Which is a contactless input technology? MCQ with Answer and Explanation

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Which is a contactless input technology?

A. Trackball

B. Mechanical switches

C. Membrane keyboard

D. RFID and NFC

Answer: Option D

Solution (By JKSSB Mock Tests)

Proximity reading.

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Question #1

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What does HDMI stand for?

A. Hybrid Display Monitor Input

B. High Density Memory Input

C. High Definition Multimedia Interface

D. High Data Multimedia Interface

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Correct Answer: Option C

Explanation:
HDMI is used for high-quality audio and video transmission.

This question belongs to: Computer Computer Hardware

Question #2

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What is the function of a GPU?

A. Scanning

B. Printing

C. Text input

D. Parallel processing for graphics and AI

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Correct Answer: Option D

Explanation:
Graphics Processing Unit excels in parallel tasks.

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Question #3

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What connects expansion cards to motherboard?

A. Wireless signals

B. Power supply

C. Slots like PCIe

D. Cables only

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Correct Answer: Option C

Explanation:
Expansion slots allow upgrades.

This question belongs to: Computer Computer Hardware

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