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 — Hardware Important Questions with Answers (MCQ test)
IT basics, hardware, software, internet safety and MS Office for Class 9. Showing 18 of 18 on page 1 / 1.
- अध्याय चुनें
- MCQ टेस्ट दें — उत्तर पहले छिपा है
- View answer से मिलाएँ
- 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 1 · 18 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.
Registers are
- A. classroom benches
- B. tiny fastest storage inside the CPU
- C. email folders
- D. WAN cables
View the correct answer
Correct option: B — tiny fastest storage inside the CPU
They hold data the ALU is using right now.
A port is
- A. a school gate only
- B. a socket such as USB or HDMI to connect devices
- C. a type of font
- D. a search engine
View the correct answer
Correct option: B — a socket such as USB or HDMI to connect devices
Match the cable to the port.
Clock speed of a CPU is often measured in
- A. litres
- B. GHz (gigahertz)
- C. kilograms
- D. pages per minute only
View the correct answer
Correct option: B — GHz (gigahertz)
Higher is not the only measure of speed.
HDMI is commonly used to
- A. carry high-definition video and audio to a display
- B. store 1 KB only
- C. compile Java
- D. filter spam
View the correct answer
Correct option: A — carry high-definition video and audio to a display
A display port/cable standard.
A touchpad is
- A. an output printer
- B. a pointing input device on a laptop
- C. a WAN
- D. ROM
View the correct answer
Correct option: B — a pointing input device on a laptop
It moves the pointer.
Which is both input and output?
- A. A classic CRT as only output; a touchscreen kiosk
- B. A speaker
- C. A barcode wand only
- D. A microphone only
View the correct answer
Correct option: A — A classic CRT as only output; a touchscreen kiosk
Touch display shows and responds.
Which statement is true?
- A. Software can replace all hardware
- B. Hardware is the physical parts; software is the instructions
- C. RAM is an output printer
- D. A mouse is an OS
View the correct answer
Correct option: B — Hardware is the physical parts; software is the instructions
Both are needed.
Which cooling device is common in a desktop?
- A. Plotter
- B. CPU fan / heatsink
- C. Scanner lamp as the only cooler
- D. Stylus
View the correct answer
Correct option: B — CPU fan / heatsink
Heat shortens hardware life.
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Class 9 Computer में कितने प्रश्न हैं? 255 महत्वपूर्ण प्रश्न: 174 MCQ, 50 लघु, 31 दीर्घ।
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