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. Tim Berners-Lee

C. Alan Turing

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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Who discovered that the chemical element Cadmium is isolated as an impurity inside zinc carbonate mineral ores?

A. Friedrich Stromeyer

B. Carl Wilhelm Scheele

C. Jöns Jacob Berzelius

D. Martin Heinrich Klaproth

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Correct Answer: Option A

Explanation:
Stromeyer discovered cadmium in 1817 while inspecting pharmaceutical zinc oxide samples in Germany.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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The structure of DNA was discovered in 1953 by James Watson and Francis Crick with the crucial aid of data from whom?

A. Marie Curie

B. Rosalind Franklin

C. Dorothy Hodgkin

D. Barbara McClintock

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Correct Answer: Option B

Explanation:
Rosalind Franklin's X-ray diffraction images (particularly Photo 51) were key to identifying the double-helix structure of DNA.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

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Who discovered that biological chromosomes carry the unique hereditary factor tracking layouts, establishing Chromosome Theory?

A. Gregor Mendel

B. James Watson

C. Thomas Hunt Morgan

D. Walter Sutton and Theodor Boveri

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Correct Answer: Option D

Explanation:
Sutton and Boveri independently identified in 1902 that chromosome pairing and separation match Mendelian inheritance laws.

This question belongs to: Static General Knowledge Inventions and Discoveries

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