CCC Chapter-1 Test

1. Which of the following is NOT a function of an operating system? 

a) Memory management 

b) File management 

c) Compiling source code 

d) Process scheduling

Correct Answer: c) Compiling source code Explanation: Compiling source code is a function of a compiler, not the operating system. The OS handles memory management, file management, and process scheduling.

2. What is virtual memory in an operating system? 

a) The physical memory of the computer

b) The illusion of having more RAM than physically available

c) The backup memory used when the system crashes

d) A type of network memory for distributed systems

Correct Answer: b) The illusion of having more RAM than physically available Explanation: Virtual memory allows the operating system to use disk space as an extension of RAM, giving the illusion of a larger available memory than physically installed.

3. Who is known as the "father of the computer"?  

a)Alan Turing

b) Charles Babbage

c) John von Neumann

d) Bill Gates

Correct Answer: b) Charles Babbage Explanation: Charles Babbage is considered the father of the computer due to his concept of the Analytical Engine, a mechanical general-purpose computing device designed in the 1830s.

4. Who is credited with inventing the first computer mouse? 

a) Steve Jobs

b) Vannevar Bush

c) Douglas Engelbart

d) Bill Gates

Correct Answer: c) Douglas Engelbart

Explanation: Douglas Engelbart invented the first computer mouse in 1964, which he demonstrated as part of a larger vision for human-computer interaction.

2. The first programmable mechanical computer was developed by:

a) Blaise Pascal

b) Charles Babbage

c) Konrad Zuse

d) John Atanasoff

Correct Answer: b) Charles Babbage

Explanation: Charles Babbage designed the Analytical Engine, the first programmable mechanical computer, in the 1830s. It is considered a precursor to modern computers.

4. The first electronic general-purpose computer, ENIAC, was developed in the year:

a) 1936

b) 1945

c) 1951

d) 1960

Correct Answer: b) 1945

Explanation: ENIAC (Electronic Numerical Integrator and Computer), completed in 1945, is considered the first general-purpose electronic computer.

5. Which of the following computers used punched cards for input and output operations?

a) UNIVAC I

b) IBM 1401

c) ENIAC

d) Mark I

Correct Answer: b) IBM 1401

Explanation: IBM 1401, introduced in 1959, used punched cards for input and output operations. It became one of the most popular early computers for business and scientific applications.

6. Which company introduced the first personal computer (PC) for mass market use in 1975?

a) IBM

b) Microsoft

c) Apple

d) MITS

Correct Answer: d) MITS

Explanation: The Altair 8800, introduced in 1975 by MITS (Micro Instrumentation and Telemetry Systems), is considered the first personal computer designed for the mass market.

7. The concept of stored-program computers was first introduced by:

a) John von Neumann

b) Alan Turing

c) Konrad Zuse

d) Charles Babbage

Correct Answer: a) John von Neumann

Explanation: John von Neumann proposed the stored-program computer architecture, which became the foundation for modern computing. His ideas are the basis of most computer systems today.

8. Which of the following is known as the first electronic programmable computer?

a) ENIAC

b) Z3

c) UNIVAC

d) Atanasoff-Berry Computer (ABC)

Correct Answer: b) Z3

Explanation: The Z3, designed by Konrad Zuse in 1941, is considered the first electronic programmable computer, capable of performing calculations automatically.

9. What was the main function of the Colossus computer during World War II?

a) Numerical calculations for artillery targeting

b) Breaking encrypted German messages

c) Managing military logistics

d) Simulating nuclear reactions

Correct Answer: b) Breaking encrypted German messages

Explanation: Colossus, developed by British engineers during WWII, was used to break encrypted messages from the German Lorenz cipher, which contributed to the Allied victory.

10. Which computer was the first to be commercially successful in the 1950s?

a) UNIVAC I

b) ENIAC

c) IBM 360

d) PDP-1

Correct Answer: a) UNIVAC I

Explanation: UNIVAC I (Universal Automatic Computer I), delivered in 1951, was the first commercially successful computer, used by both government and private sectors.

11. The invention of the microprocessor is attributed to which company?

a) Intel

b) AMD

c) IBM

d) Texas Instruments

Correct Answer: a) Intel

Explanation: Intel introduced the first microprocessor, the Intel 4004, in 1971, revolutionizing the computer industry by enabling personal computers and smaller, more affordable devices.

12. Which of these was the first commercially available minicomputer?

a) IBM 7090

b) DEC PDP-8

c) UNIVAC I

d) ENIAC

Correct Answer: b) DEC PDP-8

Explanation: The DEC PDP-8, introduced in 1965, was the first commercially successful minicomputer, significantly more affordable and smaller than the large mainframes of the time.

13. Which programming language was developed by Grace Hopper and became widely used in the 1950s?

a) Java

b) COBOL

c) C++

d) Fortran

Correct Answer: b) COBOL

Explanation: COBOL (Common Business-Oriented Language) was developed in the 1950s by Grace Hopper and others to support business, finance, and administrative systems.

14. Which of the following was the first operating system to support multitasking?

a) MS-DOS

b) UNIX

c) Windows XP

d) Linux

Correct Answer: b) UNIX

Explanation: UNIX, developed in the 1960s and 1970s at AT and T Bell Labs, was the first widely used operating system to support multitasking, allowing multiple processes to run simultaneously.

15. Which company created the first graphical user interface (GUI)-based personal computer?

a) IBM

b) Apple

c) Microsoft

d) Xerox

Correct Answer: b) Apple

Explanation: Apple created the first GUI-based personal computer, the Apple Lisa, introduced in 1983, and later the Macintosh, which popularized the graphical interface in personal computing.

15. Which part of the computer stores the BIOS settings?

a) RAM

b) Hard Drive

c) ROM

d) CPU

Correct Answer: c) ROM

Explanation: The BIOS (Basic Input Output System) is stored in ROM, which retains the data even when the computer is powered off.

16. The mouse is classified as which type of device?

a) Input device

b) Output device

c) Storage device

d) Communication device

Correct Answer: a) Input device

Explanation: The mouse is an input device used to interact with the graphical user interface (GUI) of a computer.

17. What is the function of the Control Unit (CU) in the CPU?

a) Perform calculations

b) Control the flow of data

c) Store data

d) Cache frequently used data

Correct Answer: b) Control the flow of data

Explanation: The Control Unit (CU) in the CPU directs the operation of the processor by controlling the flow of data between the CPU, memory, and other components.

18. Which of the following is a characteristic of SSD (Solid State Drive) compared to HDD (Hard Disk Drive)?

a) Slower read/write speeds

b) Uses moving parts

c) No moving parts

d) Less expensive

Correct Answer: c) No moving parts

Explanation: SSDs have no moving parts, making them faster and more durable than traditional HDDs, which use spinning disks.

19. Which of the following is not a type of computer memory?

a) DRAM

b) SRAM

c) Flash Memory

d) Power Supply

Correct Answer: d) Power Supply

Explanation: Power supply is not a type of memory. DRAM, SRAM, and Flash Memory are all types of computer memory used for different purposes.

20. Which of the following devices is primarily used to display output?

a) Printer

b) Keyboard

c) Monitor

d) Mouse

Correct Answer: c) Monitor

Explanation: A monitor is an output device used to display visual output from the computer, such as text, images, and videos.

21. What is the primary function of the Arithmetic Logic Unit (ALU) in a CPU?

a) Perform data storage

b) Execute instructions

c) Perform arithmetic and logical operations

d) Control input/output operations

Correct Answer: c) Perform arithmetic and logical operations

Explanation: The ALU is responsible for performing arithmetic and logical operations, such as addition, subtraction, and comparisons in the CPU.

22. Which type of memory is used to store the data that the CPU is currently working on?

a) ROM

b) Flash Memory

c) RAM

d) Hard Drive

Correct Answer: c) RAM

Explanation: RAM (Random Access Memory) stores data that is actively being used or processed by the CPU. ROM, Flash, and Hard Drives are not used for active processing.

23. Which of the following is an example of a wireless input device?

a) USB keyboard

b) Bluetooth mouse

c) Wired scanner

d) Optical mouse

Correct Answer: b) Bluetooth mouse

Explanation: A Bluetooth mouse is an example of a wireless input device that communicates with the computer through Bluetooth technology.

24. Which of the following is true about the difference between RAM and ROM?

a) RAM is non-volatile, and ROM is volatile.

b) RAM is used for permanent storage, and ROM is used for temporary storage.

c) ROM is read-only, and RAM can be both read and written.

d) ROM is faster than RAM.

Correct Answer: c) ROM is read-only, and RAM can be both read and written.

Explanation: ROM is non-volatile and stores firmware that can only be read, while RAM is volatile and can be both read from and written to.

25. Which of the following is an example of an output device that produces sound?

a) Monitor

b) Speaker

c) Keyboard

d) Scanner

Correct Answer: b) Speaker

Explanation: A speaker is an output device that converts digital audio data into sound, allowing the user to hear the output from the computer.

26. Which of the following is the fastest type of memory?

a) Hard Disk

b) RAM

c) Cache Memory

d) Flash Memory

Correct Answer: c) Cache Memory

Explanation: Cache memory is the fastest type of memory and is located close to the CPU to store frequently used data for quick access.

27. What is the main purpose of the Control Unit in a CPU?

a) Perform calculations

b) Fetch instructions from memory

c) Store data in RAM

d) Control the movement of data

Correct Answer: b) Fetch instructions from memory

Explanation: The Control Unit (CU) is responsible for fetching instructions from memory and decoding them for execution by the CPU.

28. Which of the following is a type of permanent storage?

a) RAM

b) Cache memory

c) Hard Disk

d) Register

Correct Answer: c) Hard Disk

Explanation: The hard disk is a type of permanent storage used to store data even when the computer is powered off. RAM and Cache are temporary storage types.

29. What is the main function of the CPU's register?

a) Store permanent data

b) Perform arithmetic operations

c) Store instructions and data temporarily

d) Control data flow

Correct Answer: c) Store instructions and data temporarily

Explanation: Registers are small, fast storage areas inside the CPU used to temporarily store instructions and data that the CPU is currently processing.

30. Which of the following is a disadvantage of solid-state drives (SSD) over hard disk drives (HDD)?

a) Faster data access speeds

b) Higher storage capacity

c) Higher cost per GB of storage

d) Greater durability

Correct Answer: c) Higher cost per GB of storage

Explanation: SSDs tend to be more expensive per gigabyte of storage than traditional HDDs, though they are faster and more durable.

31. Which of the following is a type of memory that is used to store the BIOS settings of a computer?

a) RAM

b) ROM

c) Flash memory

d) Hard disk

Correct Answer: b) ROM

Explanation: The BIOS settings are stored in ROM (Read-Only Memory), which retains data even when the computer is powered off.

32. Which of the following is an example of an input device used for capturing images?

a) Speaker

b) Printer

c) Scanner

d) Monitor

Correct Answer: c) Scanner

Explanation: A scanner is an input device used to capture images, documents, or objects and convert them into digital format for processing by the computer.

33. What does the acronym "USB" stand for in computing?

a) Universal Serial Bus

b) Unified System Bus

c) Universal Service Bus

d) Universal Standard Base

Correct Answer: a) Universal Serial Bus

Explanation: USB stands for Universal Serial Bus, which is a widely used interface for connecting devices such as keyboards, mice, and external storage devices to a computer.

34. Which of the following is an example of an output device used to produce hard copies of documents?

a) Printer

b) Monitor

c) Speaker

d) Keyboard

Correct Answer: a) Printer

Explanation: A printer is an output device that produces hard copies of digital documents on paper.

35. What type of memory is used for caching data that is frequently accessed by the CPU?

a) ROM

b) RAM

c) Cache Memory

d) Flash Memory

Correct Answer: c) Cache Memory

Explanation: Cache memory is a small and high-speed memory located close to the CPU, used to store frequently accessed data for faster retrieval.

36. What type of memory is used to store the computer’s operating system and essential programs that need to run at startup?

a) Cache Memory

b) ROM

c) RAM

d) Flash Memory

Correct Answer: b) ROM

Explanation: ROM (Read-Only Memory) stores critical startup instructions, including the operating system’s bootloader and firmware, and retains data even when the power is off.

37. Which of the following input devices is used primarily for drawing or signing on a computer?

a) Keyboard

b) Mouse

c) Graphics Tablet

d) Scanner

Correct Answer: c) Graphics Tablet

Explanation: A graphics tablet is an input device used by artists and designers to draw or write directly onto the computer screen.

38. What does the acronym "GPU" stand for in computing?

a) General Purpose Unit

b) Graphics Processing Unit

c) Graphical Performance Unit

d) General Programming Unit

Correct Answer: b) Graphics Processing Unit

Explanation: A GPU is a specialized processor primarily responsible for rendering images and videos, and performing other tasks related to graphics processing.

39. Which of the following is used to store data temporarily and is fast but volatile?

a) ROM

b) Hard Drive

c) RAM

d) CD/DVD

Correct Answer: c) RAM

Explanation: RAM (Random Access Memory) is used for temporary data storage and is volatile, meaning it loses data when the computer is powered off.

40. Which device is responsible for converting digital data to analog signals for transmission over phone lines?

a) Modem

b) Router

c) Switch

d) Network Interface Card (NIC)

Correct Answer: a) Modem

Explanation: A modem (Modulator-Demodulator) is used to convert digital data into analog signals for transmission over telephone lines and vice versa.

41. What is the main function of the Control Unit (CU) in the CPU?

a) Perform arithmetic operations

b) Fetch and decode instructions

c) Store data

d) Execute program code

Correct Answer: b) Fetch and decode instructions

Explanation: The Control Unit (CU) is responsible for fetching instructions from memory, decoding them, and directing the operation of the CPU components.

42. Which of the following is an example of a non-volatile memory?

a) RAM

b) ROM

c) Cache Memory

d) CPU Register

Correct Answer: b) ROM

Explanation: ROM (Read-Only Memory) is non-volatile, meaning it retains data even when the power is turned off. RAM and Cache Memory are volatile.

43. Which of the following is an example of a storage device that uses magnetic technology?

a) Flash Drive

b) Solid-State Drive (SSD)

c) Hard Disk Drive (HDD)

d) Optical Disk

Correct Answer: c) Hard Disk Drive (HDD)

Explanation: Hard Disk Drives (HDD) use magnetic technology to read and write data, while SSDs use flash memory, and optical disks use laser technology.

44. What is the primary purpose of a computer’s power supply unit?

a) Convert electrical power to a usable form

b) Store data permanently

c) Process data

d) Output data to the monitor

Correct Answer: a) Convert electrical power to a usable form

Explanation: The power supply unit (PSU) converts electrical power from an outlet into the appropriate voltage needed for the computer's components.

45. Which of the following devices is used to read data stored on optical discs like CDs or DVDs?

a) Optical Drive

b) Hard Disk Drive

c) Flash Drive

d) Network Interface Card (NIC)

Correct Answer: a) Optical Drive

Explanation: An optical drive uses lasers to read and write data on optical discs like CDs, DVDs, and Blu-ray discs.

46. Which of the following components is responsible for increasing the speed of data processing in a computer system?

a) CPU

b) Memory

c) Motherboard

d) Bus

Correct Answer: a) CPU

Explanation: The CPU (Central Processing Unit) is responsible for executing instructions and performing calculations, thus directly affecting the speed of data processing.

47. What is the main function of a network interface card (NIC)?

a) Connect the computer to a network

b) Process data

c) Store files permanently

d) Display data on the screen

Correct Answer: a) Connect the computer to a network

Explanation: A Network Interface Card (NIC) enables a computer to connect to a network, such as a local area network (LAN) or the internet.

48. Which of the following is true about the function of a keyboard in a computer system?

a) It only provides input through special function keys

b) It is used for inputting data and commands to the computer

c) It is used for processing data

d) It stores input data permanently

Correct Answer: b) It is used for inputting data and commands to the computer

Explanation: A keyboard is an input device that allows users to enter text, numbers, and commands into the computer.

49. Which of the following is the function of the ALU (Arithmetic Logic Unit)?

a) Store data

b) Perform arithmetic and logic operations

c) Control input/output operations

d) Fetch data from memory

Correct Answer: b) Perform arithmetic and logic operations

Explanation: The Arithmetic Logic Unit (ALU) is responsible for carrying out arithmetic operations like addition, subtraction, and logic operations such as comparisons in the CPU.

50. What is the main advantage of solid-state drives (SSDs) over traditional hard disk drives (HDDs)?

a) SSDs are slower but cheaper

b) SSDs are faster and more durable

c) HDDs are smaller and lighter

d) HDDs use less power

Correct Answer: b) SSDs are faster and more durable

Explanation: SSDs offer faster data access speeds and are more durable because they have no moving parts, unlike HDDs which use spinning disks.

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