All Free Computer Science and IT MCQs with Answers

71. In IT terminology failure in the kernel is called as:

• A. Crash
• B. Crash dump
• C. Dump
• D. kernel error

Explanation: A failure that causes the operating-system kernel to stop functioning is generally called a crash. A crash dump is the diagnostic data recorded after such a failure, not the failure itself.

72. What is the name of a memory buffer used to accommodate a speed differential?

• A. Cache
• B. Stack Pointer
• C. Accumulator
• D. Disc (SSC CG)

Explanation: A cache is a high-speed memory buffer that helps bridge speed differences between the processor and slower memory or devices. The more precise general term is buffer, but it is not listed among the options.

73. The first computer made available for commercial use was________?

• A. MANIAC
• B. ENIAC
• C. UNIVAC
• D. EDSAC

Explanation: UNIVAC I was the first commercially produced computer supplied to business and government users in the usual historical account. ENIAC was an earlier electronic computer, but it was not the first generally available commercial system.

74. Which of the following commands is called as three-finger salute in computers ?

• A. Ctrl + Alt + Delete
• B. Ctrl + Shift + Escape
• C. Ctrl + Shift + Enter
• D. Ctrl + Alt + Arrow key

Explanation: Ctrl+Alt+Delete is known as the three-finger salute and historically opened security or system-management options in Windows. Ctrl+Shift+Esc directly opens Task Manager in modern Windows but is not the traditional salute.

75. Which of the following is used for very high speed searching applications ?

• A. Flash Memory
• B. Content-addressable Memory
• C. Dynamic Random Access Memory
• D. Static Random Access Memory

Explanation: Content-addressable memory searches by stored content rather than by an address, making it suitable for very high-speed lookup applications. RAM and flash memory are general storage technologies rather than content-search memories.

76. The term GIGO is related to?

• A. Flexibility
• B. Versatility
• C. Automatic
• D. Accuracy

Explanation: GIGO means garbage in, garbage out: incorrect input produces incorrect output, highlighting the dependence of computer results on input accuracy. It is not a measure of flexibility or versatility.

77. In Windows XP, what does 'XP' stands for?

• A. eXPensive
• B. eXPlore
• C. eXPerience
• D. eXtra Power

Explanation: In Windows XP, XP is commonly expanded as eXPerience, referring to the operating system's user experience. The capitalization is a branding style rather than a technical acronym.

78. Arithmetic operations are performed by ______?

• A. AU
• B. CU
• C. ALU
• D. LU

Explanation: The Arithmetic Logic Unit, or ALU, performs arithmetic and logical operations within the CPU. The control unit coordinates operations but does not perform the calculations itself.

79. Which of the following is the founder of Snapchat?

• A. Bill Gates
• B. Evan Spiegel
• C. Robert E Kahn
• D. Steve Woziak

Explanation: Evan Spiegel co-founded Snapchat with Bobby Murphy and Reggie Brown and served as its chief executive. The other listed people are associated with Microsoft, networking, or Apple rather than Snapchat.

80. Which device converts data and instrument in a form that computer understand?

• A. Input
• B. Output
• C. Storage
• D. Memory

Explanation: An input device converts data from a user or the physical environment into signals the computer can process. Keyboards, mice, and microphones are examples of input devices.