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Which SQL keyword is used to combine rows from two or more tables based on related columns?
- UNION
- JOIN
- MERGE
- COMBINE
Answer: JOIN
JOIN combines rows from multiple tables using related columns (usually primary/foreign keys). Types: INNER JOIN (matching rows), LEFT/RIGHT JOIN (all rows from one side), FULL OUTER JOIN (all rows). Essential for normalized database queries retrieving related data across tables.
The technology that allows a single physical server to run multiple isolated operating systems is called ________.
Answer: Virtualization
Virtualization uses hypervisor software to create multiple virtual machines (VMs) on one physical server, each running independent OS. Improves resource utilization, enables testing, disaster recovery, and cloud infrastructure. Types: full virtualization, para-virtualization, containerization (Docker).
Which practice helps prevent unauthorized access to Wi-Fi networks?
- Using default password
- Disabling SSID broadcast
- WEP encryption
- Open network
Answer: Disabling SSID broadcast
Disabling SSID broadcast hides network name from public scans, adding obscurity layer. However, strong security requires WPA3 encryption, complex password, MAC filtering, and regular firmware updates. WEP is broken; default passwords are easily guessable; open networks offer no protection.
A static IP address never changes, while a dynamic IP address can change periodically.
- True
- False
Answer: True
Static IP is manually configured and remains constant, used for servers, printers, remote access. Dynamic IP is assigned by DHCP server and may change on reboot/lease expiry, typical for home users. Static IPs cost more but provide reliability for services requiring consistent addressing.
Which UPI feature allows recurring payments for subscriptions?
- UPI Lite
- UPI AutoPay
- UPI International
- UPI QR
Answer: UPI AutoPay
UPI AutoPay enables mandate-based recurring payments for subscriptions (OTT, utilities, mutual funds). Users set amount, frequency, and validity; payments execute automatically without manual intervention each time. Enhances convenience while maintaining security with transaction limits and notifications.
The shortcut key to refresh a webpage in most browsers is ________.
Answer: F5 or Ctrl+R
F5 or Ctrl+R refreshes/reloads the current webpage to fetch latest content from server. Ctrl+F5 performs hard refresh bypassing cache. These shortcuts improve productivity when checking for updated information or troubleshooting loading issues.
Which technology enables real-time language translation in video calls?
- OCR
- NLP
- Speech Synthesis
- All of these
Answer: All of these
Real-time translation combines: Speech Recognition (audio to text), NLP (translation between languages), and Speech Synthesis (text to audio). Advanced systems also use context understanding and lip-sync for natural output. Used in global collaboration tools and accessibility features.
Chandrayaan-3's lander was named 'Vikram' after Dr. Vikram Sarabhai.
- True
- False
Answer: True
Vikram lander (Chandrayaan-3) honors Dr. Vikram Sarabhai, father of India's space program. The rover was named 'Pragyan' (wisdom). Successful landing on Aug 23, 2023 made India the 4th nation to soft-land on Moon and first near south pole.
Which encryption standard is recommended by NIST for securing classified information?
- DES
- 3DES
- AES-256
- RC4
Answer: AES-256
AES-256 (Advanced Encryption Standard with 256-bit key) is approved by NIST for top-secret information. Provides strong security against brute-force attacks. DES/3DES are deprecated; RC4 has known vulnerabilities. AES is efficient in both hardware and software implementations.
The mobile app for booking LPG cylinders under Digital India is called ________.
Answer: PAHAL/MyLPG
PAHAL (Pratyaksh Hanstantrit Labh) is the DBT scheme for LPG subsidies, accessible via MyLPG app. Enables direct subsidy transfer to bank accounts, reducing leakage and ensuring benefits reach genuine beneficiaries.
The Indian initiative for promoting electric vehicle adoption through subsidies is called ________ India.
Answer: FAME
FAME provides demand incentives for EVs and charging infrastructure. Phase-II focuses on public transport and shared mobility.
Which technology identifies compromised accounts by analyzing login patterns and behaviors?
- UEBA
- SIEM
- EDR
- All of these
Answer: UEBA
UEBA uses ML to establish behavioral baselines and detect anomalies indicating compromised accounts or insider threats.
The technique that enables LLMs to reason about visual inputs by combining vision and language models is called ________ Learning.
Answer: Multimodal
Multimodal models (CLIP, LLaVA) process text, images, audio jointly, enabling visual question answering, image captioning, and cross-modal retrieval.
Which technique enables LLMs to generate code by learning from programming language corpora?
- Fine-tuning
- Code LLMs
- Prompt Engineering
- All of these
Answer: All of these
Code LLMs (Codex, CodeLlama) trained on code repositories enable natural language to code generation. Combined with fine-tuning and prompt engineering for developer productivity tools.
Blockchain provides immutable records for end-to-end supply chain visibility.
- True
- False
Answer: True
Transparent tracking from origin to consumer.
e₹ retail variant enables public transactions via mobile wallets.
- True
- False
Answer: True
P2P/P2M transactions with QR codes, offline mode.
DAC captures CO2 from ambient air for carbon removal.
- True
- False
Answer: True
Critical for net-zero pathways and climate mitigation.
NavIC provides positioning accuracy better than 20m over ________.
Answer: India
Regional navigation satellite system with 7 satellites.
Model cards provide standardized documentation for accountable AI.
- True
- False
Answer: True
Intended use, training data, evaluation metrics, limitations.
Differential Privacy mathematically guarantees against re-identification.
- True
- False
Answer: True
Adds statistical noise to protect individuals in aggregate data.