CBSE-SOLUTIONS
CLASS-9
PART-A
UNIT-III Information Communication Technology
Chapter- 4 Peripheral Devices
1. What data does a webcam transmit into a computer?
(a) Pictures/Videos (b) Sound
(c) Letters and numbers (d) Clicks and movement
Answer: (a) Pictures/Videos
2. What data does a microphone transmit to a computer?
(a) Pictures/Video (b) Sound
(c) Letters and numbers (d) Clicks and movement
Answer: (b) Sound
3. What are the three general types of peripheral devices?
(a) Input, output and storage (b) Mouse, keyboard and monitor
(c) Internal, wired external and wireless external (d) Audio, video and print output
Answer: (a) Input, output and storage
B. State ‘T’ for True or ‘F’ for False
1. Input devices allow us to send information to the CPU (Central Processing Unit) to tell the computer what to do.
Answer: T
2. Output devices receive information from the CPU (Central Processing Unit), then translate it into sounds or images that we can understand.
Answer: T
3. Printer is an input device.
Answer: F
4. Mouse is an input device.
Answer: T
C. Answer the following questions
1. What are the different categories of peripheral devices?
Answer: Input devices, Output devices and Storage devices.
2. Name the device used to enter data directly into the computer.
Answer: Keyboard.
3. Name the device used to play games on the computer.
Answer: Joystick.
4. What is the name given to thick and thin lines on any grocery item called? Name the device used to read these lines.
Answer: Bar Code. Device: Bar Code Reader.
5. Name the device used to listen sound from the computer.
Answer: Speakers / Headphones.
6. Name the printer that prints one page at a time.
Answer: Laser Printer.
7. Differentiate between hard copy and soft copy.
Answer:
Hard Copy: Printed on paper (physical).
Soft Copy: Displayed on screen (digital).
8. Name the printer that prints one character at a time.
Answer: Dot Matrix Printer.
9. Name the printer that uses a continuous stream of ink drops to print on paper.
Answer: Inkjet Printer.
10. Name any two external storage devices.
Answer: Pen Drive and External Hard Disk.
11. Which has more capacity- CD or DVD?
Answer: DVD.
12. If you have to take your project from home to school in a digital form, which storage device is best suited for this purpose?
Answer: Pen Drive.
13. What is the use of external hard disk?
Answer: To store large amount of data and for backup.
14. Which device has more storage capacity?
16 GB pen drive or a CD → 16 GB pen drive
16 GB pen drive or 1 TB hard disk → 1 TB hard disk
Answer:
1. 16 GB pen drive
2. 1 TB hard disk
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