Quick Revision

GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

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Computer Fundamentals → Introduction to Computer 38

AWS CloudFront is?
CDN service
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AWS ELB (Elastic Load Balancer) types include?
ALB, NLB, CLB (Application, Network, Classic)
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Auto Scaling in cloud automatically?
Adjusts compute capacity based on demand
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VPC (Virtual Private Cloud) provides?
Isolated private network section within cloud provider infrastructure
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Security Group in AWS acts as?
Stateful virtual firewall for EC2 instances
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AWS IAM (Identity and Access Management) manages?
User identities, permissions, and access to AWS resources
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Principle of Least Privilege in IAM?
Grant only minimum permissions required for the task
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AWS ARN (Amazon Resource Name) uniquely identifies?
Any AWS resource globally
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Which service provides managed Kubernetes in AWS?
EKS
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Which service provides managed containers (without K8s) in AWS?
ECS (Elastic Container Service)
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AWS Fargate is?
Serverless compute engine for containers (no server management)
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Blockchain consensus mechanism Proof of Work (PoW) requires?
Computational work (solving cryptographic puzzle) to add a block
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Proof of Stake (PoS) selects validators based on?
Amount of cryptocurrency staked as collateral
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Smart contract is?
Self-executing code on blockchain triggered by predefined conditions
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Ethereum's smart contracts are written in?
Solidity
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NFT (Non-Fungible Token) represents?
Unique, non-interchangeable digital asset with ownership record on blockchain
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DeFi (Decentralized Finance) uses?
Blockchain-based financial services without intermediaries
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Metaverse refers to?
Persistent, interconnected virtual worlds with economic activity
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Edge computing processes data?
Near the source of data generation (IoT devices, local servers)
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Fog computing is?
Intermediate layer between edge devices and cloud — extends cloud to network edge
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5G network slicing allows?
Multiple virtual networks tailored for different use cases on same infrastructure
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eMBB in 5G stands for?
Enhanced Mobile Broadband — high speed for video/browsing
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URLLC in 5G stands for?
Ultra Reliable Low Latency Communications
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mMTC in 5G stands for?
Massive Machine Type Communications — IoT devices
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LiFi technology uses?
Visible light for high-speed wireless data transmission
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Quantum supremacy was claimed by Google in?
2019
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Quantum entanglement means?
Measurement of one particle instantly affects its entangled partner regardless of distance
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Quantum gate equivalent in classical computing is?
Logic gate (AND, OR, NOT)
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Shor's algorithm on quantum computer can?
Factor large integers exponentially faster — threatening RSA encryption
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Grover's algorithm provides?
Quadratic speedup for unstructured search (O(√n) vs O(n))
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Post-quantum cryptography aims to?
Develop algorithms resistant to quantum computer attacks
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Which post-quantum algorithm was selected by NIST in 2022?
CRYSTALS-Kyber and CRYSTALS-Dilithium
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Digital twin is?
Virtual replica of physical system for simulation and monitoring
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SCADA systems are used in?
Industrial control systems (power grids, water, manufacturing)
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ICS (Industrial Control System) security is critical because?
Attacks can cause physical harm and infrastructure failures
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GDPR applies to?
Any organization processing EU residents' personal data
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Right to erasure (GDPR Article 17) means?
Individuals can request their personal data be deleted
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Data minimization principle in GDPR?
Collect only minimum personal data necessary for the specific purpose
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Computer Fundamentals → Memory Units 1

OT (Operational Technology) differs from IT in?
Controls physical processes and equipment directly
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Computer Fundamentals → Computer Security 1

Stuxnet malware was notable for?
Targeting industrial SCADA/ICS systems (Iranian nuclear centrifuges)
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