Who invented the multi-matrix code known as the QR (Quick Response) Code in 1994? MCQ with Answer and Explanation

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Who invented the multi-matrix code known as the QR (Quick Response) Code in 1994?

A. Masahiro Hara

B. Alan Turing

C. Tim Berners-Lee

D. Norman Joseph Woodland

Answer: Option A

Solution (By JKSSB Mock Tests)

Masahiro Hara from the Japanese company Denso Wave invented the QR code in 1994 to track automobile components during assembly.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered that elements display unique crystalline patterns when rapidly frozen from molten metal matrices, founding physical Metallurgy?

A. Henry Bessemer

B. Antoine Lavoisier

C. Dmitri Mendeleev

D. Henry Clifton Sorby

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Correct Answer: Option D

Explanation:
Sorby applied microscopic analysis to polished iron and steel samples, establishing microstructure phase boundaries.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who is credited with the invention of the submarine 'Turtle', used in military action?

A. Robert Fulton

B. John Philip Holland

C. Cornelis Drebbel

D. David Bushnell

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Correct Answer: Option D

Explanation:
David Bushnell invented the Turtle in 1775, the first submarine ever used in combat.

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Question #3

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Who discovered that gases diffuse at specific rates relative to temperature variations, formalizing the Charles's Law?

A. Robert Boyle

B. Jacques Charles and Joseph Louis Gay-Lussac

C. John Dalton

D. Amadeo Avogadro

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Correct Answer: Option B

Explanation:
Jacques Charles collected gas expansion data in the 1780s, which Gay-Lussac later published as a direct linear volume-temperature relation.

This question belongs to: Static General Knowledge Inventions and Discoveries

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