India's first earth observation satellite was: MCQ with Answer and Explanation

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India's first earth observation satellite was:

A. IRS-1A

B. Bhaskara

C. RISAT-1

D. Cartosat-1

Answer: Option A

Solution (By JKSSB Mock Tests)

IRS-1A was launched in 1988.

This question belongs to: Static General Knowledge Science and Technology

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What is the main component of solar cells?

A. Aluminium

B. Iron

C. Copper

D. Silicon

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Correct Answer: Option D

Explanation:
Silicon is used in photovoltaic cells.

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Machine Learning is a subset of:

A. Nanotechnology

B. Blockchain

C. Artificial Intelligence

D. Quantum Computing

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Correct Answer: Option C

Explanation:
ML enables systems to learn from data without explicit programming.

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Which of these describes '3D Printing'?

A. Creating holograms with light

B. Additive manufacturing process to build 3D objects

C. Printing high-quality photos on paper

D. Designing complex blueprints on computers

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Correct Answer: Option B

Explanation:
3D printing is an additive manufacturing process that layers material to build a three-dimensional object.

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