All Free Computer Science and IT MCQs with Answers

91. The blinking symbol on the computer screen is called ___________?

• A. mouse
• B. logo
• C. hand
• D. cursor

Explanation: The blinking mark showing where the next typed character will appear is the text cursor, also called the insertion point. A mouse is a pointing device, not the blinking screen symbol.

92. Shortcut keys to switch to the next windows ?

• A. Alt + tab
• B. Shift + Tab
• C. Alt + Ctrl
• D. Ctrl + Tab

Explanation: Alt+Tab switches between open application windows in Windows. Ctrl+Tab usually switches between documents or tabs within the same application, which is a different operation.

93. To copy a picture of the screen to the Clipboard use:_________ Command?

• A. Alt Key
• B. Shift key
• C. Print screen
• D. None of these

Explanation: The Print Screen key captures a picture of the screen and places it on the clipboard in traditional Windows usage. Alt alone or Shift alone does not perform this capture command.

94. What is the name of the operating system which was originally designed by scientists and engineers for use by scientists and engineers?

• A. MS DOS
• B. UNIX
• C. OS/2
• D. None of the above

Explanation: UNIX was developed at Bell Labs by researchers and engineers and became widely used in scientific and technical environments. MS-DOS and OS/2 were primarily designed as personal-computer operating systems.

95. ___________ memory loses content, when power is lost.

• A. Non volatile
• B. volatile
• C. Static
• D. None of these

Explanation: Volatile memory requires continuous power to preserve its data, so its contents disappear when the power is removed. RAM is the common example, whereas non-volatile memory retains data.

96. Who is called the "grand father" of the computer?

• A. Blaise Pascal
• B. Charles Babbage
• C. Joseph Jacquard
• D. Dr. Herman Hollerith

Explanation: Charles Babbage is called the grandfather or father of the computer because his Analytical Engine introduced important programmable-computing concepts. Pascal, Jacquard, and Hollerith also made major contributions but are not given this title.

97. Brain also known as the first computer virus for MS-DOS was written by two brothers belonging to which among the following countries?

• A. Malaysia
• B. India
• C. Pakistan
• D. Iran

Explanation: The Brain boot-sector virus, commonly regarded as the first MS-DOS computer virus, was written by two brothers from Pakistan. It was created in Lahore in 1986.

98. Which is the core of the operating system?

• A. Shell
• B. Kernel
• C. Commands
• D. Script

Explanation: The kernel is the central core of an operating system, managing memory, processes, hardware access, and system resources. The shell is an interface through which users or programs interact with the kernel.

99. In what respect human beings are superior to computers?

• A. Diligence
• B. Intelligence
• C. Slavery
• D. Reliability

Explanation: Human intelligence includes reasoning, judgment, creativity, and the ability to handle unfamiliar situations, areas where computers traditionally depend on programmed instructions. Computers are generally superior in speed, diligence, and consistency rather than intelligence in this broad sense.

100. Which is termed as the fastest Computer in the World recently in June 2020?

• A. sequoia
• B. Fugaku
• C. Tianhe-2A
• D. Frontera

Explanation: Japan's Fugaku supercomputer became the world's fastest in the June 2020 TOP500 ranking, overtaking IBM's Summit. The other choices were also powerful supercomputers but ranked lower at that time.