Who invented the first practical electronic calculator utilizing a microprocessor chip? MCQ with Answer and Explanation

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Who invented the first practical electronic calculator utilizing a microprocessor chip?

A. Busicom team and Intel (Masatoshi Shima, Ted Hoff)

B. John von Neumann

C. Charles Babbage

D. Alan Turing

Answer: Option A

Solution (By JKSSB Mock Tests)

The partnership between Busicom and Intel led to the invention of the Intel 4004, the first commercial programmable microprocessor.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the fundamental principle of chemical thermodynamics relating free energy, enthalpy, and entropy?

A. Sadi Carnot

B. James Joule

C. Lord Kelvin

D. Josiah Willard Gibbs

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Correct Answer: Option D

Explanation:
Josiah Willard Gibbs formulated Gibbs Free Energy ($G = H - TS$), establishing mathematical precision within physical chemistry.

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Question #2

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The invention of the common maritime signaling system known as the heliograph was optimized by whom?

A. Benjamin Franklin

B. Sir Henry Christopher Mance

C. Alexander Graham Bell

D. Guglielmo Marconi

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Correct Answer: Option B

Explanation:
Mance engineered the specialized flash mirror signaling device in the 1870s for military communications across arid frontier terrain.

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Question #3

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The invention of the common computing tracking protocol known as the Ethernet local network architecture was co-developed by whom?

A. Douglas Engelbart

B. Tim Berners-Lee

C. Robert Metcalfe

D. Vint Cerf

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Correct Answer: Option C

Explanation:
Robert Metcalfe co-invented Ethernet at Xerox PARC in 1973, linking internal computer terminals across localized hardware networks.

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