Acme Ai
A
अ
GS Paper IUPSC Prelims 2023
Space & ISRO
Question No. 101Interactive Test Mode
00:00
+2-0.66

Q101. Which one of the following countries has its own Satellite Navigation System?

Which one of the following countries has its own Satellite Navigation System?

Select the correct option below (or cross out options to eliminate)
PrevNext Question

Official Answer Key & Detailed Solution

3D PYQ Realm

Ready to check the official UPSC Answer Key?

Click any option above to test yourself under exam conditions, or reveal the explanation directly.

Official UPSC Answer KeyUPSC Prelims 2023 • Science and Technology

Correct Answer: Option (D) — Japan

Concept & Option Breakdown

Standard Reference Verified

Japan has developed its own regional satellite navigation system known as the Quasi-Zenith Satellite System (QZSS), also nicknamed 'Michibiki'. It enhances GPS accuracy and provides positioning, navigation, and timing services across East Asia and Oceania.

Australia, Canada, and Israel rely on global systems like GPS/Galileo and do not operate independent satellite navigation constellations.

Elimination Heuristic & Exam Approach

Major independent regional satellite navigation constellations include NavIC (India) and QZSS (Japan), while global systems include GPS (USA), GLONASS (Russia), Galileo (EU), and BeiDou (China).

Reviewed by Avinash Sir & Acme AI Research Team

Practice Full-Length & Sectional Prelims Mocks on this Interface

50 simulated tests in the APT Prelims Test Series (₹1,493) or 1-on-1 Mentorship with Avinash Sir.

1-on-1 MentorshipOpen Test Platform

Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2023 (Q101)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Space & ISRO
Official Answer KeyOption (D) — Japan

Related & Repeated Prelims PYQs (2)

Questions from other UPSC Prelims years testing the same or closely linked concept.

View Cluster in 3D Graph
2007 • Q14181% Match

What is the Galileo Project which has been in the news recently?

Science and Technology • Space & ISROSolve
2009 • Q36780% Match

India has recently landed its Moon Impact Probe on the Moon. Among the following countries, which one landed such a probe on the Moon earlier?

General Knowledge (1995-2010) • MiscellaneousSolve

More PYQs from Science and Technology (Space & ISRO)

Master the Science and Technology syllabus cluster by practicing these related previous year questions.

View All Science and Technology PYQs
2024 • Q99Space & ISRO

Consider the following statements: Statement-I: Giant stars live much longer than dwarf stars. Statement-II: Compared to dwarf stars, giant stars have

Science and TechnologyPractice
2023 • Q100Space & ISRO

Consider the following pairs: | Objects in space | Description | | :--- | :--- | | 1. Cepheids | Giant clouds of dust and gas in space | | 2. Nebulae

Science and TechnologyPractice
2022 • Q102Space & ISRO

If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on the Earth? 1. GPS and navigation systems co

Science and TechnologyPractice
2021 • Q103Space & ISRO

Which one of the following is a reason why astronomical distances are measured in light-years?

Science and TechnologyPractice
2020 • Q104Space & ISRO

"The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometers lon

Science and TechnologyPractice
2019 • Q105Space & ISRO

Recently, scientists observed the merger of giant ‘blackholes’ billions of light years away from the Earth. What is the significance of this observati

Science and TechnologyPractice
2018 • Q106Space & ISRO

Consider the following statements: 1. Light is affected by gravity. 2. The Universe is constantly expanding. 3. Matter warps its surrounding space-tim

Science and TechnologyPractice
2018 • Q107Space & ISRO

With reference to India’s satellite launch vehicles, consider the following statements: 1. PSLVs launch the satellite useful for Earth resources monit

Science and TechnologyPractice

Frequently Asked Questions — UPSC Prelims 2023 Q101

What is the official answer for UPSC Prelims 2023 GS Paper I Question 101 (Science and Technology)?

The official UPSC answer key for this 2023 Science and Technology (Space & ISRO) question is Option (D): "Japan". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2023 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Space & ISRO". You can explore all repeated questions from Space & ISRO 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 Space & ISRO UPSC Prelims question using option elimination?

Major independent regional satellite navigation constellations include NavIC (India) and QZSS (Japan), while global systems include GPS (USA), GLONASS (Russia), Galileo (EU), and BeiDou (China).

Beyond Previous Year Questions

Structured Prelims Practice & Mentorship

Pair previous year question analysis with full-length simulated mock tests and 1-on-1 faculty guidance.

APT 2027 • 50 Prelims Tests17% OFF

Acme Prelims Test Series (APT)

Built to eliminate 1/3rd negative marking losses and 50–50 option traps through structured simulation and NCERT-backed keys.

  • 50 High-Yield Tests: Subject Sectionals, Current Affairs, CSAT Paper II & Full-Length Simulators
  • 1/3rd Penalty & Trap Analytics: Identify whether marks are lost to over-attempting or conceptual gaps
  • Option-by-Option NCERT Keys: Detailed distractor analysis and elimination logic for every question
  • Custom PDF-to-Mock Generator: Convert your revision notes or current affairs PDFs into practice tests
Complete 50-Test Package
₹1,493₹1,799• Valid till Prelims 2027
Explore APT Test SeriesTry Free Mock
1-on-1 Personal MentorshipCapped at 10 Seats

1-on-1 UPSC Mentorship with Avinash Sir

Weekly 1-on-1 strategy reviews, daily study accountability, and personalized MCQ attempt audits with an experienced UPSC mentor.

  • Weekly 1-on-1 Sessions: Direct mentorship with Avinash Sir (Former Plutus IAS Mentor, UPSC & UPPCS Mains Written)
  • APT 50-Test Series Included: Full Prelims GS1 & CSAT test series bundled at no additional cost
  • Mock Attempt & Elimination Audit: Question-by-question review to calibrate your risk and attempt accuracy
  • Prelims & Integrated Tracks: Available as dedicated Prelims mentorship or end-to-end Prelims + Mains guidance
Prelims & Integrated Tracks
17% OFF• Includes APT 50-Test Series
Explore 1-on-1 MentorshipCompare Tracks
Previous QuestionConsider the following pairs: | Objects in space | Description | | :--- | :--- | | 1. Cepheids | Giant clouds of dust and gas in space | | 2. Nebulae | Stars which brighten and dim periodically | | 3. Pulsars | Neutron stars that are formed when massive stars run out of fuel and collapse | How many of the above pairs are correctly matched?
Next QuestionWith reference to coal-based thermal power plants in India, consider the following statements: 1. None of them uses seawater. 2. None of them are set up in water-stressed districts. 3. None of them is privately owned. How many of the above statements are correct?