All Free Computer Science and IT MCQs with Answers

191. In 1940, first electronic computer was invented by_______?

• A. Clifford Bery
• B. George Boole
• C. Atanasoff and Berry
• D. John V.Atanasoff

Explanation: The first electronic digital computer is generally credited to John Atanasoff and Clifford Berry, whose machine was the Atanasoff-Berry Computer. The option naming both inventors is therefore the best answer, despite the simplified date.

192. Computers that are used in large organizations such as insurance companies and banks, where many people frequently need to use same data, are____?

• A. mainframe computers
• B. super computers
• C. hybrid computers
• D. desktop computers

Explanation: Mainframe computers handle large volumes of data and support many simultaneous users, making them suitable for banks and insurance companies. Supercomputers focus primarily on highly complex calculations rather than routine multi-user business processing.

193. The word Computer used for the first time in____________?

• A. 1613
• B. 1614
• C. 1615
• D. 1616Windows OS

Explanation: The word computer was first used in 1613 by Richard Braithwaite for a person who performs calculations. It originally referred to a human calculator, not an electronic machine.

194. Who is the founder of IBM Company?

• A. Nolan Bushnell
• B. Steve Jobs
• C. Thomas J. Watson
• D. Bill Gates

Explanation: Thomas J. Watson Sr. is commonly identified in general computer MCQs as the founder or key builder of IBM. IBM technically developed from the Computing-Tabulating-Recording Company, so the wording simplifies its corporate history.

195. Which of the following types of memory improves processing by acting as a temporary high-speed holding area between the memory and the CPU?

• A. RAM
• B. ROM
• C. EPROM
• D. Cache memory
• E. Flash memory

Explanation: Cache memory is a small, very fast storage area between the CPU and main memory that keeps frequently needed data and instructions close to the processor. RAM is also temporary memory, but it is larger and slower than cache.

196. Which device is used to process data?

• A. CPU
• B. RAM
• C. DCU
• D. VDU

Explanation: The CPU processes instructions and data by performing calculations and controlling computer operations. RAM stores working data, while a VDU displays output and DCU is not the standard name for the main processing device.

197. Rearranging data in a new sequence is known as__________?

• A. Uploading
• B. Updating
• C. Sorting
• D. Summarizing

Explanation: Sorting rearranges records or data items into a chosen sequence, such as alphabetical or numerical order. Updating changes existing data, while summarizing condenses it.

198. Vector graphics is composed of_____________?

• A. Pixels
• B. Paths
• C. Palette
• D. None of above

Explanation: Vector graphics are defined by paths made from lines, curves, and mathematical coordinates, so they can be resized without losing quality. Pixels are the basic elements of raster graphics.

199. In which generation Computers vacuum tube were used?

• A. First generation
• B. Second generation
• C. Third generation
• D. Fourth generation

Explanation: First-generation computers used vacuum tubes for electronic switching and processing. Later generations replaced them with transistors, integrated circuits, and microprocessors.

200. The proper definition of a modern digital computer is____________?

• A. An electronic automated machine that can solve problems involving words and numbers
• B. A more sophistic and modified electronic pocket calculator
• C. Any machine that can perform mathematical operations
• D. A machine that works on binary code

Explanation: A digital computer is an electronic, programmable machine that processes words, numbers, and other data automatically according to instructions. Merely performing arithmetic or using binary code does not fully define a modern computer.