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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 40

3NF removes?
Transitive dependencies
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Which type of join returns only matching rows?
INNER JOIN
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Which HTTP status code indicates unauthorized access?
401
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HTTP 403 means?
Forbidden (authenticated but no permission)
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Port 3306 is associated with?
MySQL database
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Which of the following is a graph database?
Neo4j
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Redis is primarily used as?
In-memory key-value store/cache
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Cassandra is which type of database?
Wide-column NoSQL
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Which language is used for data analysis and statistics?
R
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Which Python library is used for data analysis?
Pandas
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Which Python library is used for machine learning?
Scikit-learn
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TensorFlow is used for?
Deep learning and neural networks
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Which layer in neural network processes input?
Input layer
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Activation function in neural networks?
Introduces non-linearity
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Backpropagation is used to?
Adjust weights by propagating error backward
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Overfitting in machine learning means?
Model memorizes training data, fails on new data
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Regularization techniques prevent?
Overfitting
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Which is supervised learning?
Linear regression
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Which is unsupervised learning?
K-means clustering
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Reinforcement learning learns by?
Trial and error with rewards
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CNN in deep learning stands for?
Convolutional Neural Network
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RNN stands for?
Recurrent Neural Network
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NLP stands for?
Natural Language Processing
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Which company developed ChatGPT?
OpenAI
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LLM in AI stands for?
Large Language Model
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GPS stands for?
Global Positioning System
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How many satellites are needed for GPS positioning?
4+
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QR code stands for?
Quick Response code
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NFC stands for?
Near Field Communication
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RFID stands for?
Radio Frequency Identification
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USB Type-C connector is?
Symmetrical/reversible
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Thunderbolt 4 maximum speed is?
40 Gbps
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Which of the following is a lossless compression format?
PNG
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JPEG uses which type of compression?
Lossy
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MP3 is a compressed format for?
Audio
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Which video format is most widely supported?
MP4
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PDF was developed by?
Adobe Systems
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Which file format is used for vector graphics?
SVG
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BMP stands for?
Bitmap
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GIF supports?
Only 256 colors
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