Q21. Which of the following devices is primarily used to convert printed documents into digital form?
a) Monitor
b) Printer
c) Scanner
d) Keyboard
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Correct Answer: c) Scanner
Explanation: A scanner is an input device that converts physical documents and images into digital form by scanning them. The digital images can then be stored, edited, or shared electronically.
Q22. What is the function of RAM in a computer?
a) To store data permanently
b) To perform arithmetic operations
c) To temporarily store data and programs in use
d) To provide power to the computer
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Correct Answer: c) To temporarily store data and programs in use
Explanation: RAM (Random Access Memory) is a type of volatile memory used by the computer to temporarily store data and programs that are actively being used, allowing quick access and efficient processing by the CPU.
Q23. Which of the following is NOT a type of computer memory?
a) ROM
b) RAM
c) SSD
d) CPU
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Correct Answer: d) CPU
Explanation: CPU (Central Processing Unit) is the component of a computer that performs processing tasks, while ROM, RAM, and SSD are types of memory used to store data and programs.
Q24. What does SSD stand for in computer storage?
a) Solid State Drive
b) Super Speed Device
c) Storage System Disk
d) Serial Storage Device
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Correct Answer: a) Solid State Drive
Explanation: SSD stands for Solid State Drive, a type of storage device that uses flash memory to store data. It is faster and more reliable than traditional hard disk drives (HDDs) because it has no moving parts.
Q25. Which of the following best describes an output device?
a) A device that provides data to the CPU
b) A device that processes data
c) A device that displays or outputs data from the computer
d) A device that stores data
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Correct Answer: c) A device that displays or outputs data from the computer
Explanation: Output devices, such as monitors and printers, are used to display or output the results of the computer’s processing. They provide information to the user in a readable or usable form.
Q26. What is the primary difference between ROM and RAM?
a) ROM is volatile, while RAM is non-volatile
b) ROM is used for temporary storage, while RAM is used for permanent storage
c) ROM is non-volatile, while RAM is volatile
d) ROM is faster than RAM
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Correct Answer: c) ROM is non-volatile, while RAM is volatile
Explanation: ROM (Read-Only Memory) is non-volatile, meaning it retains data even when the computer is turned off, while RAM (Random Access Memory) is volatile and loses its data when power is lost.
Q27. Which of the following software types helps users perform specific tasks like creating documents or spreadsheets?
a) System software
b) Utility software
c) Application software
d) Firmware
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Correct Answer: c) Application software
Explanation: Application software is designed to help users perform specific tasks, such as word processing, spreadsheet creation, and database management. Examples include Microsoft Word and Excel.
Q28. Which of the following is a key characteristic of open-source software?
a) It is expensive to purchase
b) It has restricted access to the source code
c) The source code is publicly available and modifiable
d) It can only be used by large corporations
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Correct Answer: c) The source code is publicly available and modifiable
Explanation: Open-source software allows users to access, modify, and distribute its source code. This encourages collaboration and innovation among developers and users.
Q29. What is the primary function of an operating system?
a) To develop software
b) To manage hardware and software resources
c) To create documents
d) To browse the internet
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Correct Answer: b) To manage hardware and software resources
Explanation: The operating system (OS) is a critical piece of system software that manages the computer’s hardware, software, memory, and processes, providing a stable environment for applications to run.
Q30. What is the purpose of a computer’s BIOS?
a) To store user files
b) To load the operating system
c) To increase processing speed
d) To manage network connections
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Correct Answer: b) To load the operating system
Explanation: BIOS (Basic Input/Output System) is firmware that initializes and tests the hardware during the booting process and loads the operating system into memory, enabling the computer to start up.