Computer MCQs (page 3 of 48)
Computer basics, hardware, software, networking, the internet, file formats, shortcuts and the people behind modern computing.
954 questions. Select an option to check your answer, or open "Show answer". Showing 41–60.
- 41.
What is the binary equivalent of decimal 5?
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Answer: B. 101
5 in decimal is 101 in binary.
- 42.
What is the binary equivalent of decimal 8?
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Answer: A. 1000
8 in decimal is 1000 in binary.
- 43.
What is the hexadecimal equivalent of decimal 10?
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Answer: B. A
10 in decimal is A in hexadecimal.
- 44.
What is the hexadecimal equivalent of decimal 15?
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Answer: D. F
15 in decimal is F in hexadecimal.
- 45.
Which of the following is an operating system?
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Answer: A. Windows
Windows is an operating system.
- 46.
Which of the following is a programming language?
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Answer: D. Python
Python is a programming language.
- 47.
Which of the following is a web browser?
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Answer: A. Chrome
Chrome is a web browser.
- 48.
Which of the following is a database?
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Answer: D. MySQL
MySQL is a database management system.
- 49.
Which of the following is a spreadsheet software?
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Answer: D. Excel
Excel is spreadsheet software.
- 50.
Which of the following is a word processor?
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Answer: B. Word
Word is a word processor.
- 51.
Which keyboard shortcut is used to copy selected text in Windows?
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Answer: B. Ctrl + C
Ctrl + V pastes, Ctrl + X cuts and Ctrl + Z undoes.
- 52.
Which keyboard shortcut is used to undo the last action?
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Answer: C. Ctrl + Z
Ctrl + Y usually redoes, and Ctrl + A selects all.
- 53.
Which part of the CPU performs arithmetic and logical operations?
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Answer: D. ALU
ALU stands for Arithmetic Logic Unit.
- 54.
Which program translates a whole high-level program into machine code before it runs?
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Answer: C. Compiler
An interpreter translates and runs code line by line. An assembler translates assembly language.
- 55.
How many bits long is an IPv4 address?
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Answer: B. 32
IPv4 addresses are 32 bits, usually written as four numbers such as 192.168.1.1. IPv6 addresses are 128 bits.
- 56.
In a spreadsheet, the intersection of a row and a column is called a:
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Answer: D. Cell
Each cell has an address such as B3.
- 57.
A fraudulent email that tries to trick you into revealing passwords is called:
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Answer: B. Phishing
Phishing messages imitate trusted organisations to steal login or payment details.
- 58.
A system that monitors and filters network traffic to block unauthorised access is a:
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Answer: D. Firewall
Firewalls can be hardware, software or both.
- 59.
Which of these operating systems is open source?
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Answer: B. Linux
The Linux kernel's source code is freely available under the GNU GPL.
- 60.
Which was the first general-purpose electronic digital computer?
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Answer: B. ENIAC
ENIAC was completed in 1945 at the University of Pennsylvania.