Which communication technology is used in contactless metro smart cards? MCQ with Answer and Explanation

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Which communication technology is used in contactless metro smart cards?

A. DVB

B. FTP

C. SMTP

D. RFID

Answer: Option D

Solution (By JKSSB Mock Tests)

RFID technology enables contactless fare collection through smart cards.

This question belongs to: Geography GK Transport and Communication

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Question #1

Which expressway connects Mumbai and Pune?

A. Delhi-Meerut Expressway

B. Mumbai-Pune Expressway

C. Agra-Lucknow Expressway

D. Eastern Expressway

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Correct Answer: Option B

Explanation:
Mumbai-Pune Expressway was India's first six-lane concrete high-speed expressway.

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Question #2

Which railway manufacturing unit is located at Chittaranjan?

A. DLW

B. ICF

C. RCF

D. CLW

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Correct Answer: Option D

Explanation:
Chittaranjan Locomotive Works (CLW) manufactures electric locomotives.

This question belongs to: Geography GK Transport and Communication

Question #3

Which communication technology is most commonly used for real-time global video calls?

A. Postal mail

B. Email

C. Telegraph

D. Internet-based VoIP

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Correct Answer: Option D

Explanation:
Voice over Internet Protocol (VoIP) enables real-time global voice and video communication over the internet.

This question belongs to: Geography GK Transport and Communication

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