9th class computer science MCQs with answers — 20 for Matric.

Who it's for: Class 9 (Matric) computer science students in Pakistan, ages 14–15, and their teachers.

These are original practice questions on topics from the Class 9 computer science syllabus. They are not official board questions or past papers, so check your own board's book for exact wording.

Use them for chapter revision, a weekly class test, or self-practice before the board exam. Every question has one correct answer except question 20, which has two. All twenty fit in one Quizoma quiz.

The 20 class 9 computer science MCQs with answers

Correct answers are marked with a tick. The same questions, with the same answers, are in the CSV file, in the same order.

Problem solving

1. What is a step-by-step set of instructions to solve a problem called?
   A. A compiler · B. A network · C. An algorithm ✓ · D. A database
2. Which flowchart symbol is used for a decision?
   A. Parallelogram · B. Rectangle · C. Diamond ✓ · D. Oval
3. What does the oval symbol show in a flowchart?
   A. A decision · B. A process · C. Start or end ✓ · D. Input or output
4. What does the parallelogram symbol show in a flowchart?
   A. Input or output ✓ · B. A decision · C. A process · D. Start or end
5. What is finding and fixing errors in a program called?
   A. Debugging ✓ · B. Encoding · C. Compiling · D. Formatting

Binary system

6. What is the decimal number 5 in binary?
   A. 100 · B. 101 ✓ · C. 111 · D. 110
7. What is the binary number 1010 in decimal?
   A. 10 ✓ · B. 8 · C. 12 · D. 1010
8. How many bits make one byte?
   A. 8 ✓ · B. 16 · C. 1024 · D. 4
9. Which number system has base 16?
   A. Binary · B. Hexadecimal ✓ · C. Decimal · D. Octal
10. What is the output of an AND gate when its inputs are 1 and 0?
    A. 2 · B. 0 ✓ · C. 10 · D. 1

Networks

11. What is a network inside a single building called?
    A. The internet · B. MAN · C. LAN ✓ · D. WAN
12. Which device connects different networks and forwards data between them?
    A. A router ✓ · B. A keyboard · C. A monitor · D. A scanner
13. What is the unique number given to a device on a network?
    A. A URL · B. An IP address ✓ · C. An email address · D. A PIN
14. In which topology are all devices connected to a central hub or switch?
    A. Mesh · B. Star ✓ · C. Ring · D. Bus
15. What is the largest wide area network in the world?
    A. Bluetooth · B. The internet ✓ · C. A LAN · D. An intranet

Data & privacy

16. What is turning data into a secret code called?
    A. Compression · B. Encryption ✓ · C. Formatting · D. Decryption
17. What is copying someone else's work without giving them credit called?
    A. Encryption · B. Plagiarism ✓ · C. Spamming · D. Hacking
18. What is unwanted bulk email called?
    A. A cookie · B. A firewall · C. A cache · D. Spam ✓
19. Which malware locks your files and demands payment?
    A. Ransomware ✓ · B. Spyware · C. Adware · D. Firmware
20. Which of these are good digital citizenship habits? (more than one answer)
    A. Sharing your password with friends · B. Checking facts before sharing ✓ · C. Being respectful to others online ✓ · D. Posting other people's photos without asking

Some wrong options are the usual exam mistakes. Rectangle in question 2 is the process box, while a decision is a diamond; 1010 in question 7 repeats the binary digits instead of converting them; and WAN in question 11 covers a much wider area. Quizoma's results show the accuracy of every question, so a teacher sees straight away which chapter needs another lesson.

Students can use the same set to revise on their own: import it, switch on Show Score and Retake, and it becomes a practice test they can take until every answer sticks.

How to use this template

1. Download the file: quizoma-template-class-9-computer-science-mcqs.csv.
2. Open Quizoma Studio in your browser (or the Android app) and choose Import from file.
3. Pick the .csv. Quizoma shows every question for review before anything is saved, so you can fix a wording, drop a question or add your own.
4. Save, then share the 6-character quiz code or QR with your class. Participants answer at quizoma.com/take in any browser.

Timing and points are set on the quiz when you import, not in the file. If you would rather not import at all, you can type the questions into the online quiz maker directly.

What is in the file

One row per question: the question, then the options, then a final correct column holding the number of the right option. Where more than one option is right, the numbers are joined with a |. The first lines look like this:

question,option1,option2,option3,option4,correct
What is a step-by-step set of instructions to solve a problem called?,A compiler,A network,An algorithm,A database,3
What is the decimal number 5 in binary?,100,101,111,110,2

Open it in any spreadsheet to edit, and save it as CSV again before importing — an .xlsx file is not read. The same format is described on the templates page.