there negative marking? Can you go back to previous questions? Students who skip the instructions sometimes do not even realize they can review their answers before submitting.

9. Rushing through easy questions. Some students try to save all their time for the hard questions by speeding through the ones they find easy. That leads to silly errors, misclicked answers, and questions misread because you were moving too fast.

10. Not using the flag or bookmark feature. Most CBT platforms let you mark a question and come back later. Students who do not use this feature end up either stuck on hard questions or forgetting which ones they wanted to revisit.

11. Submitting without reviewing. If the platform allows review, use it. Even a quick scan can catch an obvious error or a question you skipped without meaning to. Two minutes of review can save you several marks.

12. Watching the timer obsessively. Glancing at the clock is fine. Staring at it every 30 seconds creates anxiety that slows you down. Check in at planned intervals, maybe after every 20 questions, not constantly.

During the Exam: Answering Questions

13. Changing answers without good reason. Research consistently shows that your first instinct on a question is more often correct than your second guess, unless you have a specific reason to change it, like remembering a formula you forgot. Changing answers out of anxiety usually makes things worse.

14. Not reading all the options. Some students see option A, think it looks right, and select it without reading B, C, or D. Option D might be more precise, or option C might include what A says plus something extra. Always read every option.

15. Misreading the question stem. Words like 'except,' 'not,' 'least,' and 'most likely' completely change what the question is asking. Students who skim the stem often answer the opposite of what was asked.

16. Overthinking simple questions. If a question looks straightforward, it probably is. Not every question is a trick. Some students add complexity that is not there and end up choosing a wrong answer because they convinced themselves the obvious one was too easy.

17. Leaving questions blank. Unless there is negative marking (and most CBT exams in Nigeria do not use it), never leave a question unanswered. A guess gives you a chance. A blank gives you zero.

18. Not eliminating wrong options first. Even when you are unsure, you can usually rule out one or two obviously wrong answers. That takes your odds from 25% to 33% or even 50%. Elimination is one of the most underused strategies in CBT exams.

Technical and Psychological Mistakes

19. Panicking when the system lags. CBT systems sometimes freeze, load slowly, or glitch. When this happens, students panic and start clicking everywhere. Stay calm. Wait a few seconds. If the issue persists, raise your hand and alert an invigilator. Do not start mashing keys.

20. Accidentally submitting the exam early. This happens more often than people think. A misclick on the submit button, and the exam is over. Always be careful around the submit area, and use the confirmation dialog if the platform offers one.

21. Comparing yourself to others during the exam. You notice the person next to you is already on question 40 while you are on question 15. That comparison does nothing useful. Everyone works at different speeds, and speed does not equal accuracy.

22. Letting one bad question ruin your momentum. You hit a question you have absolutely no idea about, and it shakes your confidence for the next five questions. Recognize it for what it is: one question. Let it go and reset.

23. Not managing exam anxiety. Some level of nervousness is normal and even helpful. But full-blown anxiety, where your hands are shaking and you cannot focus, needs to be managed. Deep breathing, brief pauses, positive self-talk. These are not soft skills; they are exam skills.

24. Treating CBT differently from what you studied. Some students prepare well but freeze in front of a screen because the format feels alien. CBT is not a different exam; it is the same exam on a different medium. If you practiced on a computer, you already know this. If you did not, that is mistake number two on this list.

What You Can Do About It

Most of these mistakes are not about intelligence or knowledge. They are about habits, preparation, and self-awareness. The good news is that they are all fixable.

Start by taking realistic CBT mock exams, full-length, timed, on a computer. Pay attention to your patterns. Do you run out of time? Do you change answers? Do you skip the instructions? Once you know your weak spots, you can work on them before they cost you marks on the real thing.

Platforms like Nexovea are built to help with exactly this. Beyond just giving you questions, they track your performance, show you where you lose marks, and help you build the habits that separate students who are prepared from students who just studied.