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GS Paper IUPSC Prelims 2018
Health & Medicine
Question No. 77Interactive Test Mode
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Q77. In which of the following areas can GPS technology be used? 1. Mobile phone operations 2. Banking operations 3. Controlling the power grids Select the correct answer using the code given below:

In which of the following areas can GPS technology be used?

  1. Mobile phone operations
  2. Banking operations
  3. Controlling the power grids 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 2018 • Science and Technology

Correct Answer: Option (D) — 1, 2 and 3

Concept & Option Breakdown

Standard Reference Verified

  1. Mobile phone operations: GPS receivers in mobile phones provide accurate positioning for mapping, location-based services, emergency location tracking, and network base-station synchronization.

  2. Banking operations: GPS satellites carry high-precision atomic clocks that provide microsecond-level Coordinated Universal Time (UTC) stamps, essential for synchronizing and auditing high-frequency financial transactions across distributed banking servers.

  3. Controlling the power grids: GPS-synchronized Phasor Measurement Units (PMUs) measure electrical waveforms at precise time intervals across the power grid, enabling real-time monitoring, fault detection, and wide-area control.

Elimination Heuristic & Exam Approach

GPS provides two fundamental outputs: precise location and hyper-accurate atomic time. Both banking networks and power grid PMUs rely heavily on GPS time-synchronization.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2018 (Q77)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — 1, 2 and 3

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Frequently Asked Questions — UPSC Prelims 2018 Q77

What is the official answer for UPSC Prelims 2018 GS Paper I Question 77 (Science and Technology)?

The official UPSC answer key for this 2018 Science and Technology (Health & Medicine) question is Option (D): "1, 2 and 3". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2018 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?

GPS provides two fundamental outputs: precise location and hyperaccurate atomic time. Both banking networks and power grid PMUs rely heavily on GPS timesynchronization.

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