All Free Computer Science and IT MCQs with Answers

51. Which memory acts as a buffer Between CPU and the main memory ?

• A. RAM
• B. ROM
• C. Static RAM
• D. Cache memory

Explanation: Cache memory is a high-speed buffer between the CPU and main memory, storing frequently needed data and instructions. RAM and ROM are types of memory, but they do not specifically serve this CPU buffer role.

52. Computer is a _______________?

• A. Physical Machine
• B. Electronic Machine
• C. Chemical Machine
• D. Mechanical Machine

Explanation: A computer is an electronic machine that accepts data, processes it, stores it, and produces information. Physical describes its hardware form but not the technology on which it operates.

53. 1GB is equal to______ bytes?

• A. 1 million bytes
• B. 1 trillion bytes
• C. 1 billion bytes
• D. None

Explanation: In the decimal storage convention commonly used in such MCQs, 1 GB equals 1 billion bytes. In binary terminology, 1 GiB equals 1,073,741,824 bytes, which is why the unit distinction matters.

54. What was the name of the first commercially available microprocessor chip

• A. Intel 8008
• B. Intel 8080
• C. Intel 4004
• D. Motorola 6809

Explanation: Intel 4004, released in 1971, is generally recognized as the first commercially available microprocessor. The 8008 and 8080 followed it, while the Motorola 6809 was introduced later.

55. Distributed data entry means that data can be_____________?

• A. Entered at different locations where it originates
• B. Sent to different locations from a central place
• C. Accessed from different places know as distribution points
• D. Distributed through a network

Explanation: Distributed data entry means entering data at the locations where it is generated or collected, rather than sending all source data to one central entry point.

56. Present day computers are based on __________?

• A. Along technology
• B. Hybrid technology
• C. Digital technology
• D. none of the above

Explanation: Modern general-purpose computers process information using discrete binary values, so they are based on digital technology. Hybrid technology combines analogue and digital methods but is not the basis of present-day computers generally.

57. A computer is capable of performing almost any task provided, that it can be?

• A. Coded
• B. Memorised
• C. Analysed
• D. Reduced to a series of logical steps

Explanation: A computer can perform a task when that task can be expressed as a finite series of logical steps, or an algorithm. Merely memorising or analysing a task does not provide executable instructions.

58. A set of processes is deadlock if ?

• A. each process is blocked and will remain so forever
• B. each process is terminated
• C. all processes are trying to kill each other
• D. None of these

Explanation: Deadlock occurs when processes are permanently blocked because each is waiting for a resource held by another process in the set. Termination is not required for a deadlock; the processes typically remain active but unable to proceed.

59. Type/s of Picture is/are?

• A. Vector
• B. Raster
• C. Master
• D. both A & B

Explanation: The two basic categories of computer graphics are raster images, made from pixels, and vector images, defined by lines and mathematical paths. Therefore both listed types are valid.

60. Picture is made of __________?

• A. Lines
• B. Dots
• C. Scratches
• D. Lightings

Explanation: A digital raster picture is built from tiny dots called pixels, with each pixel storing colour information. Lines and lighting may appear in an image, but they are not its basic raster units.