All Free Computer Science and IT MCQs with Answers

391. Android was founded in_________?

• A. 2005
• B. 2003
• C. 2004
• D. 2006

Explanation: Android was founded in 2003 by Andy Rubin, Rich Miner, Nick Sears, and Chris White. Google acquired Android in 2005, which is the date often confused with its founding.

392. The ribbon is used in_________?

• A. Laser Printer
• B. Plotter
• C. Ink-jet printer
• D. Dot Matrix printer

Explanation: A dot-matrix printer uses an inked ribbon struck by print pins to form characters and images. Laser and ink-jet printers use toner or liquid ink instead of a ribbon.

393. Shortcut key to create a New Folder on Windows PC is ___________?

• A. Ctrl+N
• B. Ctrl+Alt+N
• C. Ctrl+Shit+N
• D. None.

Explanation: Ctrl+Shift+N creates a new folder in Windows File Explorer. The option contains a spelling error, ‘Shit’, but clearly intends to mean Shift.

394. Operating system is like a______?

• A. Government
• B. Police
• C. Parliament
• D. All of above

Explanation: An operating system manages hardware resources and coordinates the activities of programs, much like a government manages a country’s resources and operations. The government analogy is the standard single answer; the other comparisons are not equivalent OS functions.

395. Which one is not a nickname of a version of Andriod?

• A. Honeycomb
• B. Cupcake
• C. Gingerbread
• D. Muffin

Explanation: Honeycomb, Cupcake, and Gingerbread were official Android version codenames. Muffin was not an official Android codename, although it is sometimes mentioned as a rumored or proposed name.

396. Windows 10 was launched in which year?

• A. 2012
• B. 2013
• C. 2015
• D. 2014Science

Explanation: Windows 10 was officially released on July 29, 2015. The earlier years refer to development or earlier Windows releases, not the public launch of Windows 10.

397. IC are classified on the basis of_____________?

• A. Manufacturing company
• B. Type of computer
• C. Number of transistors
• D. None of these

Explanation: Integrated circuits are commonly classified as SSI, MSI, LSI, or VLSI according to the number of components or transistors they contain. The number of transistors therefore indicates the IC's integration level.

398. Which of the printers used in conjunction with computers uses dry ink powder?

• A. Daisy wheel printer
• B. Line printer
• C. Laser printer
• D. Thermal printer

Explanation: Laser printers use dry powdered toner, which is transferred to paper and fixed with heat. Daisy-wheel and line printers use impact mechanisms, while thermal printers use heat-sensitive paper or ribbons.

399. Which of the following memories must be refreshed many times per second?

• A. Static RAM
• B. Dynamic RAM
• C. EPROM
• D. ROM

Explanation: Dynamic RAM stores bits in capacitors that gradually lose their charge, so it must be refreshed repeatedly. Static RAM retains data while powered and does not require this refresh cycle.

400. The programs which are as permanent as hardware and stored in ROM is known as___________?

• A. Hardware
• B. Software
• C. Firmware
• D. ROM ware

Explanation: Firmware is software stored in non-volatile memory such as ROM or flash and used to control hardware. It is not hardware itself, even though it is more permanent than ordinary application software.