📝 Computer Knowledge MCQs (With Explanation)
🔹 Section 1: Computer Fundamentals
Q1. Who is known as the father of computer?
A. Alan Turing
B. Charles Babbage
C. John Von Neumann
D. Bill Gates
Answer: B
Explanation: Charles Babbage is known as the father of computer because he designed the Analytical Engine, the first mechanical computer.
Q2. What is the smallest unit of data in a computer?
A. Byte
B. Bit
C. KB
D. MB
Answer: B
Explanation: A bit is the smallest unit of data, represented as 0 or 1. All data in computers is stored in binary form.
Q3. Which part of computer performs calculations?
A. RAM
B. ALU
C. Hard Disk
D. Monitor
Answer: B
Explanation: ALU (Arithmetic Logic Unit) performs all arithmetic and logical operations.
Q4. What does CPU stand for?
A. Central Process Unit
B. Central Processing Unit
C. Computer Processing Unit
D. Control Processing Unit
Answer: B
Explanation: CPU is the brain of the computer that controls all operations.
Q5. Which is an input device?
A. Monitor
B. Printer
C. Keyboard
D. Speaker
Answer: C
Explanation: Keyboard is used to input data into the computer.
👉 Exam Tip: Questions on CPU, ALU, and memory are very common.
🔹 Section 2: MS Office
Q6. Which software is used for word processing?
A. Excel
B. Word
C. PowerPoint
D. Access
Answer: B
Explanation: MS Word is used to create, edit, and format documents.
Q7. Shortcut key for copy is?
A. Ctrl + X
B. Ctrl + C
C. Ctrl + V
D. Ctrl + Z
Answer: B
Explanation: Ctrl + C is used to copy selected content.
Q8. VLOOKUP function is used in?
A. Word
B. Excel
C. PowerPoint
D. Paint
Answer: B
Explanation: VLOOKUP is used in Excel to search values vertically in a table.
Q9. File extension of Excel file is?
A. .docx
B. .xlsx
C. .pptx
D. .txt
Answer: B
Explanation: Excel files are saved with .xlsx extension.
Q10. PowerPoint is used for?
A. Database
B. Presentation
C. Programming
D. Networking
Answer: B
Explanation: PowerPoint is used to create presentations with slides.
👉 Quick Tip: Shortcut keys are frequently asked in exams.
🔹 Section 3: Internet & Networking
Q11. What does URL stand for?
A. Uniform Resource Locator
B. Universal Resource Link
C. Unique Resource Locator
D. Unified Resource Link
Answer: A
Explanation: URL is the address used to access a webpage on the internet.
Q12. Which protocol is used to access web pages?
A. FTP
B. HTTP
C. SMTP
D. TCP
Answer: B
Explanation: HTTP is used for transferring web pages between server and browser.
Q13. What is LAN?
A. Large Area Network
B. Local Area Network
C. Logical Area Network
D. Limited Area Network
Answer: B
Explanation: LAN connects computers within a small area like office or home.
Q14. Which device connects networks?
A. Monitor
B. Router
C. Keyboard
D. Mouse
Answer: B
Explanation: Router connects different networks and manages data traffic.
Q15. Which is a web browser?
A. Chrome
B. FTP
C. HTML
D. TCP
Answer: A
Explanation: Chrome is a web browser used to access websites.
👉 Exam Tip: Internet terms like URL, HTTP, DNS are frequently repeated.
🔹 Section 4: Mixed Questions
Q16. What is RAM?
A. Permanent memory
B. Temporary memory
C. External memory
D. Cache
Answer: B
Explanation: RAM is temporary memory used during processing.
Q17. Which is an operating system?
A. Windows
B. Excel
C. Word
D. Chrome
Answer: A
Explanation: Windows is an operating system that manages hardware and software.
Q18. What is antivirus used for?
A. Speed up computer
B. Protect from virus
C. Store data
D. Print files
Answer: B
Explanation: Antivirus protects the system from malware and threats.
Q19. Which memory is permanent?
A. RAM
B. ROM
C. Cache
D. Register
Answer: B
Explanation: ROM stores permanent data and instructions.
Q20. What is full form of DNS?
A. Domain Name System
B. Data Network System
C. Digital Name System
D. Domain Network Service
Answer: A
Explanation: DNS converts domain names into IP addresses.
🔑 Key Points Summary
- CPU = Brain of computer
- Bit = Smallest unit
- MS Word = Document tool
- Excel = Calculations & formulas
- URL = Web address
- LAN = Small network
- Router connects networks
📌 Conclusion
Computer knowledge is one of the easiest scoring sections in competitive exams if prepared properly. Focus on basic concepts, shortcut keys, and internet terminology. Practice MCQs regularly and revise important topics like MS Office and networking. With consistent effort, you can easily score high marks in this section.
OSSSC Computer Knowledge – 100 MCQs (My Real Study Notes)
So, I started preparing Computer Knowledge for OSSSC exams (RI, ARI, Amin, Forest Guard)… and honestly, I thought — “Yeh toh easy hai, daily mobile use karte hain.”
But when I tried MCQs, I got confused between small terms like RAM, ROM, shortcut keys… 😅
Then I realized something important:
Using a computer ≠ understanding computer basics
So I changed my approach. And now this section feels easy and scoring.
I’m sharing how I studied — simple way, like I’d explain to my friend.
1. Computer Fundamentals
This is the base. Many questions come from here.
Basic idea:
Computer has two main parts:
- Hardware → things you can touch
- Software → programs you use
My trick:
- Keyboard, mouse → hardware
- Windows, apps → software
One relatable example:
Computer is like human body:
- Body → hardware
- Brain → software
This helped me remember easily.
2. Input & Output Devices
This is very common in MCQs.
Input devices:
- Keyboard
- Mouse
- Scanner
Output devices:
- Monitor
- Printer
- Speaker
My trick:
Input → “give data”
Output → “show result”
3. Memory (RAM & ROM)
This topic confused me earlier.
Simple understanding:
- RAM → temporary memory
- ROM → permanent memory
My trick:
RAM = Running work
ROM = Read Only (fixed)
Example:
Opening app → RAM
System data → ROM
4. MS Office (Important for Exams)
This part is very important.
MS Word:
- Used for typing
- Formatting text
MS Excel:
- Used for calculations
- Tables and data
MS PowerPoint:
- Used for presentations
My trick:
- Word → writing
- Excel → numbers
- PowerPoint → slides
5. Internet Basics
Easy and scoring.
Important terms:
- WWW → World Wide Web
- Browser → Chrome, Edge
- Email → sending messages
My realization:
We use these daily, but don’t notice them.
6. Shortcut Keys
This is very important for exams.
At first I ignored this, but questions come directly.
Important keys:
- Ctrl + C → Copy
- Ctrl + V → Paste
- Ctrl + X → Cut
- Ctrl + S → Save
My trick:
Practice on keyboard once.
How I Practice MCQs
Earlier I was just reading notes.
But I forgot everything.
Now I do:
- Study topic
- Solve MCQs
- Check answers
- Revise
Now I feel confident.
Sample MCQs
1. CPU stands for?
Answer: Central Processing Unit
2. Which is input device?
Answer: Keyboard
3. RAM is?
Answer: Temporary memory
4. Ctrl + C is used for?
Answer: Copy
5. MS Excel is used for?
Answer: Calculations
6. WWW stands for?
Answer: World Wide Web
Mistakes I Made
1. Ignoring basics
But questions come from basics.
2. Confusing RAM & ROM
Very common mistake.
3. Not learning shortcut keys
Lost easy marks.
One Small Insight
Computer section is easy scoring.
But only if basics are clear.
One Relatable Example
Sometimes I knew the answer, but got confused between two options.
Now I read question slowly and think.
My Personal Tips
1. Focus on basics
No need to go deep.
2. Practice MCQs
Very important.
3. Revise shortcut keys
Daily.
4. Stay calm
Don’t rush.
Final Thoughts
Computer Knowledge for OSSSC exams is not difficult.
But don’t ignore it.
Just remember:
- Learn basics
- Practice regularly
- Revise daily
Even 30–40 minutes is enough.
MCQ Practice Rules
- Read question carefully
- Don’t confuse similar terms
- Eliminate wrong options
- Revise mistakes
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