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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 37

SATA III maximum speed is?
600 MB/s
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The first computer bug was?
An actual insect found in a relay
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Gosling's Java 'JVM' stands for?
Java Virtual Machine
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Bytecode in Java is?
Intermediate code executed by JVM
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IDE in programming stands for?
Integrated Development Environment
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Git is used for?
Version control
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GitHub is?
Cloud-based Git repository hosting service
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Agile methodology is?
Iterative and incremental development
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SDLC stands for?
Software Development Life Cycle
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Which SDLC phase comes first?
Requirements analysis
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Alpha testing is done by?
Internal testers within organization
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Beta testing is done by?
External real users
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Which testing checks if system meets requirements?
System testing
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Regression testing ensures?
Old features still work after changes
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Which data structure is used for breadth-first search (BFS)?
Queue
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Which data structure is used for depth-first search (DFS)?
Stack
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Time complexity of linear search is?
O(n)
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Hash table provides average time complexity of?
O(1)
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Heap data structure is used for?
Priority queue implementation
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In a max-heap, the root is?
Largest element
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Graph with no cycles is called?
Tree/DAG
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Which sorting algorithm is best for nearly sorted arrays?
Insertion sort
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Bubble sort worst-case complexity is?
O(n²)
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Which algorithm follows divide and conquer?
Merge sort
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Dynamic programming solves problems by?
Storing solutions to subproblems (memoization)
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Greedy algorithm?
Makes locally optimal choices at each step
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P in P vs NP complexity theory stands for?
Polynomial time solvable
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NP in P vs NP stands for?
Nondeterministic Polynomial
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Turing machine was proposed by?
Alan Turing
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Information Theory was founded by?
Claude Shannon
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What does 'open source' mean for software?
Source code is publicly available
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Which is an example of cloud storage?
Google Drive
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SaaS example is?
Google Workspace (Docs)
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Which is an example of IaaS?
Amazon EC2
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PaaS example is?
Microsoft Azure App Service
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A digital certificate is issued by?
Certificate Authority (CA)
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Two-factor authentication (2FA) uses?
Something you know + something you have/are
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Computer Fundamentals → Output Devices 1

Which type of monitor is thinnest?
OLED
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Computer Fundamentals → Software and Hardware 1

A compiler is to compilation as interpreter is to?
Execution line by line
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Computer Fundamentals → Internet Basics 1

Which protocol secures email transmission?
SMTPS/STARTTLS
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