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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 38

The term 'Artificial Intelligence' was coined by?
John McCarthy at Dartmouth Conference in 1956
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ChatGPT was launched publicly in?
November 2022
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Which company developed the GPT series of language models?
OpenAI
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Gemini AI is developed by?
Google DeepMind
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Bluetooth is named after?
Harald Bluetooth — 10th century Danish king who united tribes
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Wi-Fi stands for?
It's not an acronym — it's a brand name by Wi-Fi Alliance
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Which programming language is used for iOS development?
Swift (and Objective-C)
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Kotlin is the preferred language for?
Android development (Google's official preferred language since 2017)
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Flutter framework uses which programming language?
Dart
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React Native is used for?
Cross-platform mobile app development using JavaScript/React
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Which IDE is most popular for Python development?
PyCharm / VS Code
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IntelliJ IDEA is primarily used for?
Java development (and Kotlin, Scala, Groovy)
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Which VCS command stages files for commit in Git?
git add
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Which Git command downloads remote repository changes?
git fetch / git pull
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git clone does?
Creates local copy of a remote repository
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Which git command shows commit history?
git log
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git stash is used to?
Temporarily save uncommitted changes to work on something else
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What is a git branch?
An independent line of development that diverges from the main codebase
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git merge combines?
Changes from different branches into the current branch
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git rebase vs git merge?
Rebase rewrites history creating linear commits; merge preserves branch history with merge commit
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GitHub Actions is used for?
CI/CD automation — automated workflows triggered by repository events
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Which GitHub feature allows code review before merging?
Pull Request (PR) / Merge Request (MR)
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Agile Sprint is?
Fixed time iteration (1-4 weeks) for completing planned work items
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Scrum Master role is?
Facilitates Scrum process, removes impediments, serves the team
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User Story in Agile is?
Brief description of feature from end user perspective (As a... I want... So that...)
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Sprint Retrospective is?
Team meeting after sprint to discuss what went well, what to improve
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Kanban board visualizes?
Workflow with columns (To Do, In Progress, Done) for task management
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WIP limit in Kanban?
Restricts number of items in each workflow stage to prevent overload
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Technical debt in software refers to?
Cost of shortcuts and poor design choices that need future rework
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Code refactoring means?
Improving code structure without changing external behavior
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Pair programming involves?
Two developers working together at one workstation simultaneously
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Code review benefits include?
Catching bugs early, knowledge sharing, and improving code quality
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API versioning strategies include?
URL path (/v1/), header, and query parameter versioning
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Webhook vs polling: webhook?
Server pushes data to client URL when event occurs — more efficient
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Which HTTP status code indicates 'Created' (after POST)?
201
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HTTP 204 No Content means?
Request succeeded but there is no content to return in response body
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GraphQL advantages over REST?
Single endpoint, client specifies exact data needed — no over/under-fetching
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gRPC compared to REST?
Faster — uses HTTP/2 + Protocol Buffers binary serialization for efficiency
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Computer Fundamentals → Input Devices 1

The first computer mouse was invented by?
Douglas Engelbart in 1963/1964
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Computer Fundamentals → Internet Basics 1

Internet of Things (IoT) refers to?
Network of physical devices with sensors connected to internet
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