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Which theorem simplifies complex linear circuits to a single voltage source and series resistance?
- Kirchhoff's Law
- Thevenin's Theorem
- Norton's Theorem
- Both B and C
Answer: Both B and C
Thevenin's Theorem: any linear circuit = voltage source (Vth) + series resistance (Rth). Norton's Theorem: equivalent = current source (In) + parallel resistance (Rn). They are duals; conversion: Vth = In × Rn. Essential for circuit analysis, load matching, and troubleshooting. Applicable to AC circuits using impedance.
Which international framework provides guidelines for trustworthy AI development adopted by many countries?
- GDPR
- OECD AI Principles
- Paris Agreement
- Basel III
Answer: OECD AI Principles
OECD AI Principles (2019) provide values-based guidelines for trustworthy AI: inclusive growth, human-centered values, transparency, robustness, and accountability. Adopted by 40+ countries including India. Influences national policies, corporate governance, and international cooperation on AI. Complements technical standards from ISO/IEC and IEEE.
Which 5G core network architecture enables service-based interfaces and cloud-native deployment?
- EPC
- 5GC
- IMS
- Both B and C
Answer: 5GC
5GC (5G Core) uses service-based architecture (SBA) with cloud-native principles: microservices, containerization, CI/CD. Contrasts with 4G EPC's monolithic design. Benefits: flexibility, scalability, faster feature deployment, and network slicing support. IMS (IP Multimedia Subsystem) handles voice/video services and works with both EPC and 5GC.
Which sorting algorithm has best-case time complexity of O(n) when input is already sorted?
- Quick Sort
- Merge Sort
- Bubble Sort
- Heap Sort
Answer: Bubble Sort
Bubble Sort with optimization (stop if no swaps in a pass) achieves O(n) best-case for already sorted input. However, average/worst-case remains O(n²). For exams: know trade-offs - Bubble (simple, inefficient), Quick (fast average, worst O(n²)), Merge (stable, O(n log n) always), Heap (in-place, O(n log n)).
Which technology enables real-time fraud detection in digital payments using pattern analysis?
- Blockchain
- Machine Learning
- OCR
- SMS Gateway
Answer: Machine Learning
ML models analyze transaction patterns (amount, location, time, device) to detect anomalies indicating fraud. Techniques: supervised learning (labeled fraud data), unsupervised anomaly detection, and real-time scoring. Used by banks, UPI apps, and payment gateways. Continuous learning adapts to evolving fraud tactics while minimizing false positives.
Which component is used to amplify weak electrical signals in analog circuits?
- Diode
- Transistor
- Resistor
- Capacitor
Answer: Transistor
Transistor (BJT or FET) amplifies weak signals by using small input current/voltage to control larger output current. Configurations: common emitter (high gain), common collector (impedance matching). Foundation of audio amplifiers, radio receivers, and sensor interfaces. Operational amplifiers (op-amps) integrate multiple transistors for precision amplification.
Which technique is used to detect and mitigate bias in AI training datasets?
- Data Augmentation
- Adversarial Debiasing
- Feature Scaling
- Cross-Validation
Answer: Adversarial Debiasing
Adversarial Debiasing uses adversarial networks to remove correlations between protected attributes (gender, caste) and model predictions while preserving task performance. Other techniques: reweighting samples, bias-aware preprocessing, fairness constraints in loss function. Critical for ethical AI in hiring, lending, and public services where bias can perpetuate inequality.
Which technology enables multiple antennas to transmit/receive simultaneously for higher data rates in 4G/5G?
- OFDM
- MIMO
- CDMA
- TDMA
Answer: MIMO
MIMO (Multiple Input Multiple Output) uses multiple antennas at transmitter and receiver to send/receive multiple data streams simultaneously over same frequency. Increases spectral efficiency, data rates, and link reliability. Evolution: SU-MIMO (single user) to MU-MIMO (multi-user). Foundational for 4G LTE-Advanced and 5G NR performance.
Which data type is used to store true/false values in most programming languages?
- int
- char
- boolean
- float
Answer: boolean
Boolean data type represents two values: true or false. Named after George Boole, founder of Boolean algebra. Used in conditional statements, loops, and logical operations. Some languages (C) use integers (0=false, non-zero=true), but modern languages (Java, Python, C#) have dedicated bool type for clarity and type safety.
Which RBI guideline mandates that digital lending apps must be operated only by regulated entities?
- Digital Payments Guidelines
- Digital Lending Guidelines 2022
- NBFC Framework
- P2P Lending Rules
Answer: Digital Lending Guidelines 2022
RBI's Digital Lending Guidelines (2022) require: lending only by regulated entities (banks/NBFCs), direct fund flow between lender and borrower (no third-party pools), standardized key fact statements, cooling-off period, and grievance redressal. Aims to protect consumers from predatory apps, data misuse, and unfair recovery practices.
Which logic gate outputs HIGH only when both inputs are HIGH?
- OR
- AND
- XOR
- NAND
Answer: AND
AND gate outputs 1 (HIGH) only when all inputs are 1. Truth table: 0+0→0, 0+1→0, 1+0→0, 1+1→1. Fundamental for digital circuits, arithmetic units, and control logic. NAND/NOR are universal gates (can implement any Boolean function). XOR outputs 1 when inputs differ; useful for parity checks and adders.
Which Indian government body is responsible for developing standards and guidelines for AI adoption?
- NITI Aayog
- MeitY
- DST
- All of these
Answer: All of these
AI governance in India is multi-stakeholder: NITI Aayog leads strategy (#AIforAll), MeitY handles policy/regulation and DPDP Act, DST funds R&D through NM-ICPS. BIS develops technical standards; CERT-In addresses security. Collaborative approach ensures balanced innovation, ethics, and national interest in AI deployment.
Which technology enables dynamic spectrum sharing between 4G and 5G on same frequency band?
- Carrier Aggregation
- DSS
- MIMO
- Beamforming
Answer: DSS
DSS (Dynamic Spectrum Sharing) allows 4G LTE and 5G NR to coexist on same frequency band by dynamically allocating resources based on real-time demand. Enables faster 5G rollout using existing spectrum without refarming. Trade-off: slight capacity reduction vs accelerated coverage. Key for operators transitioning from 4G to 5G.
Which loop structure guarantees execution of the loop body at least once?
- for
- while
- do-while
- foreach
Answer: do-while
do-while loop checks condition AFTER executing the body, ensuring at least one iteration. Syntax: do { ... } while(condition);. Useful for menu-driven programs, input validation where first attempt is always needed. while/for check condition BEFORE execution, potentially skipping body entirely if condition initially false.
Which technology enables instant verification of bank account details using account number and IFSC?
- Penny Drop
- NEFT Validation
- RTGS Check
- IMPS Confirm
Answer: Penny Drop
Penny Drop verification sends ₹1 to a bank account using account number and IFSC; successful credit confirms account validity and name match. Used for KYC, onboarding, and fraud prevention in fintech. Automated via NPCI's APIs. Faster and more reliable than manual document verification, enhancing user experience and compliance.
Which component stores electrical energy in an electric field?
- Resistor
- Inductor
- Capacitor
- Transformer
Answer: Capacitor
Capacitor stores energy in electric field between two conductive plates separated by dielectric. Measured in Farads. Applications: filtering, timing circuits, power factor correction, energy storage. Inductor stores energy in magnetic field; resistor dissipates energy as heat; transformer transfers energy between circuits via electromagnetic induction.
Which principle of Responsible AI ensures that AI system decisions can be understood and explained to users?
- Fairness
- Accountability
- Transparency
- Privacy
Answer: Transparency
Transparency (Explainable AI/XAI) ensures AI decisions are interpretable by humans, enabling trust, debugging, and regulatory compliance. Techniques: LIME, SHAP, attention visualization. Critical in high-stakes domains: healthcare diagnosis, loan approvals, criminal justice. Balances model complexity with interpretability needs.
Which spectrum band was first auctioned for 5G services in India?
- 700 MHz
- 3.3-3.67 GHz
- 24.25-28.5 GHz
- All of these
Answer: All of these
India's first 5G spectrum auction (2022) included low-band (700 MHz for coverage), mid-band (3.3-3.67 GHz for capacity/coverage balance), and high-band/mmWave (24.25-28.5 GHz for ultra-high speeds in dense areas). Operators strategically bid based on use cases: rural coverage vs urban capacity vs industrial applications.
Which operator is used to check equality of values in most programming languages?
- =
- ==
- ===
- :=
Answer: ==
Double equals (==) checks value equality in C, Java, Python, JavaScript. Single equals (=) is assignment operator. Triple equals (===) in JavaScript checks value AND type equality. := is assignment in Pascal/Go. Understanding operator precedence and type coercion is crucial for writing correct conditional logic in exams and real code.
Which RBI initiative allows regulated entities to test innovative fintech products in a controlled environment?
- RegTech
- Suptech
- Regulatory Sandbox
- Digital Lending Guidelines
Answer: Regulatory Sandbox
RBI Regulatory Sandbox enables fintech startups and banks to test new products/services with real customers under relaxed regulations for limited period/time/scale. Reduces time-to-market, fosters innovation while managing risks. Themes include retail payments, KYC, lending, cybersecurity. Successful pilots may lead to regulatory framework updates.