GK Questions

Answer: man

man (manual) displays documentation for Linux commands, system calls, and configuration files. Example: man ls shows options and usage. help is for shell builtins; info provides hypertext docs; doc is not standard. Proficiency with man is essential for self-learning and troubleshooting in system administration.

Answer: Direction 20

CERT-In Direction 20 (April 2022) requires service providers including VPNs to maintain logs of customer registration and usage for 180 days, report cyber incidents within 6 hours, and synchronize with NTP. Aimed at enhancing incident response and law enforcement capabilities. Important for cybersecurity compliance questions.

Answer: getElementById()

getElementById('id') returns the element with specified ID (case-sensitive). querySelector() uses CSS selectors for more flexibility. getElementsByClassName/TagName return collections. DOM manipulation is core to interactive web development and frequently tested in programming sections of exams.

Answer: Panchamrit Strategy

Panchamrit (five nectars) announced at COP26 includes: 500 GW non-fossil capacity by 2030 (updated from 450 GW), 50% energy from renewables, 1 billion tonne CO2 reduction, net-zero by 2070. National Solar Mission is a component; Green Energy Corridor enables transmission; Surya Mitra trains solar technicians.

Answer: Queue

Queue follows FIFO: first element added is first removed. Operations: enqueue (add rear), dequeue (remove front). Used in CPU scheduling, print spooling, breadth-first search. Stack follows LIFO. Understanding fundamental data structure behaviors is essential for programming exams.

Answer: grep

grep (global regular expression print) searches files for lines matching a pattern/string. Supports regex, recursive search, and context display. find locates files by name/path; locate uses a database; search is not a standard command. Essential for log analysis and text processing in system administration.

Answer: Data Protection Board of India

Data Protection Board of India is an independent regulatory body established under DPDP Act 2023 to enforce provisions, adjudicate disputes, and impose penalties. CERT-In handles cybersecurity incidents; RBI regulates financial data; TRAI oversees telecom. Understanding regulatory roles is key for governance questions.

Answer: <canvas>

<canvas> provides a bitmap area for rendering graphics via JavaScript (lines, shapes, images, animations). <svg> is for vector graphics defined in XML. Both enable interactive visuals, but canvas is pixel-based and better for games/real-time rendering. Important for web development fundamentals.

Answer: Lithium-ion battery

Lithium-ion batteries offer high energy density, long cycle life, and declining costs, making them ideal for residential solar storage. Lead-acid is cheaper but heavier with shorter lifespan. Flow batteries suit grid-scale storage. India's PLI scheme promotes domestic Li-ion cell manufacturing for energy transition.

Answer: Preorder

Preorder traversal: Root → Left Subtree → Right Subtree. Inorder: Left → Root → Right (gives sorted order for BST). Postorder: Left → Right → Root. Level-order uses queue for breadth-first traversal. Tree traversals are frequently tested in SSC JE and programming exams.

Answer: top

top provides dynamic real-time view of running processes, CPU usage, memory consumption, and system load. ps shows snapshot of processes; free displays memory stats; df shows disk space. Essential for system monitoring and troubleshooting in technical exams and real-world administration.

Answer: Section 66C

Section 66C prescribes punishment (up to 3 years imprisonment + fine) for identity theft: fraudulently using another person's electronic signature, password, or unique identification feature. Section 66D covers cheating by personation using computer resources. Important for legal awareness in banking and SSC exams.

Answer: margin

Margin creates space outside an element's border, separating it from neighboring elements. Padding creates space inside the border (between content and border). Border-spacing applies to table cells. Gap is used in flexbox/grid layouts. Fundamental CSS concept for web development questions.

Answer: Photovoltaic

Photovoltaic (PV) cells use semiconductor materials (typically silicon) to convert photons from sunlight directly into electrical current via the photovoltaic effect. Solar thermal uses heat to generate steam for turbines. PV is the technology behind solar panels widely promoted under India's National Solar Mission.

Answer: Hash Map + Doubly Linked List

LRU cache requires O(1) access and O(1) reorder on access. Hash map provides O(1) key lookup; doubly linked list maintains usage order with O(1) move-to-front. Combined, they achieve O(1) get/put operations. Classic system design question for SSC JE and banking IT exams.

Answer: pwd

pwd (print working directory) displays the absolute path of the current directory in Linux/Unix systems. ls lists directory contents, cd changes directory, and dir is a Windows command. Essential for navigation and scripting in command-line environments frequently tested in SSC JE and Railway exams.

Answer: All of these

India's AI ecosystem includes: RAISE summit for global dialogue on ethical AI, Bhashini for inclusive AI in Indian languages, National AI Portal (by MeitY & NASSCOM) for resources and collaboration. Supported by research centers (C3i, T-Hub), industry partnerships, and policy frameworks. Aims to balance innovation with ethics, inclusion, and national interest.

Answer: Simultaneous Multiple Round Auction

SMRA (Simultaneous Multiple Round Auction) allows bidders to bid on multiple spectrum lots across bands in multiple rounds, with prices rising based on demand. Used in India's 2G/3G/4G/5G auctions. Promotes price discovery, reduces exposure risk (bidding on complementary blocks), and enhances efficiency vs sequential auctions.

Answer: ->

Arrow operator (->) accesses structure members via pointer: ptr->member equivalent to (*ptr).member. Dot operator (.) is for direct structure variables. Understanding pointer arithmetic and memory layout is crucial for systems programming, embedded development, and technical exams. Common source of segmentation faults if misused.

Answer: AML Transaction Monitoring

AML (Anti-Money Laundering) transaction monitoring uses AI/ML to analyze transactions in real-time, flag suspicious patterns, and generate regulatory reports (STRs). Reduces manual effort, improves detection accuracy, and ensures compliance with RBI/FIU-IND guidelines. Part of broader RegTech suite including KYC automation, risk assessment, and audit trails.