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18 topicsGS-1: 4GS-2: 3GS-3: 11
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GS-3Economy

1.India Data Centre Expansion Prospects (Data Centre Industry)

LiveMint
Illustration for India Data Centre Expansion Prospects (Data Centre Industry)

What & Where

Definition: Purpose-built facilities housing servers, storage, networking, power backup and cooling to manage massive digital data

Key elements: UPS + generators, HVAC/liquid cooling, routers/switches, cyber-physical security, scalable racks for cloud/AI workloads

Core geography: >50 % capacity in Mumbai; rising clusters Ahmedabad–Pune–Vizag; roughly 150 centres across India

Quick Facts for MCQs

Growth Drivers

  • Digitalisation: mobile internet surge, cloud adoption, AI workloads demanding proximate processing
  • 5G & IoT: expected to triple data consumption hence edge-heavy infrastructure
  • Data-local laws: Public Records Act 1993 and DPDP Act 2023 boosting domestic storage need

Economic Angle

  • Capacity doubling by FY27 could unlock ₹50,000 crore economic activity
  • Sector fuels jobs across construction, power, cooling, cybersecurity
  • Attracts FDI from AWS, Microsoft, Google, CtrlS, Sify, Yotta

Challenges

  • Infrastructure: patchy power, high land & cooling capex outside metros
  • Skills: shortage of specialised engineers in operations, sustainability, security
  • Competition: China’s larger, cheaper hyperscale parks lure global workloads

Policy & Schemes

  • Digital India 2015 expanded broadband backbone supporting data-centre demand
  • States like Maharashtra 2023 IT/ITES Policy offer stamp-duty, power-tariff incentives
  • NIC operates National Data Centres for e-governance workloads

Environmental Impact

  • Energy intensity raises carbon footprint; renewables adoption critical
  • Efficient HVAC, liquid cooling and heat-reuse gaining investor preference
  • Regulatory push for green power purchase agreements in upcoming parks

Key Data Points

FeatureData-Point
Market size FY23USD 4.5 billion
Projected size 2032USD 11.6 billion
CAGR 2023-3210.98 %
India share global data20 % produced vs 3 % capacity
Internet users 2024751.5 million (52.4 % penetration)
RBI data-local rule2018 mandate for payment data storage in India
Infra status threshold>5 MW IT load gets infrastructure tag
Estimated capex FY25-27₹55,000–65,000 crore
First hyperscaleYotta D1, Greater Noida, UP
Key metro shareMumbai hosts >50 % capacity

Related UPSC Prelims PYQs

GS1 2019PYQ 1

Consider the following statements:

GS-3EconomyQuick Bite

2.Index of Eight Core Industries Update (Core Industries Index)

PIB

What & Where

Index of Eight Core Industries (ICI) tracks output of 8 key sectors within India’s industrial economy

Released monthly by Office of Economic Adviser, Ministry of Commerce & Industry

ICI influences overall Index of Industrial Production (IIP) due to 40.27 % combined weight

Quick Facts for MCQs

Composition & Weights

  • Constituents: Coal, Crude Oil, Natural Gas, Refinery Products, Fertilizers, Steel, Cement, Electricity
  • Weight ranking: Refinery Products > Electricity > Steel > Coal > Crude Oil > Natural Gas > Cement > Fertilizers
  • Weight shares fixed using 2011-12 IIP series

Institutional Setup

  • Compilation: Office of Economic Adviser prepares ICI; Central Statistical Office compiles IIP
  • Both indices part of National Statistical System ensuring monthly industrial monitoring
  • Ministries & PSUs supply sector-wise production data to OEA/CSO

Economic Angle

  • Positive 4.3 % core growth signals underlying industrial momentum before full IIP release
  • High weights make energy-related sectors critical for aggregate industrial cycles
  • Policymakers track ICI for quick infra & demand assessment prior to GDP estimates

Key Data Points

FeatureData-Point
YoY growth, Nov 20244.3 %
Combined ICI weight in IIP40.27 %
Publishing authorityOffice of Economic Adviser
Parent ministryCommerce & Industry
Release frequencyMonthly
Base year, IIP2011-12
Data lag, IIP6 weeks
Largest-weight core industryRefinery Products – 28.04 %
Next two weightsElectricity 19.85 %; Steel 17.92 %
Lowest-weight core industryFertilizers 2.63 %

Related UPSC Prelims PYQs

GS1 2012PYQ 1

In India, in the overall Index of Industrial Production, the Indices of Eight Core Industries have a combined weight of 37·90%. Which of the following are among those Eight Core Industries?

GS1 2015PYQ 2

In the ‘Index of Eight Core Industries’, which one of the following is given the highest weight?

GS-1History

3.Leader Memorial Practices in India (Leader Memorial Traditions)

The Hindu

What & Where

Memorial samadhis: post-cremation sites for top leaders, clustered on Yamuna riverfront, Delhi.

Custom started with Raj Ghat (Gandhi, 1948); no legal compulsion for later Prime Ministers.

2025 break: Manmohan Singh cremated at public Nigambodh Ghat; no separate memorial announced.

Quick Facts for MCQs

Tradition & Symbols

  • Naming conveys ideals: Vijay Ghat (victory), Shakti Sthal (strength), Kisan Ghat (farmer leadership).
  • Samadhis serve as public memory spaces reinforcing national unity narratives.
  • Open public access generally maintained, unlike restricted VIP enclosures.

Political Angle

  • Memorial decisions often politicised; Rao’s Gyan Bhumi cleared by NDA after Congress hesitation.
  • V. P. Singh’s absence shows discretionary, party-linked nature of recognitions.
  • Choice of open cremation for Manmohan Singh signals shift from personality cults.

Governance & Maintenance

  • No statutory mandate; Cabinet Secretariat issues funeral protocol only.
  • Land/allocation under Delhi Development Authority; maintenance via Delhi Govt & NDMC, occasional Central grants.
  • Costs, landscaping, security borne by respective state/local bodies.

Geographical Spread

  • Outside-Delhi samadhis: Rajendra Prasad (Patna), B. R. Ambedkar (Mumbai), Morarji Desai & Gulzarilal Nanda (Ahmedabad).
  • Highlights decentralised remembrance beyond capital-centric model.
  • Regional pride influences memorial siting and funding.

Key Data Points

FeatureData-Point
Precedent memorialRaj Ghat (Mahatma Gandhi)
Nehru samadhiShanti Van
Shastri samadhiVijay Ghat
Indira Gandhi samadhiShakti Sthal
Atal Bihari Vajpayee samadhiSmriti Sthal
Charan Singh samadhiKisan Ghat
Only ex-PM without memorialV. P. Singh
P. V. Narasimha Rao memorialGyan Bhumi, built by NDA
2025 cremation siteNigambodh Ghat, Delhi
Primary upkeep agenciesState govts/municipalities; MoUD support
GS-1S&T

4.India Meteorological Department Functions (Meteorological Agency)

The Hindu

What & Where

National weather service of India under Ministry of Earth Sciences; HQ New Delhi.

Operates nationwide weather observation, forecasting, climate research for land and adjoining seas.

Created 1875 after 1864 Calcutta cyclone and monsoon failures of 1866 & 1871.

Quick Facts for MCQs

History & Evolution

  • Origins: scattered provincial observatories consolidated into central authority in 1875.
  • Timeline: eighteenth-century setups → 1793 Madras Observatory → national IMD.
  • Continuity: nearly 150 years of uninterrupted weather services.

Core Functions

  • Weather-forecasting: short, medium, long-range outlooks supporting farming and disaster management.
  • Cyclone-warning: dedicated division issues track, intensity, landfall alerts.
  • Sectoral-services: supplies customised data to aviation, marine, fisheries, hydrology.

Infrastructure & Network

  • Network: regional/state centres, upper-air sites, Doppler radars, satellites, >700 surface stations.
  • Data-collection: real-time temperature, pressure, wind, rainfall across diverse terrains.
  • Technology: numerical weather prediction models improve spatial–temporal accuracy.

Climate Research

  • Focus: monsoon variability, extreme events, climate-change impacts on India.
  • Outputs: annual Climate Summary, peer-reviewed studies guiding adaptation policy.
  • Collaboration: partners with national institutes & WMO for datasets, capacity building.

Key Data Points

FeatureData-Point
Parent ministryMinistry of Earth Sciences
Establishment year1875
HeadquartersNew Delhi
Historical triggers1864 Calcutta cyclone; monsoon failures 1866 & 1871
Earliest observatoryMadras Observatory 1793
Field observatories700 +
Key warning focusCyclones over Indian Ocean
Major user sectorsAgriculture, aviation, shipping, fisheries, floods

Related UPSC Prelims PYQs

NDA_GAT 2020PYQ 1

Which one of the following is the oldest scientific department of Government of India?

NDA_GAT 2025PYQ 2

Which one of the following organisations has completed 150 years of service to the nation in the year 2025?

GS-1Mapping

5.Saraswati River Course and Legacy (Ancient River)

Times of India
Illustration for Saraswati River Course and Legacy (Ancient River)

What & Where

Saraswati; ancient, now-vanished Himalayan river, culturally venerated, debated paleo-channel across northwest India.

Possible present course; Ghaggar-Hakra system from Shivalik Hills through Punjab-Haryana-Rajasthan, ending in Thar Desert.

Recent Jaisalmer tube-well water-gas eruption revives hypothesis of subterranean Saraswati flow under Thar.

Quick Facts for MCQs

Historical Significance

  • Rigvedic texts extol Saraswati as “perfect mother” goddess central to Vedic rituals.
  • Archaeology finds ~2/3 Harappan sites along presumed Saraswati paleo-channel.
  • River decline posited as trigger for Harappan eastward migration.

Geological Aspects

  • Tectonic shifts and aridity cited for channel abandonment post-2000 BCE.
  • Groundwater-gas upsurge in Thar hints at trapped palaeofluvial aquifers.
  • Remote sensing traces buried channels aligning with Ghaggar-Hakra course.

River System Linkages

  • Ghaggar becomes Hakra downstream Ottu barrage, indicating man-made interruption.
  • Seasonal flows suggest lost glacial feeders formerly from Sutlej & Yamuna deflection.
  • Proposed interlinking projects aim to rejuvenate Ghaggar-Saraswati channel for irrigation.

Key Data Points

FeatureData-Point
Mythic mentionRigveda Nadistuti Sukta
Civilisation linkedHarappan settlements densely along banks
Original sourceKapal Tirith, Himalayas near Kailash
Early southward flowTowards Lake Mansarovar
Alternate nameGuptagamini (hidden course)
Modern remnantGhaggar-Hakra River
Ghaggar originShivalik Hills, Himachal Pradesh
Transiting statesHaryana, Rajasthan, Gujarat
Hakra end-pointDries in Thar Desert after Ottu barrage
Recent field eventWater-methane burst during tube-well drilling, Jaisalmer

Related UPSC Prelims PYQs

CDS_GK, GS1 1996PYQ 1

The river most mentioned in early Vedic literature is

CDS_GK, GS1 2022PYQ 2

प्राचीन वैदिक काल में निम्नलिखित में से किस नदी के तट पर दस राज युद्ध हुआ था ?

GS-3Environment

6.Waste Incineration Process and Benefits (Waste Disposal)

The Hindu
Illustration for Waste Incineration Process and Benefits (Waste Disposal)

What & Where

Incineration = controlled high-temperature combustion to shrink volume, destroy toxins, recover energy

337 t chemical waste from 1984 Bhopal disaster being trucked to Pithampur, Madhya Pradesh

Complete burn planned inside 3–9 months at Common Hazardous Waste Incinerator

Quick Facts for MCQs

Tech & Process

  • Combustion: waste oxidised above 850 °C for toxin destruction
  • Energy-recovery: heat → steam → turbine electricity
  • Residue-handling: bottom ash reused/landfilled; fly ash chemically stabilised

Advantages

  • Volume-reduction: landfill demand curtailed in dense zones
  • Hazard-neutralization: dioxins precursors destroyed when plant maintained properly
  • Resource-recovery: by-products converted to paving bricks, activated carbon

Limitations & Risks

  • Emission-threat: dioxins, furans if combustion incomplete
  • Cost-intensity: advanced plants need high capital, O&M outlays
  • Moisture-penalty: Indian wet waste lowers calorific efficiency

Key Data Points

FeatureData-Point
Waste quantity337 tonnes
Origin siteBhopal gas tragedy (1984)
Disposal sitePithampur industrial area, MP
Furnace temperature> 850 °C
Planned timeframe3–9 months
Energy outputSteam-driven electricity generation
Emission controlsScrubbers, bag-house filters

Related UPSC Prelims PYQs

ESE_GS 2020PYQ 1

Which one of the following is a hygienic way of disposing solid waste and is more suitable if the waste contains more hazardous material and organic content?

GS-3Environment

7.Global Environment Summits 2024 (Climate Summits 2024)

The Hindu
Illustration for Global Environment Summits 2024 (Climate Summits 2024)

What & Where

2024 UN environment summits tackled biodiversity, climate, land degradation, plastic pollution under Rio-Convention/INC tracks.

Hosted across Colombia, Azerbaijan, Saudi Arabia, South Korea; sought finance, fossil exit, drought protocol, plastic treaty.

None produced binding, adequately funded agreements, exposing North-South divides and implementation gaps.

Quick Facts for MCQs

2024 Summit Outcomes

  • Biodiversity: Financing mechanism unfinished; $700 bn gap persists.
  • UNFCCC: Insufficient pledges, fossil phase-out language contested.
  • UNCCD & INC: Drought protocol, plastics reduction language blocked.

Failure Drivers

  • Divergent-Priorities: Developing states seek finance/tech; developed cite domestic constraints.
  • Economic-Pressures: Inflation, wars, post-COVID recovery diverted budgets.
  • Accountability-Deficit: No agreed tracking or enforcement frameworks.

Youth Climate Advocacy

  • Litigation: Cases in US, Netherlands, Germany, Canada compel stronger targets.
  • Rights-Based: Argue climate inaction violates life, health, equality, intergenerational equity.
  • Momentum: Court wins amplify youth role in negotiations and media.

Forward Actions

  • Finance-Honour: Developed nations must deliver promised climate, biodiversity, adaptation funds.
  • Integrated-Approach: Tackle biodiversity loss, land, pollution alongside emission cuts with measurable milestones.

Key Data Points

FeatureData-Point
Biodiversity finance targetUS $700 billion annually
Biodiversity summit venueColombia
Climate COP-29 hostAzerbaijan
Key COP-29 clashFossil-fuel transition wording & finance
UNCCD COP-16 hostSaudi Arabia
Drought protocol statusNo legal consensus
Plastic INC round venueSouth Korea
Plastic debate fault-lineReduction v/s recycling economies
Landmark US youth caseHeld v. Montana
German climate verdict year2021 Federal-Court youth win

Related UPSC Prelims PYQs

GEO_GS, GS1 2026PYQ 1

The United Nations Framework Convention on Climate Change (UNFCCC) was first signed during

GEO_GS, GS1 2018PYQ 2

The Partnership for Action on Green Economy (PAGE), a UN mechanism to assist countries' transition towards greener and more inclusive economies, emerged at

GS-3Environment

8.CGWB Groundwater Contamination 2023 Findings (Groundwater Nitrate Pollution)

The Hindu
Illustration for CGWB Groundwater Contamination 2023 Findings (Groundwater Nitrate Pollution)

What & Where

Groundwater nitrate contamination >45 mg/L flagged by CGWB 2023, indicating rising chemical pollution of aquifers

Process involves leaching of nitrogenous fertilizers, septic effluents and runoff, with concentrations peaking post-monsoon

Geography spans 440 districts; hotspots include Rajasthan, Karnataka, Tamil Nadu, and spreading across central-southern India

Quick Facts for MCQs

Health Impact

  • Methemoglobinemia: high nitrate causes blue baby syndrome in infants
  • Fluorosis: chronic fluoride ingestion deforms bones and teeth
  • Treatment: contamination elevates community water-treatment costs

Regional Trends

  • Expansion: 81 new districts joined contamination list since 2017
  • Seasonality: monsoon runoff pushes nitrate exceedance to 32.66 % samples
  • Quantity-quality paradox: 73 % blocks safe for volume yet quality deteriorates

Sources

  • Agriculture: excess urea, pesticides seep into aquifers
  • Waste: leaking septic tanks, landfills, hazardous sites introduce chemicals
  • Deforestation: reduced soil filtration intensifies pollutant recharge

Schemes & Initiatives

  • NAQUIM: nationwide aquifer mapping and recharge planning
  • ABHY: ₹6000 cr participatory groundwater management in seven states
  • Jal Shakti Abhiyan Catch the Rain drives rooftop harvesting and recharge pits

Key Data Points

FeatureData-Point
Districts above safe nitrate 2017359
Districts above safe nitrate 2023440
Share of Indian districts unsafe56 %
Safe limit nitrate (BIS)45 mg L⁻¹
Highest state shareRajasthan 49 %
Post-monsoon samples exceeding32.66 %
National groundwater extraction60.4 % of availability
Blocks in safe category 202373 %
Fluoride hotspot statesRJ, HR, KA, AP, TS
Uranium exceedance zonesOver-exploited areas of RJ, PB, HR, GJ, TN, AP, KA

Related UPSC Prelims PYQs

ESE_GS, GS1 2025PYQ 1

Nitrate when present in excess in drinking water causes

ESE_GS, GS1 2020PYQ 2

Consider the following statements:

GS-3Environment

9.India Renewable Energy Expansion Strategy (Renewable Energy Targets)

LiveMint

What & Where

Renewable energy: power from replenishable natural flows; solar, wind, hydro, biomass, geothermal, tidal

Key processes: sunlight-photovoltaic/thermal, wind-turbine, water-turbine, biomass-cogeneration

Core Indian belts: Solar-Rajasthan / Gujarat / Tamil Nadu; Onshore wind-Tamil Nadu / Gujarat / Karnataka; Offshore prospects-Gujarat coast

Quick Facts for MCQs

Capacity & Potential

  • Solar leadership 94 GW; wind second 48 GW; plan to double wind to 100 GW
  • Solar potential 748 GW with 3 % wasteland; wind potential >300 GW including offshore margins
  • Hydro potential 148 GW total; small hydro 20 GW Himalayan and Northeast

Challenges

  • Land scarcity; fragmented ownership Gujarat / Maharashtra / Tamil Nadu complicates aggregation
  • Grid curtailment during peak wind seasons; supply variability hampers revenues
  • Capital intensive projects with long payback; policy inconsistencies deter private investment

Schemes & Policy Tools

  • Flagship programmes PM-KUSUM, Suryodaya, Solar Parks, Green Energy Corridor, PLI for modules
  • 100 % FDI automatic route in renewables attracts capital
  • National Green Hydrogen Mission and Bioenergy Programme expand downstream demand

Way Forward

  • Transparent digital land banks; promote agrivoltaics dual use
  • Accelerate transmission, hybrid projects and storage for smooth dispatch
  • Pilot offshore wind with fiscal incentives; create green banks for affordable finance

Key Data Points

FeatureData-Point
Total RE installed (Nov 2024)158.55 GW
Solar installed94.17 GW
Wind installed47.96 GW
Wind addition FY 24-252.07 GW
Small hydro installed5.08 GW
Biomass installed10.72 GW
Waste-to-Energy installed0.61 GW
2030 non-fossil target500 GW
Estimated solar potential748 GW
Estimated onshore + offshore wind potential>300 GW

Related UPSC Prelims PYQs

GEO_GS, GS1 2026PYQ 1

India's installed solar capacity in 2025 is close to

GEO_GS, GS1 2022PYQ 2

निम्नलिखित कथनों पर विचार कीजिए :

GS-3S&T

10.Vikram Sarabhai Contributions to Indian Space (Space Pioneer)

Indian Express
Illustration for Vikram Sarabhai Contributions to Indian Space (Space Pioneer)

What & Where

Pioneer; launched modern Indian space & nuclear research; death anniversary marked every 30 December

Core geography: Ahmedabad upbringing & labs; principal centres at PRL-Ahmedabad, VSSC-Thiruvananthapuram

Key processes: cosmic-ray studies, satellite applications for education, institution-building for self-reliant S&T

Quick Facts for MCQs

Early Life & Education

  • Mentored by CV Raman at IISc during WWII return
  • Built working train-engine model at 15, displayed at Ahmedabad CSC
  • Completed Natural Sciences Tripos, St John’s College Cambridge 1940

Institution Building

  • Founded PRL, VSSC, Space Applications Centre, Community Science Centre, Darpan Academy
  • Catalysed establishment of IIM-Ahmedabad; promoted modern management education
  • Led creation of ECIL Hyderabad & UCIL Jaduguda for electronics & uranium supply

Space & Nuclear Programmes

  • Laid organisational groundwork for ISRO post-INCOSPAR era
  • Championed SITE beaming lessons to 2,400 rural villages; precedent for Krishi Darshan
  • Chaired Atomic Energy Commission after Homi Bhabha, integrated peaceful nuclear research

Awards & Positions

  • Won Shanti Swarup Bhatnagar Award 1962; youngest recipient then
  • Presided Physics Section, Indian Science Congress 1962; IAEA General Conference Vienna 1970
  • Vice-President, 4th UN Conference on Peaceful Uses of Atomic Energy 1971

Key Data Points

FeatureData-Point
Birth12 Aug 1919, Ahmedabad
PhD topicCosmic rays, Cambridge 1947
First lab foundedPhysical Research Laboratory, 1947
ISRO ethos“Space technology for societal good”
SITE years1975-76 pilot with NASA
First Indian satelliteAryabhata, launched 1975 (conceptualised by him)
Key management schoolCo-founded IIM-Ahmedabad
Major PSU rolesSet up ECIL & UCIL
Top civilian honoursPadma Bhushan 1966; Padma Vibhushan 1972 (posthumous)
Nickname by A P J Kalam“Mahatma Gandhi of Indian Science”
Lunar tributeSarabhai crater on Moon
GS-3S&T

11.World Malaria Report 2024 India Progress (Malaria Elimination)

PIB

What & Where

Disease; Plasmodium infection spread by female Anopheles mosquitoes

Species; Five human parasites, P. falciparum & P. vivax most dangerous

Geography; Tropical–sub-tropical belt, WHO-African Region holds 94 % 2023 cases

Quick Facts for MCQs

Global Burden

  • Numbers; 263 m cases, 5.97 lakh deaths 2023, deaths down from 6.22 lakh 2020
  • Concentration; Nigeria, DR Congo, Uganda, Ethiopia, Mozambique give ~52 % cases
  • Certification; Nine countries malaria-free since 2015, Egypt joined 2024

India Trend

  • Decline; 80 % case & 78 % death reduction 2015-23
  • Burden shift; High-burden states now Mizoram & Tripura; Ladakh, Lakshadweep, Puducherry at zero
  • Surveillance; ABER climbed to 11.62 enabling earlier diagnosis

Policy & Schemes

  • Framework; National Malaria Elimination 2016-30 fixes 2027 & 2030 milestones
  • Programs; NVBDCP, NMCP 1953, HBHI 2019 deploy IRS, LLINs, surveillance, treatment
  • Research; MERA-India under ICMR drives multi-partner studies

Vaccines

  • Products; RTS,S/AS01 & R21/Matrix-M rolled out in endemic zones
  • Mechanism; Target pre-erythrocytic P. falciparum stage, boost antibodies
  • Relevance; Complement nets, spraying, chemoprevention towards elimination goal

Key Data Points

FeatureData-Point
ReportWorld Malaria Report 2024
Global cases 2023263 million
Global deaths 20235,97,000
Africa share 202394 % cases / 95 % deaths
Biggest-burden countryNigeria 26 % global cases
Nations certified malaria-free 2015-249 (latest Egypt 2024)
India cases 2015 → 202311.7 lakh → 2.3 lakh
India deaths 202383
India exited HBHI group2024
Annual Blood Examination Rate 202311.62
Elimination targetsZero indigenous 2027; malaria-free 2030
WHO-approved vaccinesRTS,S / AS01 & R21 / Matrix-M

Related UPSC Prelims PYQs

CDS_GK, NDA_GAT 2021PYQ 1

Which one of the following countries has recently been awarded a malaria-free certification by the WHO?

CDS_GK, NDA_GAT 2019PYQ 2

Malaria is a widespread disease.

GS-3S&TQuick Bite

12.Birth of Commercial Internet 1983 (TCP/IP Adoption)

The Telegraph

What & Where

Event 1 Jan 1983: ARPANET shifts from NCP to TCP/IP, marking modern Internet’s birth

Network ARPANET: first public packet-switched system, Cold War project of US Defence

Geography USA-led innovation, later enabling worldwide inter-networking

Quick Facts for MCQs

Tech & Schemes

  • TCP/IP stack enables scalable, interoperable data exchange across heterogeneous networks
  • Shift created first true “network of networks,” basis for Web, email, e-commerce
  • Adoption mandatory for every ARPANET node on Flag Day

Security Dimension

  • Cold War context drove resilient, decentralised architecture to withstand nuclear strike disruptions
  • Packet switching and TCP/IP routing avoid single points of failure
  • Defence-origin technology later civilian-dominated

Innovation History

  • ARPANET 1969 launch, but NCP limitations surfaced by late 1970s
  • TCP/IP proposal issued 1974, field-tested mid-1970s on multiple networks
  • Transition success credited as seminal milestone in global communication evolution

Key Data Points

FeatureData-Point
Flag Day1 January 1983
Old protocolNetwork Control Protocol (NCP)
New protocolTransmission Control Protocol/Internet Protocol (TCP/IP)
Key developersVinton Cerf & Robert Kahn
Parent projectARPANET
Initiating bodyUS Department of Defense
Primary ARPANET aimCommunication survival during nuclear attacks
Network typePublic packet-switched computer network

Related UPSC Prelims PYQs

CDS_GK 2023PYQ 1

Which one of the following pairs of events and years is not correctly matched ?

GS-2Misc

13.Moldova Transnistria Gas Supply Crisis (Moldova-Transnistria Conflict)

BBC

What & Where

Ukraine halted Russian gas transit (Jan 2025) ending pre-war 2020-24 route to EU.

Moldova, landlocked between Romania (W) & Ukraine (E), faces winter energy crunch.

Transnistria, Russian-backed strip along Dniester River, de-facto separate from Moldova since 1992.

Quick Facts for MCQs

Energy & Transit

  • Disruption; EU loses one of last Russian pipeline corridors outside TurkStream & Nord Stream.
  • Moldova’s power plants depend ~100 % on Gazprom gas; winter heating jeopardised.
  • Alternative supply; Romania’s Interconnector Iasi-Ungheni offers limited back-flow capacity.

India Dimension

  • Embassy; Moldova’s first resident mission in South Asia targets trade, IT, pharma partnerships.
  • Bilateral; India extends e-Visa, supports agriculture R&D with Moldovan institutes.

Security & Geopolitics

  • Russian peacekeepers; ~1,500 troops guarantee Transnistrian autonomy, complicating EU integration talks.
  • Kyiv’s cutoff heightens Moscow–Chişinău tensions; potential pretext for increased Russian leverage.

Sovereignty & Recognition

  • No UN member recognises Transnistria; even Russia maintains de jure Moldovan borders.
  • 1992 cease-fire accord under OSCE oversight still frames negotiation format “5+2”.

Key Data Points

FeatureData-Point
Transit deal expiry31 Dec 2024
Cut routeRussia → EU via Ukraine
Crisis-hit areasMoldova, Transnistria
Moldova neighboursRomania (west), Ukraine (east)
Moldova embassy in IndiaOpened 2024, New Delhi
Indo-Moldova tiesFormal since 1992
Transnistria statusUnrecognised; viewed internationally as Moldova
Russian troops presentYes, since 1990s
Dominant citizenship in TransnistriaDual/triple (Russia, Transnistria, Moldova)
Descriptor of Transnistria“Remnant of the Soviet Union”
GS-2Misc

14.Quad Cooperation 20th Anniversary Highlights (Quad Strategic Dialogue)

Indian Express
Illustration for Quad Cooperation 20th Anniversary Highlights (Quad Strategic Dialogue)

What & Where

Quad; strategic forum of US-India-Japan-Australia for Indo-Pacific security

Aim; free, open, rule-based maritime order countering China’s assertiveness

Geography; Indian & Pacific Oceans with focus on South/East China Seas, IOR

Quick Facts for MCQs

Origins & Evolution

  • Tsunami Core Group 2004 became seed for Quadrilateral Security Dialogue
  • Formalised 2007, paused 2008 under Beijing pressure, revived 2017 Philippines
  • Leader summits since 2021 deepen agenda beyond security

Key Initiatives

  • IPMDA satellites share data on illegal fishing and grey-zone tactics
  • MAITRI builds coast-guard, law-enforcement capacity across Indo-Pacific
  • Quad Fellowship funds STEM post-grads; now open to ASEAN nationals

India Angle

  • MaritimeSecurity; complements SAGAR, counters “String of Pearls” encirclement
  • SupplyChain; SCRI, semiconductor network attract post-Covid manufacturing shifts
  • SoftPower; scholarships, cancer mission, AI-ENGAGE boost regional goodwill

Operational Gaps

  • Structure; absence of secretariat slows coordinated action and funding
  • DivergentPriorities; US-Japan security focus vs India-Australia development tilt
  • Overlap; ASEAN, AUKUS, IPEF duplication risks resource dilution

Key Data Points

FeatureData-Point
MembersIndia, USA, Japan, Australia
Formal structureNo treaty, no secretariat
Origin event2004 Indian Ocean tsunami relief
Term proposed2007 by Japan’s PM Shinzo Abe
Australian withdrawal2008; returned 2017 Manila meet
Flagship drillMalabar; Australia joined 2020
Core maritime toolIPMDA for real-time vessel tracking
Health projectQuad Cancer Moonshot on cervical cancer
Tech focusOpen RAN for secure 5G
2025 Quad meet in IndiaRegional Ports & Transportation Conference

Related UPSC Prelims PYQs

CAPF_GAI, GEO_GS 2024PYQ 1

Which one among the following statements with regard to India’s maritime initiative, SAGAR, is correct?

CAPF_GAI, GEO_GS 2025PYQ 2

Which one of the following countries hosted the QUAD Leaders' Summit in 2024?

GS-3S&T

15.Fighter Jet Generational Evolution (Fighter Jet Tech)

Indian Express

What & Where

Concept: “Generations” classify fighter jets by era-specific leaps in speed, stealth, avionics and weapons.

Types: 1st Gen ➜ 6th Gen; 5th Gen currently operational, 6th Gen prototypes under development.

Geography: 5th Gen in service only with USA, Russia, China; India developing AMCA for similar capability.

Quick Facts for MCQs

Tech & Schemes

  • 6th Gen envisages AI-assisted cockpit, optionally unmanned sortie capability, loyal wingman drones.
  • Hypersonic cruise, variable-cycle engines targeted for sustained Mach 5+ dash.
  • Directed-energy modules planned for missile defence and electronic attack roles.

International Examples

  • Tempest: UK-Italy-Japan joint 6th Gen; entry into service aimed ~2035.
  • NGAD: US Air Force Next-Generation Air Dominance; manned-unmanned family concept.
  • Baidi: Reported Chinese 6th Gen images circulating; official confirmation pending.

Security Dimension

  • Stealth race intensifying; 5th Gen provides low-observable first-strike edge.
  • Network-centric data fusion gives battlespace awareness, complicating adversary air-defence calculus.
  • Hypersonic plus AI may compress decision loops, elevating deterrence thresholds.

Indian Context

  • AMCA targets twin-engine, stealth, supercruise; first flight projected late 2020s.
  • DRDO collaborating with ADA, IAF; engine selection yet finalised.
  • Indigenous push aligns with Make-in-India, reducing import dependency.

Key Data Points

FeatureData-Point
1st Gen Era1943 – 1955
2nd Gen Era1955 – 1970
3rd Gen Key Add-onBeyond-visual-range combat
4th Gen HallmarksFly-by-wire, multi-role design
5th Gen Start2000 onwards
5th Gen JetsF-22, F-35, Su-57, J-20
5th Gen OperatorsUSA, Russia, China
India’s ProgrammeAMCA (design phase)
6th Gen StatusIn development; no operational jets
6th Gen Core TechHypersonic speed, AI, directed-energy weapons

Related UPSC Prelims PYQs

CAPF_GAI, GS1 2024PYQ 1

Consider the following aircraft:

CAPF_GAI, GS1 2022PYQ 2

निम्नलिखित कथनों पर विचार कीजिए :

GS-3Security

16.Defence Ministry Year of Reforms 2025 (Defense Reforms)

PIB

What & Where

Initiative: 2025 declared ‘Year of Reforms’ to modernise Indian Armed Forces.

Scope: Year-long MoD programme covering jointness, tech adoption, exports, veterans’ welfare.

Geography: Applies to all tri-services and defence industrial ecosystem across India.

Quick Facts for MCQs

Tech & Schemes

  • AI/Robotics focus: Drive autonomous systems, decision support, unmanned platforms.
  • Hypersonic push: Accelerate long-range, high-speed missile R&D.
  • Cyber-Space domain: Strengthen offensive & defensive capabilities for network-centric warfare.

Security Dimension

  • Integrated Theatre Commands: Merge service assets under unified operational commands for rapid response.
  • Multi-domain operations: Synchronise land, sea, air, cyber, space for future conflicts.
  • Combat readiness: Continuous capability development through streamlined acquisitions.

Economic Angle

  • Defence exports: Target new markets via PPPs and indigenous tech.
  • R&D investment: Incentivise startups, MSMEs to join supply chain.
  • Simplified procurement: Reduce timelines, boost domestic manufacturing orders.

Social Concerns

  • Veterans welfare: Upgrade pensions, healthcare, resettlement schemes.
  • Skill utilisation: Engage ex-servicemen in training, advisory, cyber security roles.

Key Data Points

FeatureData-Point
Declared byMinistry of Defence, GoI
Year tagged2025
Main goalTransform forces into technologically advanced, combat-ready entity
Core doctrine shiftEstablish Integrated Theatre Commands
Priority techAI, robotics, hypersonic, cyber, space
Acquisition reformSimplified, time-bound procurement pipelines
Export ambitionPosition India as global defence exporter
Veterans angleEnhance welfare, utilise expertise in reforms
Civil-military linkPromote technology transfer, R&D partnerships
Overarching themeMulti-domain operations & enhanced jointness

Related UPSC Prelims PYQs

CAPF_GAI, ESE_GS 2024PYQ 1

Which one of the following is associated with 'SPRINT Challenges' aimed at giving a boost to the usage of 75 new indigenous technologies/products in collaboration with Innovations for Defence Excellence, NIIO and Technology Development Acceleration Cell?

CAPF_GAI, ESE_GS 2025PYQ 2

Which one among the following statements about the Department of Defence (DoD) is not correct?

GS-2Scheme

17.Pradhan Mantri Fasal Bima Continuation (Crop Insurance)

DD News

What & Where

PM Fasal Bima Yojana: pan-India crop-insurance scheme of Agriculture Ministry, launched 2016.

Works on notified area basis; village/village-panchayat unit for major crops, voluntary since Kharif 2020.

Union Cabinet cleared continuation to 2025-26 with ₹69,515 cr outlay.

Quick Facts for MCQs

Premium Structure

  • Kharif: 2 % farmer premium, remaining subsidised equally.
  • Rabi: 1.5 % farmer premium; identical subsidy pattern.
  • Commercial crops: 5 % farmer share, highest among categories.

Risk Coverage

  • Yield: drought, flood, cyclone, pest, hailstorm losses.
  • Prevented sowing: 25 % payout when weather blocks planting.
  • Post-harvest: 14-day protection against cyclones/heavy rain.

Technology & Implementation

  • Satellite, drones, remote sensing, AI integrated for yield assessment.
  • YES-TECH targets lower reliance on crop-cutting experiments.
  • Mobile app enables 72-hour self-reporting of crop loss.

Funding & Governance

  • Government subsidy uncapped, ensuring farmer premium ceilings.
  • Equal Centre-State contribution irrespective of actuarial premium.
  • Scheme linked to KCC loans, encouraging formal credit flow.

Beneficiaries & Area

  • Eligibility: all farmers with insurable interest in notified crops.
  • Village/Village-Panchayat designated as smallest insurance unit.
  • Localised risk claims settle at individual farm level.

Key Data Points

FeatureData-Point
Launch year2016
Admin ministryAgriculture & Farmers Welfare
Fresh approval span2020-21 to 2025-26
Cabinet allocation₹69,515 crore
Farmer premium: Kharif2 % of sum insured
Farmer premium: Rabi1.5 %
Farmer premium: Commercial/Horticulture5 %
Central-State subsidy ratioEqual share; no upper cap
Participation modeVoluntary from Kharif 2020
Unit of insuranceVillage/Village-Panchayat
Prevented sowing claimUp to 25 % insured sum
Post-harvest cover14 days drying period
Localised risksHailstorm, landslide, inundation
Reporting window72 hrs via Crop Insurance App
Tech initiativeYES-TECH for satellite/drone yield estimates

Related UPSC Prelims PYQs

ESE_GS, GS1 2025PYQ 1

Which one of the following Yojanas replaces two schemes – National Agricultural Insurance Scheme (NAIS), 1999 as well as the Modified National Agricultural Insurance Scheme (MNAIS), 2010 – by incorporating the best features of all these schemes while removing the previous shortcomings and weaknesses?

ESE_GS, GS1 2016PYQ 2

With reference to ‘Pradhan Mantri Fasal Bima Yojana’, consider the following statements:

GS-1Misc

18.UDISE Plus 2023-24 Education Insights (School Education Data)

Economic Times

What & Where

Database: Unified District Information System for Education Plus (UDISE+), annual school-education census, Ministry of Education.

Coverage: ~14.9 lakh recognised schools, student-, teacher-, infrastructure-wise data across every Indian district.

Purpose: Track enrolment, resources, equity; feed NEP-2020 monitoring & evidence-based interventions.

Quick Facts for MCQs

Social Concerns

  • Enrolment-drop highest in SC (-2.6 %) & OBC (-2.2 %) cohorts, signalling widening equity gap.
  • GER declines registered at foundational, preparatory, middle & secondary levels; dropout risk rises with grade.
  • Minority trend: Muslim numbers fell 0.01 Cr despite near-static share, indicating persistent access barriers.

Infrastructure & Quality

  • Teacher availability uneven; poor training lowers learning outcomes, hampers NEP competency goals.
  • Infrastructure utilisation skewed among states; some surplus classrooms coexist with acute shortages elsewhere.
  • UDISE+ geo-tagged data enables targeted building rationalisation and resource redeployment.

Policy Targets

  • NEP-2020 goal: universal school GER 100 % by 2030; UDISE+ is primary progress tracker.
  • Inclusive measures: scholarships, hostels, bridge courses planned for SC/ST/OBC/Minority retention.
  • Student-wise digital IDs proposed to flag early dropouts and guide real-time remedial action.

Key Data Points

FeatureData-Point
Report year2023-24
Total enrolment24.8 Cr
YoY change−0.37 Cr
Girl enrolment11.93 Cr
Boy enrolment12.87 Cr
SC enrolment4.47 Cr
ST enrolment2.46 Cr
OBC enrolment11.2 Cr
Muslim enrolment3.92 Cr

Related UPSC Prelims PYQs

CAPF_GAI, CDS_GK 2020PYQ 1

मानव विकास सूचकांक बनाने के लिए संयुक्त राष्ट्र विकास कार्यक्रम (UNDP) द्वारा वर्तमान में, निम्नलिखित में से कौन सा एक शिक्षा विकास सूचक प्रयोग किया जाता है ?

CAPF_GAI, CDS_GK 2025PYQ 2

NEP 2020 के दिशा-निर्देश के अनुसार, 'पोषण और पढ़ाई पूर्व' (PPBP), निम्नलिखित में से किस कार्यक्रम के अंतर्गत प्रारंभ की गई है?

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