What is Blockchain primarily used for? MCQ with Answer and Explanation

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What is Blockchain primarily used for?

A. Weather forecasting

B. Secure transactions

C. Image editing

D. Rocket propulsion

Answer: Option B

Solution (By JKSSB Mock Tests)

Blockchain is a decentralized ledger technology.

This question belongs to: Static General Knowledge Science and Technology

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Question #1

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Which of the following is India's first anti-satellite missile test?

A. Mission Shakti

B. Agni-V

C. BrahMos

D. Prithvi

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Correct Answer: Option A

Explanation:
Mission Shakti was conducted in 2019.

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Question #2

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Which of these is a major contributor to ocean pollution?

A. Natural rainfall

B. Seaweed

C. Oxygen bubbles

D. Plastic waste

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Correct Answer: Option D

Explanation:
Plastic pollution has become a major environmental crisis in global oceans.

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Question #3

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Which part of the eye determines its color?

A. Pupil

B. Retina

C. Cornea

D. Iris

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Correct Answer: Option D

Explanation:
The iris is the colored part of the eye that controls pupil size.

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