Who invented the mechanical cotton spinning machine known as the 'Spinning Jenny' in 1764? MCQ with Answer and Explanation

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Who invented the mechanical cotton spinning machine known as the 'Spinning Jenny' in 1764?

A. James Hargreaves

B. Richard Arkwright

C. Samuel Crompton

D. Eli Whitney

Answer: Option A

Solution (By JKSSB Mock Tests)

James Hargreaves invented the multi-spool spinning frame, significantly accelerating yarn production in early textile factories.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The invention of the common digital computer operating memory layout known as the Virtual Memory system was pioneered where?

A. IBM Laboratories

B. Xerox PARC

C. University of Manchester on the Atlas computer project

D. Stanford University

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Correct Answer: Option C

Explanation:
The Atlas computing development team implemented structural hardware address translation systems in 1959 to pool core and drum memories.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered that certain types of mold produce enzymes that slice viral genetic strains, known as CRISPR-Cas9 genome editing?

A. Alec Jeffreys

B. Kary Mullis

C. James Watson

D. Emmanuelle Charpentier and Jennifer Doudna

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Correct Answer: Option D

Explanation:
Charpentier and Doudna adapted the bacterial immune mechanism into an exceptionally precise genetic engineering tool, winning the 2020 Nobel Prize.

This question belongs to: Static General Knowledge Inventions and Discoveries