All Free Computer Science and IT MCQs with Answers

• A. Gigabyte = 1000 megabytes
• B. Exabyte = 1000 Petabytes
• C. Yottabyte= 1000 Zettabyte
• D. Zettabyte = 1000 Exabyte

Explanation: Yottabyte is the largest named SI decimal unit in the options, and 1 yottabyte equals 1000 zettabytes.

• A. Compiler
• B. Loader
• C. Operating
• D. Assembler

Explanation: A computer needs an operating system to manage hardware and provide the environment in which programs run during booting.

• A. Windows 9 Has a New Look
• B. Windows 9 Snap Layouts
• C. Multiple Desktops in Windows 9
• D. Window 9 Not launched

Explanation: Microsoft did not release Windows 9; it moved from Windows 8.1 to Windows 10, partly to distinguish the new version from older Windows 9x…

• A. Windows+A
• B. Windows+M
• C. Windows+N
• D. Windows+A

Explanation: Windows+M minimizes all open windows and displays the desktop. The Windows+A shortcut is duplicated in the options and is not the standard…

• A. computed
• B. mind
• C. brian
• D. None of These

Explanation: Brain, also called the Brain boot-sector virus, is widely identified as the first IBM PC boot-sector virus.

• A. Viruses
• B. Spam
• C. Portals
• D. None of These

Explanation: Viruses are malicious programs that may be attached to email files and execute when the attachment is opened.

• A. Status bar
• B. Task bar (system tray)
• C. Menu Bar
• D. Launch pad

Explanation: The system tray is part of the taskbar and commonly displays the clock and date along with notification icons.

• A. 36
• B. 44
• C. 52
• D. 54Spreadsheet Software

Explanation: A standard deck contains 52 cards, divided into four suits of 13 cards each. The number 54 applies only when two jokers are included.

• A. ctrl + F4
• B. alt + F4
• C. shift + F4
• D. None of These

Explanation: Alt+F4 closes the active program or window in Windows. Ctrl+F4 usually closes only the current document or tab within a program.

• A. Sloan Duployan System.
• B. Pitman Shorthand
• C. John Robert Gregg's System
• D. Morse Code

Explanation: Pitman Shorthand is traditionally regarded as the most popular shorthand system among the listed choices.

• A. Windows 10
• B. Windows 8
• C. Windows vista
• D. None of these

Explanation: The original Windows 8 removed the traditional Start button from the desktop interface.

• A. AND
• B. OR
• C. NOT
• D. All of these

Explanation: AND, OR, and NOT are all fundamental logic gates used to process binary values.

• A. John Napier
• B. Gottfried Leibnitz
• C. William Oughtred
• D. Blaise Pascal

Explanation: William Oughtred invented the slide rule in the 17th century by applying logarithmic scales to multiplication and division.

• A. Computer Aided Machine
• B. Computer Aided Manufacturing
• C. Computer Automatic Machine
• D. Computer Automatic Manufacturing

Explanation: CAM means Computer-Aided Manufacturing, where computers assist in planning, controlling, or automating manufacturing processes.

• A. Mainframe Computer
• B. Mini Computers
• C. Micro Computers
• D. Super Computers

Explanation: Supercomputers have the greatest processing speed and computational capacity among the listed categories.

• A. I Love You
• B. Nimdad
• C. Melissa
• D. Christmas

Explanation: The ILOVEYOU virus spread globally through email in 2000 and infected millions of computers, making it one of the most widespread viruses…

• A. Gold Mail
• B. Great Mail
• C. Grooming Mail
• D. Google Mail

Explanation: Gmail was originally associated with the name Google Mail, and that name is still used in some countries.

• A. Secondary storage
• B. Auxiliary storage
• C. Mass storage
• D. All of above

Explanation: Storage is called secondary, auxiliary, or mass storage because it retains data for long-term use outside the computer's immediate working…

• A. Iron
• B. Phosphorus
• C. Sodium
• D. Calcium

Explanation: Milk is relatively deficient in iron, so infants relying heavily on milk may need another source of iron.

• A. DICOM
• B. JPEG
• C. BitMap
• D. None of these

Explanation: DICOM, or Digital Imaging and Communications in Medicine, is the standard format and communication protocol for storing and transferring…