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Which component converts electrical signals into mechanical motion in robots?
- Sensor
- Actuator
- Controller
- Processor
Answer: Actuator
Actuators (motors, hydraulic/pneumatic cylinders, piezoelectric devices) convert control signals into physical movement. Types: electric (precise, clean), hydraulic (high force), pneumatic (fast, simple). Critical for robot mobility, manipulation, and interaction. Sensors provide feedback; controllers compute actions; processors run algorithms.
Which hardware is essential for fully immersive virtual reality experiences in the metaverse?
- Smartphone
- VR Headset
- Smart Watch
- Wireless Earbuds
Answer: VR Headset
VR headsets (Oculus Quest, HTC Vive) provide stereoscopic 3D visuals, head tracking, and hand controllers for immersive interaction. Standalone headsets require no PC; PC-tethered offer higher fidelity. Emerging tech: haptic feedback, eye tracking, and brain-computer interfaces for deeper immersion. Critical for metaverse access questions.
Which material is commonly used in FDM 3D printing for prototyping?
- Titanium
- PLA
- Carbon Fiber
- Ceramic
Answer: PLA
PLA (Polylactic Acid) is a biodegradable thermoplastic derived from corn starch, widely used in FDM printing for prototypes, educational models, and hobbyist projects. Easy to print, low warping, and affordable. ABS offers higher strength; PETG combines durability and ease; metals/ceramics require specialized printers.
Which application is MOST suitable for near-term quantum computers (NISQ era)?
- Breaking RSA encryption
- Quantum chemistry simulation
- General AI
- Real-time video processing
Answer: Quantum chemistry simulation
NISQ (Noisy Intermediate-Scale Quantum) devices have 50-1000 qubits with limited coherence. Most promising near-term applications: quantum chemistry (drug discovery, materials), optimization (logistics, finance), and machine learning enhancement. Cryptography breaking requires fault-tolerant quantum computers not yet available.
Which AI technique enables robots to learn tasks through trial and error?
- Supervised Learning
- Reinforcement Learning
- Unsupervised Learning
- Transfer Learning
Answer: Reinforcement Learning
Reinforcement Learning trains agents to maximize cumulative reward through interactions with an environment. Used in robotics for manipulation, locomotion, and autonomous navigation. Differs from supervised learning (labeled data) and unsupervised learning (pattern discovery). Critical for autonomous systems and AI applications.
Which technology enables realistic avatar movement and interaction in virtual worlds?
- Motion Capture
- OCR
- Speech Synthesis
- Data Mining
Answer: Motion Capture
Motion capture (using sensors, cameras, or wearables) records human movement and maps it to digital avatars for realistic animation in metaverse platforms. Combined with facial capture and AI for expressive interactions. Critical for immersive social experiences, virtual events, and training simulations. Important for emerging tech questions.
Which industry benefits most from 3D printing's ability to create complex, lightweight structures?
- Textile
- Aerospace
- Food Processing
- Paper Manufacturing
Answer: Aerospace
Aerospace uses 3D printing (especially metal AM) for lightweight, topology-optimized components like fuel nozzles, brackets, and engine parts. Reduces weight (improving fuel efficiency), consolidates assemblies, and enables rapid prototyping. Also used in healthcare (custom implants), automotive, and defense. Critical for advanced manufacturing questions.
Which blockchain feature ensures that once data is recorded, it cannot be altered without network consensus?
- Decentralization
- Immutability
- Transparency
- Smart Contracts
Answer: Immutability
Immutability is achieved through cryptographic hashing and consensus mechanisms: each block contains hash of previous block, so altering any data changes subsequent hashes, requiring recomputation of entire chain. Decentralization prevents single-point control; transparency enables auditability; smart contracts automate logic. Core to blockchain trust model.
Which sensor is commonly used in robots for detecting obstacles using sound waves?
- LIDAR
- Ultrasonic Sensor
- Infrared Sensor
- Camera
Answer: Ultrasonic Sensor
Ultrasonic sensors emit high-frequency sound waves and measure echo return time to calculate distance. Cost-effective for short-range obstacle detection in mobile robots, parking systems, and industrial automation. LIDAR uses laser for high-precision mapping; IR for proximity; cameras for visual recognition. Important for robotics fundamentals.
Which technology combination is foundational for creating immersive metaverse experiences?
- VR + AR + Blockchain + AI
- Only VR
- Only AR
- Cloud Computing alone
Answer: VR + AR + Blockchain + AI
Metaverse integrates: VR/AR for immersive interfaces, blockchain for digital ownership (NFTs) and economy, AI for intelligent agents and content generation, and cloud/edge for scalable infrastructure. No single technology suffices; convergence enables persistent, interoperable virtual worlds. Emerging topic for future tech questions.
Which 3D printing technology uses a laser to fuse powdered material layer by layer?
- FDM
- SLA
- SLS
- BJ
Answer: SLS
SLS (Selective Laser Sintering) uses a laser to fuse polymer, metal, or ceramic powder particles into solid structures. No support structures needed as unsintered powder supports overhangs. Used for functional prototypes, end-use parts, and complex geometries. FDM extrudes filament; SLA cures resin; BJ binds powder with adhesive.
Which property of quantum bits (qubits) allows them to exist in multiple states simultaneously?
- Entanglement
- Superposition
- Interference
- Decoherence
Answer: Superposition
Superposition enables qubits to represent both 0 and 1 simultaneously, unlike classical bits. This parallelism allows quantum computers to process vast solution spaces exponentially faster for specific problems like factoring, optimization, and simulation. Entanglement correlates qubit states; interference amplifies correct answers; decoherence is error from environmental noise.
Which platform provides open access to research papers and theses from Indian institutions?
- Shodhganga
- SWAYAM
- NPTEL
- e-PG Pathshala
Answer: Shodhganga
Shodhganga is a digital repository of Indian theses and dissertations hosted by INFLIBNET. Provides open access to research output, promoting knowledge sharing and avoiding duplication. Critical for academic research infrastructure and open science questions.
Which digital initiative enables portability of health insurance across providers?
- ABHA
- HCX
- e-Sanjeevani
- Ayushman Bharat PM-JAY
Answer: HCX
Health Claims Exchange (HCX) standardizes data formats and protocols for insurance claims, enabling seamless portability between insurers and providers. Reduces administrative burden and improves user experience. Critical for health financing reform and digital infrastructure questions.
Which healthtech startup pioneered AI-based radiology diagnostics in India?
- Practo
- Portea
- Qure.ai
- PharmEasy
Answer: Qure.ai
Qure.ai develops AI algorithms for interpreting medical images (X-rays, CT scans) to detect TB, pneumonia, and other conditions. Deployed in public health programs and hospitals globally. Represents India's strength in AI for social impact. Important for healthtech innovation questions.
Which technology uses satellite data for crop yield estimation and insurance assessment?
- Remote Sensing
- IoT Sensors
- Blockchain
- AI Chatbots
Answer: Remote Sensing
Remote sensing via satellites (like Resourcesat, Sentinel) provides multispectral imagery for crop health monitoring, acreage estimation, and yield prediction. Used in PMFBY (crop insurance) for objective loss assessment. Critical for technology-enabled agricultural policy and risk management questions.
Which indigenous electronic warfare suite is integrated with Tejas fighter aircraft?
- EWSS
- Uttam
- Shakti
- Mayavi
Answer: EWSS
EWSS (Electronic Warfare Support Suite) developed by DRDO provides radar warning, jamming, and countermeasures for Tejas. Enhances survivability in contested airspace. Represents self-reliance in critical avionics. Important for defense technology indigenization questions.
Which initiative provides digital infrastructure for online examinations and assessments?
- PARAKH
- DIKSHA
- SWAYAM
- National Testing Agency Portal
Answer: PARAKH
PARAKH (Performance Assessment, Review, and Analysis of Knowledge for Holistic Development) is proposed under NEP 2020 as a national assessment center. Will set standards, conduct surveys, and promote technology-enabled assessments. Critical for education reform and quality assurance questions.
Which technology enables AI-based triage of patients in emergency departments?
- Electronic Health Records
- Clinical Decision Support Systems
- Telemedicine
- Wearable Monitors
Answer: Clinical Decision Support Systems
CDSS use AI/ML to analyze patient data, symptoms, and guidelines to assist clinicians in diagnosis and treatment decisions. Enable rapid triage, reduce errors, and standardize care. Integrated with EHRs for real-time insights. Important for AI in healthcare and hospital management questions.
Which edtech startup became India's most valuable startup before going public?
- Byju's
- Unacademy
- upGrad
- Vedantu
Answer: Byju's
Byju's achieved peak valuation of $22 billion in 2022, becoming India's most valuable startup. Founded in 2011, it offers personalized learning apps for K-12 and test prep. Represents scale and global ambition of Indian edtech. Important for entrepreneurship and economy questions.