Kips Class 9 AI Unit 3: Information and Communication Technology Skills (Peripheral Devices)

Unit 3: Information and Communication Technology Skills (Peripheral Devices)

Assessment Time
A. Fill in the blanks:
1. A speaker converts an alternating electrical current into sound.
2. Laser printers use a laser beam and powdered ink to produce fine print.
3. A plotter is a vector graphic printing device.
4. Hard disk is made up of a collection of disks known as platters.
5. Flash drive is plugged into the computer USB port.


B. State True or False:
1. A joystick is a small instrument shaped like a pen used to provide input to mobile, monitors and tablets. (False)
Correct Answer:
A stylus is a small instrument shaped like a pen used to provide input to mobile, monitors and tablets.
2. A bar code is a computer readable representation of information, present in visual format. (True)
3. A monitor is also called Visual Display Unit (VDU). (True)
4. The picture on a monitor is made up of thousands of small coloured dots called Pixars. (False)
Correct Answer:
The picture on a monitor is made up of thousands of small coloured dots called pixels.
5. LED monitors offer better colour quality, clarity, and display than the LCD monitors. (True)

C. Answer the Following Questions:
1. What are peripheral devices? Give some examples.
Answer:
The internal and external devices that connect to the computer directly and add functionality to it are called peripheral devices.

2. What is a Scanner? What are its types?
Answer:
It is an input device that scans text, images, and objects optically. There are three types of scanner:
• Drum Scanner
• Flatbed Scanner
• Handheld Scanner

3. What do you understand by a Monitor? Define pixels.
Answer:
Monitor is the most common output device. It is also called as Visual Display Unit (VDU), an electronic visual display for computers. Monitor display pictures by dividing the display screen into thousands (or millions) of minute dots called pixels, arranged in rows and columns.

4. What is HDD? Briefly explain its configuration.
Answer:
It is the most common storage device for storing a large amount of data. It is also called HD or HDD (Hard Disk Drive) or Winchester Disk. It is made up of a collection of disks known as platters. Each platter requires two read/write heads one for each side. All the read/write are attached to a single access arm so that they do not move independently. Each platter has the same number of tracks to store data.

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