The first electronic programmable digital computer, ENIAC, was designed by whom? MCQ with Answer and Explanation

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The first electronic programmable digital computer, ENIAC, was designed by whom?

A. John von Neumann

B. Charles Babbage

C. Alan Turing

D. John Mauchly and J. Presper Eckert

Answer: Option D

Solution (By JKSSB Mock Tests)

ENIAC (Electronic Numerical Integrator and Computer) was constructed by Mauchly and Eckert at the University of Pennsylvania in 1945.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who invented the modern zipper mechanism with interlocking teeth in its final commercial form?

A. Elias Howe

B. Walter Hunt

C. Gideon Sundback

D. Whitcomb Judson

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Correct Answer: Option C

Explanation:
Gideon Sundback modified earlier primitive clasp locker designs into the modern 'Hookless Fastener' or zipper in 1913.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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The invention of the common mechanical office device known as the copy mimeograph machine was patented by whom?

A. Thomas Edison

B. Chester Carlson

C. Christopher Sholes

D. John Loud

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Correct Answer: Option A

Explanation:
Edison patented the stencil duplicating device in 1876, which Albert Dick later refined into the widespread commercial mimeograph.

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Question #3

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Who discovered the atomic element Radium alongside his wife Marie Skłodowska-Curie?

A. Henri Becquerel

B. Pierre Curie

C. Ernest Rutherford

D. J.J. Thomson

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Correct Answer: Option B

Explanation:
Pierre Curie collaborated deeply with Marie Curie to physically extract radium chloride from radioactive raw pitchblende matrices.

This question belongs to: Static General Knowledge Inventions and Discoveries

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