1
Which part of the computer carries out instructions and is often called its brain?
Correct answer: B. CPU
The Central Processing Unit fetches, decodes and executes instructions.
easy
Computer Fundamentals, MS Office and Internet MCQs
Solved computer awareness MCQs for banking and SSC exams: hardware, memory, number systems, MS Word and Excel, internet terms and cyber safety.
20 MCQsUpdated 27 October 2026
Start your computer awareness revision here. These MCQs cover the parts of a computer and how data moves between them, input and output devices, cells and ranges in MS Excel, IP addresses and the everyday keyboard shortcuts that SSC, IBPS and railway papers ask about.
Questions at this level are quick marks in clerk and assistant exams. Work through the set until you can answer each one without looking at the options, then move on to the more detailed computer topics.
- 2
Which memory loses its contents when the power is switched off?
Correct answer: A. RAM
RAM is volatile; ROM, hard disks and flash drives keep data without power.
easy - 3
How many bits make one byte?
Correct answer: B. 8
A byte is 8 bits; 4 bits is called a nibble.
easy - 4
The binary number 1010 equals which decimal number?
Correct answer: B. 10
1010 = 1×8 + 0×4 + 1×2 + 0×1 = 10.
medium - 5
Which of these is an output device?
Correct answer: D. Printer
A printer produces output on paper. Keyboards, scanners and mice send input to the computer.
easy - 6
Which of the following is system software?
Correct answer: A. Windows
An operating system such as Windows manages the hardware; the others are application software.
easy - 7
In MS Word, the shortcut Ctrl + Z is used to:
Correct answer: B. undo the last action
Ctrl + Z undoes and Ctrl + Y redoes.
easy - 8
In MS Excel, which function adds the values in a range of cells?
Correct answer: B. =SUM()
=SUM(A1:A10) adds the values. COUNT only counts how many cells contain numbers.
easy - 9
In MS Excel, the intersection of a row and a column is called a:
Correct answer: B. cell
Each cell has an address such as C4 (column C, row 4).
easy - 10
Which file extension is used by MS PowerPoint 2007 and later?
Correct answer: C. .pptx
.pptx is PowerPoint, .docx Word and .xlsx Excel.
easy - 11
The full form of HTML is:
Correct answer: C. Hyper Text Markup Language
HTML is the language used to structure web pages.
easy - 12
Which protocol is used to send email?
Correct answer: B. SMTP
SMTP (Simple Mail Transfer Protocol) sends mail; POP3 and IMAP are used to receive it.
medium - 13
A unique numeric address given to each device on a network is its:
Correct answer: A. IP address
An IP address identifies a device on a network; DNS translates domain names into IP addresses.
easy - 14
Which of these is a web browser?
Correct answer: D. Google Chrome
Chrome, Firefox and Edge are browsers used to open web pages.
easy - 15
A fraudulent message pretending to be from a bank to steal your OTP or password is an example of:
Correct answer: D. phishing
Banks never ask for your OTP, PIN or password. Report such messages and don't click their links.
easy - 16
Malware that locks or encrypts your files and demands payment is called:
Correct answer: A. ransomware
Regular backups are the best defence against ransomware.
easy - 17
Which key combination opens Task Manager directly in Windows?
Correct answer: C. Ctrl + Shift + Esc
Ctrl + Shift + Esc opens Task Manager. Windows + R opens the Run box.
medium - 18
Which device forwards data packets between networks, for example between a home network and the internet?
Correct answer: D. Router
A router directs data between networks; home Wi-Fi routers connect your devices to the internet.
easy - 19
1 kilobyte (KB) is equal to:
Correct answer: A. 1,024 bytes
In computing, 1 KB = 2¹⁰ = 1,024 bytes.
easy - 20
Which of these stores data permanently and is usually the largest storage in a PC?
Correct answer: C. Hard disk or SSD
Hard disks and SSDs are secondary storage: large and non-volatile, but slower than RAM.
easy