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GS Paper IUPSC Prelims 2016
Health & Medicine
Question No. 81Interactive Test Mode
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Q81. With reference to ‘LiFi’, recently in the news, which of the following statements is/are correct? 1. It uses light as the medium for high-speed data transmission. 2. It is a wireless technology and is several times faster than ‘WiFi’. Select the correct answer using the code given below.

With reference to ‘LiFi’, recently in the news, which of the following statements is/are correct?

  1. It uses light as the medium for high-speed data transmission.
  2. It is a wireless technology and is several times faster than ‘WiFi’. Select the correct answer using the code given below.
Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2016 • Science and Technology

Correct Answer: Option (C) — Both 1 and 2

Concept & Option Breakdown

Standard Reference Verified

Statement 1 is correct: Light Fidelity (LiFi) is a Visible Light Communications (VLC) system that transmits high-speed data using visible light, ultraviolet, or infrared spectrum via LED bulbs. Statement 2 is correct: LiFi is a bidirectional, high-speed, fully networked wireless communication technology that has achieved experimental speeds exceeding 100 Gbps, significantly faster than conventional Wi-Fi.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2016 (Q81)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (C) — (c) Both 1 and 2

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Frequently Asked Questions — UPSC Prelims 2016 Q81

What is the official answer for UPSC Prelims 2016 GS Paper I Question 81 (Science and Technology)?

The official UPSC answer key for this 2016 Science and Technology (Health & Medicine) question is Option (C): "(c) Both 1 and 2". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2016 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Health & Medicine UPSC Prelims question using option elimination?

To solve Health & Medicine questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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