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Trivia Flashcards

7 cards from real Data Science practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Trivia flashcards as text

  1. Which machine learning task predicts a continuous numeric output?

    Answer: Regression

    Regression models predict continuous values like price or temperature.

  2. What is the popular open-source library developed by Google for deep learning?

    Answer: TensorFlow

    TensorFlow is Google's framework for building neural networks.

  3. In a confusion matrix, what are correctly predicted positive cases called?

    Answer: True positives

    True positives are cases predicted positive that are actually positive.

  4. Which technique reduces the number of features while preserving variance?

    Answer: PCA

    Principal Component Analysis projects data onto fewer dimensions.

  5. What does overfitting mean in a machine learning model?

    Answer: It performs well on training data but poorly on new data

    Overfitting means the model memorizes training data and fails to generalize.

  6. Which Python library is the foundation for numerical array computing?

    Answer: NumPy

    NumPy provides efficient multidimensional array operations.

  7. What is the unsupervised task of grouping similar data points called?

    Answer: Clustering

    Clustering groups unlabeled data based on similarity.