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Generate QuizTechnology – Medium Level – GK Questions
Free practice for SSC, UPSC, Banking & Railway exams. No login required.
Green hydrogen is produced by electrolysis of water using renewable electricity.
- True
- False
Answer: True
Green hydrogen is produced via water electrolysis powered by renewable energy (solar, wind), resulting in zero-carbon fuel. Contrasts with grey hydrogen (from fossil fuels) and blue hydrogen (fossil fuels + carbon capture). India's National Green Hydrogen Mission aims to make India a global hub for production and export.
Which authority is designated as the data protection regulator under the DPDP Act 2023?
- CERT-In
- RBI
- Data Protection Board of India
- TRAI
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.
Which HTML5 element is used for drawing graphics via JavaScript?
- <svg>
- <canvas>
- <figure>
- <draw>
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.
In Linux, the kill command always terminates a process immediately.
- True
- False
Answer: False
kill sends signals to processes; default is SIGTERM (15) which requests graceful termination, allowing cleanup. SIGKILL (9) forces immediate termination but doesn't allow cleanup. Processes can ignore or handle signals. Understanding process signals is important for system administration questions.
Which energy storage technology is most commonly paired with solar power systems for residential use?
- Lead-acid battery
- Lithium-ion battery
- Flow battery
- Compressed air
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.
The Indian law that specifically addresses protection of personal data is called the ________ Act 2023.
- Digital Personal Data Protection
- Horizontal
- AI-based / Machine Learning
- Smart / V2G
Answer: Digital Personal Data Protection
DPDP Act 2023 establishes framework for processing digital personal data, defining rights of data principals and obligations of data fiduciaries. Replaces Section 43A of IT Act 2000. Aligns with global standards while addressing India-specific needs. Critical for compliance questions in banking and UPSC exams.
Which traversal method visits the root node before its subtrees in a binary tree?
- Inorder
- Preorder
- Postorder
- Level-order
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.
Which Linux command displays real-time system resource usage including CPU and memory?
- ps
- top
- free
- df
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.
The Indian government scheme promoting electric vehicle adoption through subsidies is called ________.
- FAME
- UNIQUE
- DID
- CERT
Answer: FAME
FAME (Faster Adoption and Manufacturing of Electric Vehicles) India scheme provides demand incentives for EVs and charging infrastructure. FAME-II (2019) focuses on electrification of public transport and shared mobility. Part of India's commitment to reduce carbon emissions and achieve net-zero by 2070.
A binary search tree guarantees O(log n) search time even if elements are inserted in sorted order.
- True
- False
Answer: False
A standard BST degenerates to a linked list (O(n) search) if elements are inserted in sorted order. Balanced BSTs (AVL, Red-Black) maintain O(log n) by self-balancing after insertions/deletions. Understanding tree balancing is crucial for algorithm questions in SSC JE and banking IT exams.
Which CSS property is used to control the spacing between elements' borders?
- padding
- margin
- border-spacing
- gap
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.
The Linux command used to change file permissions is ________.
- Security Monitoring / CNAPP
- Hashing
- chmod
- F5 or Ctrl+R
Answer: chmod
chmod (change mode) modifies file/directory permissions in Linux using symbolic (u+rwx) or octal (755) notation. Permissions control read (r), write (w), and execute (x) access for owner, group, and others. Critical for system security and frequently tested in technical government exams.
Which technology converts sunlight directly into electricity using semiconductor materials?
- Solar Thermal
- Photovoltaic
- Wind Turbine
- Biomass
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.
Section 66A of the IT Act 2000, which dealt with offensive online messages, is currently enforceable in India.
- True
- False
Answer: False
Section 66A was struck down by the Supreme Court in Shreya Singhal v. Union of India (2015) for violating freedom of speech. It criminalized 'offensive' online content but was overly broad. Current IT Act provisions focus on cybercrime, data protection, and intermediary liability. Important for legal awareness in government exams.
In Linux, the root user has unrestricted access to all files and commands on the system.
- True
- False
Answer: True
Root (superuser) in Linux has UID 0 and bypasses all permission checks, allowing full system control. This power requires careful usage to avoid security risks. Best practice: use sudo for specific administrative tasks instead of logging in as root. Critical concept for system administration questions in technical exams.
Which Linux command is used to display the current working directory?
- ls
- cd
- pwd
- dir
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.
Which Indian initiative promotes responsible AI innovation through multi-stakeholder collaboration?
- Responsible AI for Social Empowerment (RAISE)
- Digital India Bhashini
- National AI Portal
- All of these
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.
InsurTech startups in India can directly underwrite insurance policies without IRDAI registration.
- True
- False
Answer: False
IRDAI regulations require any entity underwriting insurance policies to be a registered insurer or corporate agent. InsurTech startups typically partner with licensed insurers as technology providers, aggregators, or distribution partners. Regulatory sandbox allows testing innovations, but core risk-bearing activities remain with regulated entities to protect policyholders.
Which spectrum auction method allows bidders to bid on multiple frequency blocks simultaneously?
- Sealed Bid
- English Auction
- Simultaneous Multiple Round Auction
- Dutch Auction
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.
Which operator is used to access members of a structure through a pointer in C?
- .
- ->
- ::
- *
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.