The invention of the common electronic memory system known as Dynamic Random-Access Memory (DRAM) was patented by whom? MCQ with Answer and Explanation

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The invention of the common electronic memory system known as Dynamic Random-Access Memory (DRAM) was patented by whom?

A. Fujio Masuoka

B. Jack Kilby

C. Robert Noyce

D. Robert H. Dennard

Answer: Option D

Solution (By JKSSB Mock Tests)

Dennard patented the single-transistor, single-capacitor memory cell layout at IBM in 1968, allowing exceptionally high-density memory storage.

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The discovery of the first pulsar (rotating neutron star) was achieved by which astrophysicist in 1967?

A. Fred Hoyle

B. Subrahmanyan Chandrasekhar

C. Jocelyn Bell Burnell

D. Antony Hewish

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Correct Answer: Option C

Explanation:
Jocelyn Bell Burnell discovered the first radio pulsars as a postgraduate student, although her advisor Antony Hewish received the Nobel Prize.

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Question #2

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The expanding nature of the universe was discovered by which astronomer?

A. Albert Einstein

B. Galileo Galilei

C. Johannes Kepler

D. Edwin Hubble

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Correct Answer: Option D

Explanation:
Edwin Hubble discovered in 1929 that galaxies are moving away from each other, indicating that the universe is expanding.

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Question #3

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The discovery of the mechanism of the greenhouse effect in the atmosphere is first attributed to which scientist?

A. John Tyndall

B. Svante Arrhenius

C. Guy Stewart Callendar

D. Joseph Fourier

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Correct Answer: Option D

Explanation:
Joseph Fourier recognized in 1824 that Earth's atmosphere acts like an insulator, warming the planet's surface.

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