UPSC CSE Why

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Pre & Mains Notes

1. Delhi Gymkhana Club land row WHAT HAPPENED • Centre’s L&DO asked Delhi Gymkhana Club to vacate its Safdarjung Road premises, citing “public purpose” and strategic infrastructure needs. ISSUE • Government powers over leasehold land in Delhi and interpretation of “public purpose”. KEY DETAILS • Delhi land largely administered by the Centre through the Land & Development Office (L&DO). • Club operates on colonial-era lease agreements; L&DO invoked a clause allowing “re-entry” of land for public purpose. • Area lies near key government and security establishments, including PM residence zone. • Many Delhi properties shifted from leasehold to freehold after 1947, but several institutional lands remain under old lease structures. • Constitutional context: Art. 300A → property can be deprived only by authority of law. WHY IT MATTERS • Highlights tensions between elite land use and public infrastructure priorities. • Shows continuing legacy of colonial property arrangements in Delhi. • Important for urban governance, land policy, and state control over public land. 2. Rajya Sabha defections and anti-defection law WHAT HAPPENED • AAP’s claim that two-thirds of its Rajya Sabha MPs could merge with another party revived debate on the merger exception under the anti-defection law. ISSUE • Whether legislators alone can trigger a valid “merger” under the Tenth Schedule. KEY DETAILS • Anti-defection law added through the 52nd Constitutional Amendment (1985) under the Tenth Schedule. • Split exception removed by 91st Constitutional Amendment (2003); merger exception remains. • Paragraph 4 allows exemption if 2/3 legislators merge with another political party. • Core debate: does merger require approval of the original political party organisation too? • Important cases: - Kihoto Hollohan (1992) → upheld anti-defection law. - Subhash Desai case (2023) → political party organisation, not just legislative wing, matters. WHY IT MATTERS • Impacts stability of coalition and party politics. • Raises questions about inner-party democracy and legislative autonomy. • Could shape future interpretation of defections in Parliament and Assemblies. 3. Indonesia’s export policy shift WHAT HAPPENED • Indonesia proposed routing exports of major commodities through a state-run agency, deepening its resource-nationalism strategy. ISSUE • Increasing state control over natural-resource exports and its global economic impact. KEY DETAILS • Policy may centralise exports of palm oil, coal, nickel and ferronickel through state agency PT Danantara. • Indonesia is the world’s largest palm oil exporter and a key nickel producer for EV batteries. • Follows earlier measures like the 2020 nickel ore export ban aimed at domestic value addition. • Markets reacted negatively amid fears of supply disruptions and excessive state control. • India heavily depends on Indonesian palm oil and coal imports. WHY IT MATTERS • Could affect global food, energy and EV supply chains. • Reflects broader trend of “resource nationalism” worldwide. • Important for India’s energy security and edible oil inflation.

@CSEWhy Times – May 27, 2026 | Wednesday

Keywords

1. Memflation: Inflation caused by memory chips shortage 2. DRAM & NAND a) Dynamic Random Access Memory: Computer memory used in PCs, laptops and smartphones to temporarily store data the processor needs to actively use. b) NAND (flash): Slower than DRAM, non volatile storage memory used in smartphones that retains data even without power.

@CSEWhy Newspaper Recos

Indian Express 1. In new world, with US, India has the cards. It must play the confidently (read for awareness) 2. In warming India, local data monitoring is the key (GS3 Global Warming) The Hindu 📰 1. The judiciary's role in Complete Justice (Article 142 and its role)

Friends, do you now realize how written words like that in Blog, Telegram or X has more value than noisy videos? I am working on tracing Qs from CSEWhy sources and can confirm good results from CSEWhy Blog You can subscribe for FREE at blog.csewhy.com with your email

Provisional Answer Key ke saath explanation bhi dena chahiye as to in UPSC CSE, Why is this Q marked at this option Bacche Har Q ko galat bta rahe hai 🤭😂

GS2 CSAT Provisional Answer Key

Zero FIR Q in UPSC 2026 has no logical answer If you want to, submit objection on this Q!

Question cancelled by #UPSC in Provisional Answer Key

Provisional Answer Key by UPSC for UPSC Prelims 2026

Detailed blog covering Genome India Project Collating the details, will share more direct resources from CSEWhy X, Telegram, Blog and now Instagram too :) meanwhile, thinking of launching Current Affairs Course - PDF notes - weekly live classes - Hindu, Express, PIB - cohort like study routine shall I launch it for Pre27?

@CSEWhy Times – May 26, 2026 | Friday

Pre & Mains Notes

1. CBSE’s digital evaluation system controversy WHAT HAPPENED • CBSE’s On-Screen Marking (OSM) system for Class 12 answer-sheet evaluation faced criticism over missing pages, marking errors, and reduced examiner payments. ISSUE RAISED • Challenges in digitisation of large-scale examination evaluation systems. CURRENT CONTEXT • OSM involves scanning answer sheets and evaluating them digitally. • Over 1.8 crore answer-book pages evaluated under system. • Examiners reported technical glitches and unusually lengthy responses. • Concerns over inaccurate marking and reduced evaluation quality. • CBSE defended system citing standardisation and reduced human error. • IIT Kanpur and IIT Madras consulted for technical improvements. WHY IT MATTERS • Raises concerns about fairness and reliability in board examinations. • Highlights implementation challenges in digital governance reforms. • Impacts student trust and academic assessment credibility. • Relevant for GS2: education governance and digital systems.

@CSEWhy Newspaper Recos

Indian Express 1. Should RBI defend rupee or let it be at its own level? (read for awareness) 2. Young must lead us to Viksit Bharat, Amrit Kaal is the era of hard work (Indian VP's article) The Hindu 📰 1. India & Australia, bridging the trade & trust barrier (take a closer look here, must needed!) 2. Water Governance in peri-urban areas (Must read for GS1 Urbanization) 3. Why is Indian rupee falling? (imp. read, read to understand)

@CSEWhy Times – May 25, 2026 | Thursday

Pre & Mains Notes

1. Earth’s outer core dynamics WHAT HAPPENED • Scientists identified shifts in Earth’s outer core flow patterns, linked to changes in Earth’s magnetic field. ISSUE RAISED • Understanding deep-Earth processes and geomagnetic behaviour. CURRENT CONTEXT • Outer core consists of liquid iron and nickel. • Movement in outer core generates Earth’s magnetic field (geodynamo). • Researchers observed transition from westward to eastward flow patterns. • Linked to weakening of magnetic field since 2020. • Findings suggest interactions between outer core and inner core dynamics. • Magnetic field protects Earth from harmful solar radiation. WHY IT MATTERS • Improves understanding of Earth’s magnetic field fluctuations. • Important for satellite systems, navigation, and space-weather studies. • Helps explain geomagnetic anomalies and pole shifts. • Relevant for GS1: geophysical phenomena. 2. Artificial reefs restoring Malaysian seabed WHAT HAPPENED • Conservation groups in Malaysia are deploying concrete artificial reefs to restore damaged coral ecosystems. ISSUE RAISED • Marine ecosystem restoration amid coral degradation and climate stress. CURRENT CONTEXT • Artificial reefs built using textured concrete structures. • Installed in Coral Triangle region, a biodiversity hotspot. • Aim to attract corals, fish, and marine organisms. • Coral ecosystems damaged by destructive fishing and warming oceans. • Rising sea temperatures causing coral bleaching. • Projects combine conservation with local livelihood restoration. WHY IT MATTERS • Highlights role of ecosystem restoration in climate resilience. • Coral reefs critical for fisheries, biodiversity, and coastal protection. • Demonstrates nature-based solutions for marine conservation. • Relevant for GS3: environment, biodiversity, climate change. 3. DRDO’s ULPGM-V3 missile WHAT HAPPENED • DRDO tested ULPGM-V3, an upgraded drone-launched precision-guided missile with anti-drone and strike capability. ISSUE RAISED • Evolution of network-centric and drone-based warfare systems. CURRENT CONTEXT • Missile launched from UAV platforms. • Features precision guidance and multiple warhead options. • Designed for anti-drone operations and precision strikes. • Effective in day/night and all-weather conditions. • Integrated with real-time targeting and data-link systems. • Reflects growing military use of autonomous aerial systems. WHY IT MATTERS • Strengthens India’s modern battlefield and anti-drone capability. • Supports indigenous defence technology development. • Enhances tactical flexibility in asymmetric warfare. • Relevant for GS3: defence technology and internal security.

@CSEWhy Newspaper Recos

Indian Express 1. India faces a 1991 moment: it needs to reform, relook at subsidies (imp. outlook on subsidies and economy) 2. Imp. read: 4 letter word everyone in delhi needs to know: DUST The Hindu 📰 1. What is China's Hainan FTP initiative? (read to learn) 2. When does purposeful writing evolve in children? (beautiful article) 3. Google's new 'information agent' are a privacy and web infrastructure problem (imp. tech text)

UPSC is never ‘tough’ or ‘easy’ It’s a normalizer Cut off is against percentile, not percentage If it’s tough, it’s tough for most (like 2023/2026) If it’s easy, it’s easy for most (like 2016) Don’t hate the system! Go, relax

How was CSAT?

Maps are magical! 😀✨ See image 2, just plotting National Parks on Maps can help you eliminate (3) here Once done, doesn't matter if you know it was Tiger Reserve or not, you just need to know Sakhya Sagar Well, that's on the map too! Maps from CSEWhy Visual Notes 😀

Q on rivers.