RFID tags are read using: MCQ with Answer and Explanation

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RFID tags are read using:

A. Optical scanners

B. Radio frequency input devices

C. Magnetic readers

D. Thermal sensors

Answer: Option B

Solution (By JKSSB Mock Tests)

Contactless identification.

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Question #1

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The PCIe lanes are used for:

A. Audio

B. Power only

C. High bandwidth connections to GPU and SSDs

D. Low speed peripherals

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Correct Answer: Option C

Explanation:
Scalable high-speed interface.

This question belongs to: Computer Computer Hardware

Question #2

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What is the typical power consumption of an idle modern monitor?

A. 1000W

B. 500W

C. Negligible only

D. Low, around 20-50W

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Correct Answer: Option D

Explanation:
Energy efficient designs.

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Question #3

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What is the function of a voltage regulator in PSU?

A. Stable output voltages

B. Store energy

C. Cool air

D. Increase power

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Correct Answer: Option A

Explanation:
Protects components.

This question belongs to: Computer Computer Hardware

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