CBT Exam Tips: How to Score Higher on a Computer-Based Test
Practical CBT exam tips for Nigerian students: how to manage time, navigate the screen, handle freezes and light outages, and practise before JAMB or WAEC.
ExamPadi Editorial · Updated · 7 min read
A computer-based test (CBT) does not ask harder questions than a paper exam. It asks the same questions in a different setting, and that setting catches many students out. They know the work, but the screen, the timer and the mouse eat into their marks. This guide covers the habits that protect your score, with Nigerian realities in mind: shared phones, light outages and busy test centres.
Why CBT feels different
On paper you can see the whole question booklet, flip back quickly and scribble beside a question. On a screen you see one question at a time, you scroll, and your working happens on rough paper beside the keyboard. Three things change:
- Pace. You cannot judge your progress by how thick the paper is. You need a deliberate time plan.
- Reading. People read more slowly and miss details on screens, especially in long passages or questions with several options that look alike.
- Nerves. Strange machines, a queue of other candidates and the knowledge that a power or network fault can happen all add pressure.
The good news is that every one of these improves with practice. Students who have sat several timed screen-based mocks feel noticeably calmer on the day.
Before the exam: prepare the machine, not just the mind
1. Practise on a screen, in timed blocks
Reading notes on your phone is not the same as sitting a timed test. At least once a week in your last month, run a full timed session without pausing. ExamPadi's timed CBT mode is built for this, and you can also use a school or café computer once or twice so that a real keyboard and mouse are familiar.
2. Plan for light outages and data
Do not leave practice for the hours when NEPA is generous. Build the habit of practising in whatever conditions you will have:
- Download your practice sets while you have data or Wi-Fi, so you can work offline later.
- Charge your phone and power bank on the days you plan to practise, not in the middle of a session.
- Keep a few sessions for evening hours with a rechargeable lamp, because many centres run late slots.
If you share a phone with a parent or sibling, agree a fixed hour in advance. A booked 45-minute block beats "when I can get the phone".
3. Learn the controls you will rely on
Know how to select an option with the mouse, how to move to the next and previous question, how to mark a question for review (if the software has that option) and where the timer sits. Never assume; practise with software that looks similar, and read the on-screen instructions in the first minute of the real exam.
During the exam: a simple time plan
Time is the most common thing that goes wrong. Use a plan and write it on your rough paper as soon as you sit down.
| Step | What to do | Why |
|---|---|---|
| 1 | Divide the total time by the number of questions to get minutes per question | Gives you a benchmark |
| 2 | Write checkpoints, for example "quarter of questions done by quarter of time" | Catches slow starts early |
| 3 | First pass: answer what you know quickly, skip what stalls you | Banks the easy marks |
| 4 | Second pass: return to skipped questions | Uses leftover time well |
| 5 | Last 5 to 10 minutes: check for unanswered items | Blank answers score nothing |
As a worked example with made-up numbers: if a paper had 50 questions and 60 minutes, you have about 70 seconds per question. If you are only on question 10 after 20 minutes, speed up and skip harder items rather than sinking time into one.
Do not fight one question
If a calculation is not coming after about a minute and a half, mark it, guess if that is allowed, and move on. A question you leave unanswered gets nothing, but a question that eats five minutes costs you several easier ones.
Read slowly enough, answer quickly enough
Read the last line of the question first (what is being asked), then the full stem. Watch for words like "NOT", "EXCEPT" and "least". On screens these slip past the eye.
Use rough paper properly
Do your working on paper, and write the question number beside it. If you come back to a skipped question, your earlier working will still be there. Check the rules at your centre for what you may bring in; follow the invigilator, not rumours.
When things go wrong
| Problem | What to do |
|---|---|
| The screen freezes | Raise your hand immediately. Do not restart the computer yourself. |
| Power goes off | Stay seated, stay calm, and follow the centre's instructions. Many centres have generators or backup power. |
| You clicked the wrong option | If the software lets you change it, do so quickly and move on. |
| The timer worries you | Check it only at your planned checkpoints, not after every question. |
| A neighbour's screen distracts you | Keep your eyes on your own screen. Looking around wastes time and can be taken as malpractice. |
Be respectful and clear with the staff; they handle these issues often. Note the time when a fault happens so that your complaint can be understood later.
Practice routine for the last four weeks
- Week 1: Do untimed sets by topic, on any device, to find weak areas.
- Week 2: Switch to timed sets of about 20 questions. Review every mistake.
- Week 3: One full timed mock on a laptop or computer if you can access one. Two more on your phone.
- Week 4: Two full mocks, each at the time of day your exam is likely to be. Rest properly the day before.
Reviewing mistakes matters more than the score itself. Write one line for each wrong answer: what the question tested, why you missed it, and what you will do differently. For a deeper routine, read how to use past questions properly.
A short exam-morning checklist
- Charge your phone and keep your slip or documents ready the night before.
- Leave early for your centre; traffic and security checks take longer than you plan.
- Eat something light and drink water.
- Use the first minute to read the screen instructions fully.
Our exam day checklist has the full list.
Final word
CBT is a skill you can train. The students who do best are not always the ones who studied the longest; they are the ones who rehearsed the process: the screen, the clock, the order of questions and the calm response to small problems. You can practise JAMB-style CBT on ExamPadi for free, on Android, iOS, web or Windows, with 46,182 questions across JAMB, WAEC, NECO and NABTEB to draw from. No tool can promise a score, but a few timed sessions will remove the surprises.
Practise with real past questions and worked answers
Take a timed CBT practice test freeFrequently asked questions
How many days should I practise on a computer before a CBT exam?
There is no magic number, but aim for at least three or four full timed sessions on a screen in the last few weeks, not only reading from paper. What matters is that the mouse, the layout and the timer feel normal by exam day.
Can I go back to a question I skipped in a CBT exam?
In most computer-based papers you can move between questions and return to ones you skipped, but the exact controls depend on the exam body and the software. Check the instructions on screen and practise with a similar layout beforehand.
What should I do if the computer freezes during the exam?
Stay calm, raise your hand and tell the invigilator or technical staff straight away. Do not restart the machine yourself or press random keys. Note the time so that your complaint is clear.
Is practising on my phone good enough for a CBT exam?
A phone is fine for daily practice, but you should also do some sessions on a laptop or at a CBT centre so that a larger screen and a mouse do not surprise you.