Which of the following is an input device?
- A. Monitor
- B. Speaker
- C. Keyboard
- D. Projector
View the correct answer
Correct option: C — Keyboard
A keyboard sends data into the computer; monitor and speaker are output.
Class 9 · कंप्यूटर · 255+ Q&A
Class 9 Computer Important Questions with Answers (MCQ test)
IT basics, hardware, software, internet safety and MS Office for Class 9. Showing 20 of 174 on page 1 / 9.
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- MCQ टेस्ट दें — उत्तर पहले छिपा है
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- अगला पेज · एक स्क्रीन पर 20 प्रश्न
All chapters
1. Hardware
2. Software
3. Operating System
4. Memory and Storage
5. Input and Output
6. Networking
7. Internet and Email
8. Cyber Safety
9. MS Office
10. Number System
11. IPR and Digital Ethics
Page 1 of 9 · 174 questions in this view
The brain of the computer is the
- A. Hard disk
- B. CPU
- C. UPS
- D. Plotter
View the correct answer
Correct option: B — CPU
The Central Processing Unit fetches, decodes and executes instructions.
ALU stands for
- A. Always Logical Unit
- B. Arithmetic Logic Unit
- C. Analog Link USB
- D. Array Late Update
View the correct answer
Correct option: B — Arithmetic Logic Unit
ALU performs arithmetic and logical operations inside the CPU.
Which is a storage device?
- A. Mouse
- B. SSD / hard disk
- C. Microphone
- D. Joystick only as storage
View the correct answer
Correct option: B — SSD / hard disk
Hard disk and SSD store data permanently until deleted.
UPS is used to
- A. increase RAM permanently
- B. give backup power during a cut
- C. print colour pages
- D. browse faster always
View the correct answer
Correct option: B — give backup power during a cut
Uninterruptible Power Supply protects against sudden shutdown.
A scanner is
- A. only an output device
- B. an input device that digitises paper
- C. a programming language
- D. an email protocol
View the correct answer
Correct option: B — an input device that digitises paper
It converts printed images or text into digital form.
Which printer uses toner like a photocopier?
- A. Dot-matrix only
- B. Laser printer
- C. Plotter pen only
- D. Braille slate
View the correct answer
Correct option: B — Laser printer
Laser printers are common in school offices for fast text.
Motherboard is
- A. a software office suite
- B. the main circuit board that connects CPU, RAM and slots
- C. an internet browser
- D. a cyber law
View the correct answer
Correct option: B — the main circuit board that connects CPU, RAM and slots
Other cards and drives plug into it.
Which is volatile memory?
- A. ROM
- B. RAM
- C. DVD
- D. Pen drive
View the correct answer
Correct option: B — RAM
RAM loses contents when power is off.
A plotter is best used to
- A. type essays
- B. draw large engineering or map drawings
- C. scan fingerprints only
- D. send email
View the correct answer
Correct option: B — draw large engineering or map drawings
It is a specialised output device.
System software is mainly meant to
- A. draw greeting cards only
- B. run and manage the computer hardware
- C. replace the CPU
- D. print without a printer
View the correct answer
Correct option: B — run and manage the computer hardware
OS, device drivers and utilities are system software.
MS Word is an example of
- A. system software only
- B. application software
- C. an operating system
- D. a hardware port
View the correct answer
Correct option: B — application software
It helps the user write documents.
A compiler is used to
- A. charge the battery
- B. translate a high-level program into machine code
- C. scan photos
- D. block all websites
View the correct answer
Correct option: B — translate a high-level program into machine code
Class 9 programming basics: source code is translated before running.
Antivirus software is a
- A. game
- B. utility that detects malicious programs
- C. type of RAM
- D. printer driver only
View the correct answer
Correct option: B — utility that detects malicious programs
It must be updated; it is not a complete guarantee.
An interpreter differs from a compiler because it
- A. prints faster
- B. translates and runs code line by line
- C. stores more songs
- D. is a type of mouse
View the correct answer
Correct option: B — translates and runs code line by line
Python-style languages often use interpreters.
Device drivers are needed to
- A. write poems
- B. let the OS talk to a particular printer or camera
- C. increase chair height
- D. create IPR
View the correct answer
Correct option: B — let the OS talk to a particular printer or camera
Without a driver the hardware may not work correctly.
Freeware means
- A. the software source must be secret always
- B. you may use it without paying a licence fee, as the author allows
- C. it is always open source
- D. it is a virus
View the correct answer
Correct option: B — you may use it without paying a licence fee, as the author allows
Read the licence; freeware is not always open source.
Open-source software allows you to
- A. steal any movie
- B. study and often modify the source code under its licence
- C. bypass school firewalls legally always
- D. format the BIOS as a game
View the correct answer
Correct option: B — study and often modify the source code under its licence
Linux distributions are a common classroom example.
An operating system is
- A. a physical keyboard
- B. system software that manages hardware and programs
- C. only a web browser
- D. a type of scanner
View the correct answer
Correct option: B — system software that manages hardware and programs
Windows, Linux and Android are OS families — not a fictional Windows 12 as a fact.
Which of these is an operating system?
- A. MS Excel
- B. Ubuntu Linux
- C. Google Chrome only
- D. JPEG
View the correct answer
Correct option: B — Ubuntu Linux
Excel and Chrome run on top of an OS.
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Class 9 Computer में कितने प्रश्न हैं? 255 महत्वपूर्ण प्रश्न: 174 MCQ, 50 लघु, 31 दीर्घ।
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