W3LITE: Computer and its components

Which of the following is a non-impact printer?

• Dot-matrix printer that uses pins to strike ribbon
• Inkjet printer that sprays ink onto paper
• Typewriter printer that produces mechanical impressions
• Line printer that uses impact-based printing methods
• Daisy wheel printer that uses rotating print elements

Which type of monitor uses light-emitting diodes?

• CRT monitor using cathode ray tube technology
• LCD monitor using liquid crystal display technology
• LED monitor using light-emitting diode technology
• Plasma monitor using ionized gas display technology
• Analog monitor using voltage-based display signals

What is the main function of storage devices?

• To process data and execute instructions in real time
• To display visual and audio output to users
• To store data and information for future use
• To receive input data from users and devices
• To connect multiple systems through networks

Which of the following is a storage device?

• Mouse used for selecting and interacting with objects
• Monitor used for displaying images and text output
• Flash drive used for storing digital data
• Speaker used for producing sound output
• Keyboard used for entering data and commands

What is the system unit?

• External device used for displaying output information
• Main enclosure containing internal computer components
• Device used for storing data externally in digital format
• Input device used for entering instructions into system
• Communication tool used for connecting computer networks

Why are input devices important in a computer system?

• They allow the computer to store large amounts of data permanently
• They enable users to provide data and instructions for processing
• They display processed results in visual and audio formats
• They connect computers to communication networks globally
• They control internal processes within the central processing unit

Why are output devices necessary?

• They convert user input into digital signals for processing
• They present processed information in a usable form to users
• They store information for long-term retrieval and usage
• They manage internal operations of computer components
• They replace the need for input and storage devices

Why are storage devices considered non-volatile?

• They require constant power supply to retain stored data
• They retain stored data even when the computer is turned off
• They process data faster than volatile memory components
• They are used only for temporary data storage operations
• They function only during active system processing tasks

Why are computers considered fast?

• They rely on manual input to perform calculations quickly
• They perform billions of operations per second
• They store large amounts of data in physical storage
• They connect multiple users through communication systems
• They operate without requiring instructions or data input

Why is accuracy important in computer operations?

• Computers automatically correct all errors without input validation
• Accurate results depend on correct data and instructions
• Accuracy eliminates the need for human supervision entirely
• Accuracy ensures faster processing speed in all operations
• Accuracy reduces the need for storage and memory usage