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How to Use the Computer in the JAMB CBT: A Beginner’s Guide

Never used a computer for an exam? You don’t need to be an expert. Here is exactly what happens on the JAMB CBT screen — the mouse, the keyboard shortcuts, the calculator, the timer — and how to make it all feel familiar before exam day.

By Belmadeng Editorial · Published 21 Sept 2026 · Updated 9 October 2026 · Session 2026/2027

In short

The JAMB CBT is simple: log in with your registration number, click Start, then click the A–D option (or press the matching key) to answer. You have 180 questions in about 2 hours across four subjects, a countdown timer at the top, buttons to move Next/Previous, an on-screen calculator, and a Submit button. The one thing that removes all the fear is doing a real run first — try free JAMB CBT practice.

On this page

What “CBT” actually means

CBT stands for Computer-Based Test. Instead of shading an answer sheet with a pencil, you read each question on a screen and choose your answer with a mouse (or a key). That is the whole idea. You are not writing anything, typing essays, or operating the computer beyond selecting options and moving between questions.

The only skills you really need

You do not need to be good with computers. In the JAMB CBT you only ever do three things: read, click (or press a key) to choose A, B, C or D, and move to the next question. If you can use a phone, you can do this. Everything below simply shows you where each button is.

Before you start: check-in and biometrics

When you arrive at the CBT centre, officials verify your identity — usually with a fingerprint (biometric) check against your registration details — before you are assigned a system. Arrive early, bring the documents JAMB requires, and leave phones and other prohibited items out of the hall. Once you are seated, wait for the go-ahead before touching anything.

Logging in and starting

Your screen begins at a login page. You (or the invigilator) enter your JAMB registration number to bring up your details and your four registered subjects. The exam — and the countdown timer — only begins when you click “Start”, so take a breath, read the on-screen instructions, and start when you are ready.

The exam screen at a glance

A typical JAMB CBT screen shows, in one view:

  • the question and its four options, each with a small circle (radio button) beside A, B, C and D;
  • the countdown timer at the top;
  • a subject tab to switch between your four subjects;
  • Next and Previous buttons (and a way to jump to a question number);
  • a Calculator button; and
  • a Submit button.

Spend the first few seconds locating these — once you know where everything is, the rest is just reading and clicking.

Selecting and changing an answer

To answer, move the pointer to the circle beside your chosen option and left-click once. The selected option is highlighted or marked. Changed your mind? Just click a different option — your new choice replaces the old one. You can revisit and change any answer as many times as you like before you submit.

Keyboard shortcuts (CBT without a mouse)

Many centres let you answer using the keyboard instead of (or as well as) the mouse — sometimes with a small dedicated keypad. The common shortcuts are worth knowing in case your system uses them:

KeyWhat it does
A, B, C, DSelect that option as your answer
NGo to the next question
PGo to the previous question
SSubmit the exam (use only when finished)
RReverse/cancel a submission if you pressed S by mistake

You do not have to use the keyboard — the mouse works fine — but knowing these keys means you are never stuck, and some candidates find them faster.

Using a laptop touchpad

If your centre uses laptops rather than desktops, you may have a touchpad instead of a mouse. It works the same way: slide your finger to move the pointer, and tap (or press the left button) to select. If you have only practised with a mouse, spend a few minutes getting used to a touchpad too, just in case.

Moving around: next, previous and review

Use Next (or the N key) to go forward and Previous (or P) to go back. You are free to move around: answer the easy questions first, then return to the harder ones. If a passage is long, use the mouse scroll wheel (or the arrow keys) to scroll. Before you submit, quickly review to make sure no question is left unanswered — there is no penalty for guessing, so never leave a blank.

Switching between your four subjects

Your four subjects sit behind a subject tab, and you can move between them in any order — you do not have to start with Use of English. A good tactic is to start with your strongest subject to build momentum and bank marks quickly, then move on. Keep an eye on the clock so every subject gets its share of time.

Using the on-screen calculator

You cannot bring your own calculator into the hall, but JAMB provides an on-screen calculator for the subjects that need one. Open it with the Calculator button on the screen (at some centres it is the computer’s own calculator app on the taskbar at the bottom). It handles the basic arithmetic you need — add, subtract, multiply, divide, percentages and so on. Practising with a simple on-screen calculator beforehand means you will not waste time hunting for keys during the exam.

The timer: managing your 2 hours

The countdown timer at the top of the screen shows how much time is left. JAMB currently gives about two hours for 180 questions across the four subjects — roughly 40 seconds per question. Check the timer regularly, do not spend too long on any single question, and aim to leave a few minutes at the end to review. When time runs out, the system submits automatically, so pace yourself to finish comfortably.

Submitting your exam

When you are done, click Submit (or press S) and confirm. If you press S by accident, the R key (or a cancel option) reverses it — so only confirm when you are truly finished. After submitting, wait for the invigilator to confirm your paper is submitted before you leave your seat. Your score is typically shown/available very quickly afterwards.

If something goes wrong

If your system freezes, restarts, or behaves oddly, do not panic and do not try to fix it yourself — raise your hand and alert the invigilator immediately. CBT centres have backup systems and procedures, and your time and answers are handled on the server. Reporting a problem at once is always the right move.

Common CBT mistakes to avoid

  • Leaving questions blank. There is no penalty for a wrong guess — attempt every question.
  • Ignoring the timer until it is too late, then rushing the last subject.
  • Spending five minutes on one hard question instead of flagging it and moving on.
  • Submitting too early by accident — remember R cancels an accidental submit.
  • Never having seen a CBT screen before, so you lose the first minutes learning the layout live.

The #1 tip: practise on a real CBT first

Everything above becomes second nature after just one real run-through. The single best thing you can do is practise on an actual CBT interface before exam day, so the screen, the timer and the navigation are already familiar. On Belmadeng you can:

  • do free timed JAMB CBT practice by topic or subject, and
  • sit a full mock exam across four subjects, exactly like the real thing.

Then sharpen your wider strategy with our guides on how to pass JAMB CBT and the full JAMB CBT practice guide.

Quick keypad reference

JAMB replaces the mouse with a small keypad. Here is the whole system on one screen — learn these five things and you can drive the exam without thinking:

KeyWhat it does
A, B, C, DSelect your answer for the current question
N (Next)Go to the next question
P (Previous)Go back to the previous question
R (Reverse)Deselect the current answer so you can change it
Subject tabSwitch between your four subjects at any time

The Submit control is used only at the very end — never rush toward it. If your centre uses a touchpad or mouse instead, the same actions are available on screen.

Never used a computer? You'll still be fine

If you have rarely touched a computer, take heart: the JAMB CBT is deliberately simple. You are not typing essays or using software — you are reading a question and pressing one of five clearly labelled keys. There is nothing to install, no files to manage, and no typing beyond selecting a letter. Candidates from every background, including those sitting at a computer for the first time, pass every year. The one thing that removes all the nervousness is having seen the screen before, so do a few practice sessions on a device beforehand — after two or three runs the mechanics disappear and you simply answer questions.

Practise on the exact interface, free

Reading about the interface helps, but nothing beats using it. Our free CBT practice and full mock exams reproduce the on-screen timer, the question navigation and subject switching — no sign-up, no app, on any device. Do a few timed runs so the timer, the keys and the flow all feel familiar; then on exam day the computer is a non-issue and your full attention is on the questions. For the strategy that goes with the mechanics, see JAMB CBT time management and how to pass JAMB CBT.

What the CBT hall is actually like

A lot of first-timer nerves come from not knowing what the room looks like. Picture it and it stops being scary. A JAMB CBT centre is a hall or computer lab filled with rows of desktop computers, each at its own small workstation. You are assigned a specific system — your seat number is tied to it — so you do not choose where to sit.

At your station you will typically find the monitor, a mouse and a keyboard, and your chair. Candidates around you are writing at the same time, and — this surprises many people — the person next to you may be answering completely different questions, because JAMB shuffles question sets. There is no point glancing at a neighbour’s screen; it will not match yours, and looking around can be mistaken for malpractice.

Invigilators move through the hall to help with technical problems and keep order. Phones, bags and written material stay outside or at the front — see the exam-day checklist for exactly what you may and may not bring. The hall can be busy and a little noisy as people settle in; once the exam starts, you focus only on your own screen. That is the whole environment — a room of computers, an assigned seat, invigilators on hand, and your two hours in front of you.

Your first five minutes at the computer

Once you are logged in, a calm, deliberate start sets the tone for the whole paper. Follow this simple sequence rather than rushing straight into question one.

  1. Confirm your details on screen. Check that your name, photo and registration number are correct. If anything is wrong, raise your hand for an invigilator immediately — before you start answering.
  2. Read the on-screen instructions. Note how many questions there are, the time allowed, and how to move between subjects. It takes seconds and prevents panic later.
  3. Find the timer and the navigation buttons. Locate the countdown clock and the Next, Previous and Submit controls so you are never hunting for them mid-exam.
  4. Answer an easy question first. Start with a subject you are confident in. One quick correct answer settles your nerves and confirms that selecting and saving works.
  5. Set your pace. With four subjects in two hours, that is roughly 30 minutes each. Glance at the timer, then begin working steadily — the full pacing plan is in CBT time management.

Spending five calm minutes here is never wasted. It catches detail errors while they can still be fixed and lets you start answering with a clear head instead of a racing one.

Support for candidates with disabilities

JAMB makes provisions for candidates with disabilities or special needs so that a physical or sensory barrier does not stand between you and a fair exam. If this applies to you, the key is to declare it during registration — there is a section to indicate a disability — so the board can arrange the right support at your centre in advance. Support is not something you can usually arrange on exam day itself.

Examples of support JAMB arranges (indicative — confirm current provisions with JAMB)
NeedTypical support
Low visionEnlarged on-screen text / magnification, and a suitable seating arrangement
Blind candidatesAssistive arrangements such as a reader or recorder, and additional time where approved
Hearing impairmentWritten instructions and a sign-language interpreter where needed
Physical/mobility needsAccessible seating and assistance moving to and using the workstation
Other conditionsCase-by-case accommodations, which may include extra time

Exact provisions and the way to apply for them are set by JAMB and can change from year to year, so always confirm the current process and deadlines on the official JAMB portal (and keep any medical documentation JAMB asks for). Declaring your needs early, and following up to confirm they are in place at your centre, is the surest way to sit the exam on equal terms.

Staying comfortable at the screen for two hours

Two hours at a computer is tiring if you are not used to it, and discomfort quietly costs you concentration. A few small habits keep you sharp to the last question.

  • Sit back, not hunched. Keep your back against the chair and the screen roughly an arm’s length away. Leaning in for two hours strains your neck and eyes.
  • Blink and look away briefly. Staring at a screen dries your eyes. Every so often, blink deliberately and glance at a far point in the room for a second or two between questions — it resets tired eyes without costing real time.
  • Ask about a screen problem. If your monitor is too bright, too dim, flickering, or the text is hard to read, raise your hand. An invigilator can help or move you — a bad screen is a technical issue, not something you must endure.
  • Relax your hand. You only click or press keys, so there is no need to grip the mouse tightly. A loose hand does not cramp.
  • Breathe and reset. If you feel flustered, take one slow breath and read the question again. Calm reading beats frantic clicking every time.

None of this requires computer experience — it is simply about being comfortable enough to think clearly. Combined with real CBT practice beforehand, it means the machine never becomes the thing standing between you and your score.

Frequently asked questions

Do I need to be good with computers to write JAMB CBT?
No. You only read questions and click (or press a key) to choose A, B, C or D, then move to the next question. If you can use a phone, you can handle the JAMB CBT. A little practice removes any nervousness.
Can I use the keyboard instead of the mouse in JAMB CBT?
Often, yes. Many centres support keyboard shortcuts: A, B, C, D to select an option, N for next, P for previous, S to submit, and R to cancel an accidental submission. The mouse also works, so use whichever you prefer.
Is there a calculator in the JAMB CBT?
Yes. You cannot bring your own, but JAMB provides an on-screen calculator you open with the Calculator button (or the computer's calculator app on the taskbar at some centres). It does the basic arithmetic you need.
How many questions is the JAMB CBT and how long does it last?
About 180 questions across four subjects in roughly two hours — approximately 40 seconds per question. A countdown timer is shown on screen, and the exam submits automatically when time runs out.
Can I change my answer after selecting it?
Yes. Just click a different option (or press the other letter) and your new choice replaces the old one. You can change answers as often as you like before you submit.
Can I start with any subject?
Yes. Use the subject tab to move between your four subjects in any order — you do not have to begin with Use of English. Many candidates start with their strongest subject.
Can I go back to a previous question?
Yes. Use the Previous button or the P key to return to earlier questions, and review your answers before submitting. Make sure no question is left unanswered.
What happens if the computer freezes or restarts during the exam?
Stay calm and alert the invigilator immediately — do not try to fix it yourself. CBT centres have backup systems and your session is handled on the server. Report any issue at once.
Will I use a mouse or a touchpad?
It depends on the centre. Desktops use a mouse; laptops use a touchpad, where you slide your finger to move the pointer and tap to select. Practise with both if you can.
Do I have to type anything in the JAMB CBT?
Beyond entering your registration number to log in, no typing is required — all answers are chosen by clicking an option or pressing its letter key.
How can I practise the JAMB CBT before the exam?
Use a real CBT interface online. On Belmadeng you can do free timed practice by topic or subject and sit a full mock exam that mirrors the real screen, timer and navigation — the best way to build confidence.
Is JAMB CBT hard for first-timers?
Not once you have seen the screen. The difficulty is unfamiliarity, which disappears after a single practice run. Do one mock and the real exam will feel routine.
Do I need computer skills to write JAMB CBT?
No. The CBT is deliberately simple — you read a question and press one of five labelled keys (A–D to answer, Next/Previous to move). There's no typing or software to use. A few practice sessions beforehand remove any nervousness, even if you've never used a computer.
Can I change my answer during the JAMB CBT?
Yes. Press R (Reverse) to deselect your current answer, then choose the correct option. You can also use Previous and the subject tabs to return to any question and change it before you submit.
Is there a mouse in the JAMB CBT?
JAMB primarily uses a keypad rather than a mouse — A–D to answer, Next/Previous to move, R to deselect, and a subject tab to switch subjects. Some centres provide a touchpad or mouse; either way the on-screen actions are the same.
How can I practise the JAMB CBT interface before the exam?
Use a practice platform that mirrors the real screen. Belmadeng's free CBT practice and mocks reproduce the timer and navigation with no sign-up or app, so the interface feels automatic on exam day.
What does the JAMB CBT exam hall look like?
It is a hall or computer lab with rows of desktop computers, each at its own workstation with a monitor, mouse and keyboard. You are assigned a specific system by your seat number, invigilators move through the hall to help, and phones and bags stay outside. Candidates near you may be answering different questions, since JAMB shuffles question sets.
Does JAMB provide support for candidates with disabilities?
Yes. JAMB makes provisions for candidates with disabilities or special needs, such as enlarged text for low vision, assistance for blind candidates, interpreters for hearing impairment, accessible seating, and extra time where approved. You must declare your disability during registration so support can be arranged in advance. Confirm the current process on the official JAMB portal.
Can I ask for help if my screen is not working properly?
Yes. If your monitor is too bright, too dim, flickering, frozen or hard to read, raise your hand and an invigilator will help or move you to another system. A faulty screen is a technical issue the centre is there to fix — do not struggle through it in silence.
What should I do in the first few minutes of the CBT?
Confirm your name, photo and registration number on screen; read the on-screen instructions; locate the timer and the Next, Previous and Submit buttons; then answer an easy question first to settle your nerves and confirm selecting works. Spending five calm minutes this way prevents panic and catches any detail error while it can still be fixed.
Will people around me be answering the same questions?
Not necessarily. JAMB shuffles question sets, so the candidate beside you may be answering different questions in a different order. There is no benefit to looking at a neighbour’s screen — it will not match yours, and looking around can be mistaken for malpractice. Focus only on your own screen.

Related

Free JAMB CBT practice · Take a mock exam · How to pass JAMB CBT · JAMB CBT practice guide · How to study for JAMB · 3-month preparation plan · JAMB CBT time management · Exam-day checklist

Reviewed: 22 Sept 2026 · Author: Belmadeng Editorial. Belmadeng is independent and not affiliated with JAMB — confirm official processes at jamb.gov.ng.