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In-orbit servicing can extend satellite lifespan by refueling or repairing components in space.
- True
- False
Answer: True
In-orbit servicing (robotic arms, refueling, upgrades) extends satellite life, reduces space debris, and enables new business models. ISRO's SPADEX tested docking; global companies (Northrop, Astroscale) develop servicing tech. Critical for space sustainability and economy questions.
Which battery chemistry is dominant in electric vehicles due to high energy density?
- Lead-Acid
- LFP
- NMC
- Sodium-Ion
Answer: NMC
NMC (Lithium Nickel Manganese Cobalt Oxide) offers high energy density for EV range, balanced with cost and safety. LFP (Lithium Iron Phosphate) is safer, cheaper, longer-life but lower energy density. India's ACC PLI supports both. Critical for EV technology questions.
Materials that change properties in response to external stimuli like temperature or stress are called ________ Materials.
Answer: Smart / Responsive
Smart materials (piezoelectrics, shape-memory alloys, electrochromics) respond to stimuli: mechanical stress, temperature, electric/magnetic fields. Applications: sensors, actuators, adaptive structures. India researches at DRDO, IITs. Critical for advanced materials and IoT questions.
Which material is commonly used as substrate for silicon semiconductor manufacturing?
- Sapphire
- Silicon Wafer
- Glass
- Plastic
Answer: Silicon Wafer
Silicon wafers (single-crystal, polished discs) are foundational substrate for IC fabrication due to: abundance, mature processing, and suitable electronic properties. Compound semiconductors (GaAs, SiC) used for specialized applications. Critical for understanding chip manufacturing basics.
Social engineering attacks manipulate human psychology rather than exploiting technical vulnerabilities.
- True
- False
Answer: True
Social engineering (phishing, pretexting, baiting) exploits human trust, curiosity, or fear to gain access or information. Often more effective than technical exploits. Defense: security awareness training, verification protocols, and least-privilege access. Critical for holistic cybersecurity understanding.
Which satellite constellation provides global broadband internet coverage?
- NavIC
- OneWeb
- GSAT
- CARTOSAT
Answer: OneWeb
OneWeb (partly Indian-owned via Bharti Group) operates LEO satellite constellation for global broadband, especially rural/remote areas. Competes with Starlink. Critical for digital connectivity and space commerce questions. NavIC is navigation; GSAT is communication; CARTOSAT is earth observation.
The technology that stores energy by compressing air in underground caverns is called ________ Storage.
Answer: Compressed Air Energy / CAES
CAES stores energy by compressing air during low demand, releasing through turbines during peak. Adiabatic CAES recovers compression heat for higher efficiency. Suitable for large-scale, long-duration storage. India explores CAES for renewable integration. Critical for grid-scale storage questions.
Which property makes aerogels suitable for thermal insulation in space applications?
- High Density
- Low Thermal Conductivity
- Electrical Conductivity
- Magnetic Properties
Answer: Low Thermal Conductivity
Aerogels are ultra-light porous materials (~99% air) with extremely low thermal conductivity, making them excellent insulators. Used in Mars rovers, spacecraft, and building insulation. India researches aerogels at ISRO and IITs. Critical for materials science and space tech questions.
Chiplet architecture enables modular design by combining multiple smaller dies in a single package.
- True
- False
Answer: True
Chiplets integrate multiple specialized dies (CPU, GPU, I/O) via advanced packaging (2.5D/3D), improving yield, cost, and design flexibility vs monolithic chips. Used in AMD, Intel products. India's semiconductor strategy includes ATMP (assembly, test, mark, pack) capabilities. Critical for chip design questions.
Which tool is commonly used for network scanning and vulnerability assessment?
- Wireshark
- Nmap
- Metasploit
- John the Ripper
Answer: Nmap
Nmap (Network Mapper) scans networks for hosts, ports, services, and OS detection. Foundation for vulnerability assessment. Wireshark is packet analyzer; Metasploit is exploitation framework; John the Ripper is password cracker. Critical for cybersecurity tools knowledge in exams.
The Indian regulatory body for authorizing private space activities is called ________.
Answer: IN-SPACe
IN-SPACe (Indian National Space Promotion and Authorization Centre) is single-window regulator for private sector space activities: licensing, facilitation, technology transfer. Established under DOS to implement space policy reforms. Critical for understanding India's space governance framework.
Which metric measures the total energy a battery can deliver over its lifetime?
- Energy Density
- Power Density
- Cycle Life
- Lifetime Energy Throughput
Answer: Lifetime Energy Throughput
Lifetime Energy Throughput = Nominal Capacity × Cycle Life × Depth of Discharge. Critical for comparing storage economics: high-throughput batteries (LFP, flow) suit frequent cycling; high-energy-density (NMC) suit weight-sensitive applications. Essential for energy storage planning questions.
Shape-memory alloys can return to original shape when heated after deformation.
- True
- False
Answer: True
Shape-memory alloys (Nitinol: Ni-Ti) undergo reversible phase transformation, enabling shape recovery upon heating. Applications: medical stents, actuators, aerospace. India researches SMAs at DMRL, IITs. Critical for smart materials and advanced manufacturing questions.
Which step in semiconductor fabrication involves transferring circuit patterns onto silicon wafers?
- Etching
- Photolithography
- Deposition
- Doping
Answer: Photolithography
Photolithography uses light to transfer mask patterns onto photoresist-coated wafers, defining circuit features. Critical for miniaturization; EUV lithography enables sub-7nm nodes. Other steps: deposition (add layers), etching (remove material), doping (modify conductivity). Critical for chip manufacturing questions.
The technique of testing web applications for vulnerabilities like SQL injection and XSS is called ________ Testing.
Answer: Web Application / DAST
Web Application Penetration Testing (DAST - Dynamic Application Security Testing) identifies vulnerabilities: SQL injection, XSS, CSRF, auth flaws. Tools: Burp Suite, OWASP ZAP. Critical for securing digital services and compliance with security standards in banking/government exams.
Which Indian startup is developing small satellite launch vehicles for commercial missions?
- Skyroot Aerospace
- Agnikul Cosmos
- Both A and B
- Neither
Answer: Both A and B
Skyroot Aerospace (Vikram series) and Agnikul Cosmos (Agnibaan) are Indian private startups developing small launch vehicles for dedicated small satellite missions. Supported by IN-SPACe and NSIL. Represents India's emerging commercial space ecosystem. Critical for space economy questions.
Flow batteries are well-suited for long-duration grid energy storage due to decoupled power and energy capacity.
- True
- False
Answer: True
Flow batteries (vanadium redox) store energy in liquid electrolytes; power (stack size) and energy (tank volume) are independent. Advantages: long cycle life, deep discharge, scalability for 4-12 hour storage. Critical for renewable integration and grid stability questions.
Which nanomaterial property enables targeted drug delivery in medical applications?
- High Surface Area
- Quantum Confinement
- Superparamagnetism
- All of these
Answer: All of these
Nanomaterials enable: high surface area for drug loading, quantum effects for imaging, superparamagnetism for magnetic targeting. Applications: cancer therapy, diagnostics, tissue engineering. India's Nano Mission supports research. Critical for nanotechnology and healthcare innovation questions.
The transistor architecture that wraps the gate around the channel for better control at small nodes is called ________ Transistor.
Answer: Gate-All-Around / GAA
GAA (Gate-All-Around) transistors (MBCFET, Nanosheet) surround channel with gate on all sides, improving electrostatic control vs FinFET at sub-3nm nodes. Enables continued scaling per Moore's Law. Critical for understanding semiconductor innovation roadmap questions.
Which phase of penetration testing involves gathering information about target systems?
- Exploitation
- Reconnaissance
- Reporting
- Post-Exploitation
Answer: Reconnaissance
Reconnaissance (information gathering) is first phase of pentest: passive (OSINT, WHOIS) and active (scanning, enumeration) techniques to map target attack surface. Followed by scanning, exploitation, post-exploitation, and reporting. Critical for cybersecurity methodology questions.