How to Pass JAMB Computer Studies in 2027

Computer Studies is the one subject you can practise on the very thing it describes. If you can touch a computer, open a spreadsheet, rename a file and test a formula, half the syllabus moves from memory into habit. If you cannot, you will need to work harder on diagrams and definitions. Either way, the topics are quite structured, and a plan works well.

This guide is for the 2027 cycle. Before you register the subject, confirm in the official JAMB brochure at jamb.gov.ng that Computer Studies is offered for your course. Our subject combination guide for Computer Science can help you compare combinations.

What the subject covers

ExamPadi organises Computer Studies practice around ten topics: Computer Hardware, Software, Number Bases, Word Processing, Spreadsheets, the Internet and the World Wide Web, Computer Networking, Information Security, Programming Concepts and Database Basics. A useful grouping:

Number bases: your safest calculation marks

This is the one numeric topic and it is rule-based. Learn three conversions.

Binary to decimal. Write the place values 8, 4, 2, 1 under the digits and add where there is a 1. For example, 1011 in binary is 8 + 0 + 2 + 1 = 11.

Decimal to binary. Divide by 2 repeatedly and read the remainders from the bottom. For 13: 13 ÷ 2 = 6 remainder 1; 6 ÷ 2 = 3 remainder 0; 3 ÷ 2 = 1 remainder 1; 1 ÷ 2 = 0 remainder 1. Reading upwards, the answer is 1101.

Binary addition. Add column by column: 0+0 = 0, 0+1 = 1, 1+1 = 10 (write 0, carry 1). For example, 110 + 011: the right column gives 1; the middle gives 1 + 1 = 10, so write 0 and carry 1; the left gives 1 + 0 + the carry 1 = 10, so write 0 and carry 1 again, giving 1001 (which is 6 + 3 = 9).

Also learn octal (base 8) and hexadecimal (base 16), and how hexadecimal uses letters A to F for 10 to 15. Remember that a byte is 8 bits and be able to move between the common units (kilobyte, megabyte, gigabyte). Practise 10 conversions a day for a week, and they become automatic.

Hardware and software: classify and compare

Make a table of the main parts of a computer system and what each does.

For software, distinguish system software (operating systems, utilities) from application software (word processors, spreadsheets). Learn examples of each and the function of an operating system: managing files, memory, processes and devices.

Compare things in pairs, as examiners do: RAM versus ROM, input versus output, hardware versus software, volatile versus non-volatile memory, compiler versus interpreter.

Office skills: remember the features

For word processing, learn the standard features: formatting, headers and footers, tables, mail merge, spell check, page layout. For spreadsheets, learn cells, rows, columns, and formulas. An original sample:

In a spreadsheet, cell A1 holds 5, cell A2 holds 7 and cell A3 holds 8. The formula =SUM(A1:A3) in A4 gives: 5 + 7 + 8 = 20.

Know also the common functions (SUM, AVERAGE, MAX, MIN, COUNT), the difference between a relative and an absolute cell reference, and the idea of a chart. For databases, learn the terms table, record, field, primary key and query, and the advantages of a database over a paper file.

Internet, networking and security

Learn the difference between the Internet and the World Wide Web, and the role of a browser, a search engine, a web server and a URL. Know the common network types (LAN, MAN, WAN), topologies (bus, star, ring) and one advantage and disadvantage of each. Learn the parts of a network: router, switch, modem, network interface card.

Information security covers threats (viruses, worms, phishing, hacking) and protections (strong passwords, antivirus software, firewalls, backups, updates). A question may give a scenario and ask which protection is best. Match the threat to the safeguard: phishing is best handled by caution about links and unexpected messages, not by a printer driver.

Programming concepts

Questions focus on ideas: what an algorithm is (a step-by-step method to solve a problem), what a flowchart shows, the main structures (sequence, selection, iteration), and the characteristics of low-level and high-level languages. Practise putting a simple process in order, such as "read two numbers, add them, display the result". Learn the standard flowchart symbols: oval for start and end, rectangle for process, diamond for decision, parallelogram for input and output.

Study habits for an on-screen objective test

JAMB Computer Studies is answered by choosing from options on a screen, and wrong options are often written to look right: a definition that belongs to the neighbouring term, or a unit one step too large. So read all four options before you commit, and eliminate the ones you can prove wrong. That is why contrast pairs matter more than long notes.

1. Do something on a computer every day, even for 15 minutes.
2. Keep an acronym list in groups: CPU, RAM, ROM, URL, HTML, LAN, ISP, and so on.
3. Draw the flowchart symbols and network layouts.
4. Review in pairs and contrasts.

Mistakes to avoid

1. Mixing up RAM and ROM.
2. Reading binary digits left to right without place values.
3. Confusing the Internet with the web.
4. Writing a spreadsheet formula without the equals sign.
5. Assuming a recent term is outside the syllabus without checking the official list.

A study plan

For numeric speed, read how to solve maths faster. For a priority list, see JAMB Computer Studies topics to focus on.

Practise on screen

ExamPadi has free Computer Studies practice with explanations and a timed CBT mode. Start with the 2025 Computer Studies past questions. Nobody can promise a score, but a daily mix of hands-on practice and short question sets goes a long way. Tonight, convert five decimal numbers to binary and check them.