Class 8 | Lesson 2 - Computer Hardware | Introduction to ICT - Questions & Answers | Assam SCERT Book 2025-26
1. Mark True or False:
a) RAM is a volatile memory.
☐ True ☐ False
b) Blu-ray discs can store up to 700 MB of data.
☐ True ☐ False
c) 1024 MB is equal to 1GB.
☐ True ☐ False
d) CDs are magnetic storage mediums.
☐ True ☐ False
e) Printer is an output device.
☐ True ☐ False
Answer:
a) True
b) False
c) True
d) False
e) True
2. Match column A with column B:
| Column A | Column B |
|---|---|
| Del Key | makes letters from uppercase to lowercase and from lowercase to uppercase. |
| Enter Key | creates one space when pressed once between words. |
| Shift Key | deletes the character to the left of the cursor, helping to correct typing mistakes. |
| Esc Key | used to start a new line or confirm an action. |
| Space Key | used to remove the selected texts, files, or objects. |
| Backspace Key | used to cancel the last operation, close dialogue boxes, and exit screens in software applications. |
Answer:
| Column A | Column B |
|---|---|
| Del Key | used to remove the selected texts, files, or objects. |
| Enter Key | used to start a new line or confirm an action. |
| Shift Key | makes letters from uppercase to lowercase and from lowercase to uppercase. |
| Esc Key | used to cancel the last operation, close dialogue boxes, and exit screens in software applications. |
| Space Key | creates one space when pressed once between words. |
| Backspace Key | deletes the character to the left of the cursor, helping to correct typing mistakes. |
3. Answer the following questions:
a) Write the names of the main parts of a computer.
Answer: The main parts of a computer are - Monitor, System Unit, Keyboard and Mouse.
b) What is the name of the hand-held pointing device that detects two-dimensional motion relative to a surface?
Answer: Mouse.
c) Which input device allows us to capture audio-visuals and stream them to a computer?
Answer: Webcam.
d) Which button of a Mouse is used to move the page up and down?
Answer: Scroll button.
e) What is ROM? Mention its different types.
Answer: ROM (Read Only Memory) is a type of non-volatile memory that stores permanent data. Different types of ROM are -
- MROM (Masked Read Only Memory)
- PROM (Programmable Read Only Memory)
- EPROM (Erasable Programmable Read Only Memory)
- EEPROM (Electrically Erasable Programmable Read Only Memory)
- Flash ROM
f) What is Cache memory?
Answer: Cache memory is a small, high-speed memory inside the CPU. It keeps frequently used data to make the computer work faster.
g) Define Microprocessors.
Answer: A microprocessor is the brain of the computer built on a single IC (Integrated Circuit) chip. It performs all calculations and controls the tasks of the computer.
h) Mention any two magnetic storage mediums.
Answer: Two examples of magnetic storage mediums are Floppy Disk and Hard Disk Drive (HDD).
i) What is the basic difference between a DVD and a Blu-ray disc?
Answer:
| DVD | Blu-ray disc |
|---|---|
| A DVD has a storage capacity of two different sizes – 4.7 GB and 8.5 GB. | A Blu-ray disc has a storage capacity of up to 25 GB. |
4. Find out the input devices and output devices from the box given below and make two lists.
Keyboard, Monitor, Mouse, Scanner, Speaker, Touchpad, Printer, Microphone, Webcam, Projector, Barcode reader
Answer:
Input Devices - Keyboard, Mouse, Scanner, Touchpad, Microphone, Webcam, Barcode reader
Output Devices - Monitor, Speaker, Printer, Projector
