Data Science Trivia Question and Answers Flashcards
6 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 6 Data Science Trivia Question and Answers flashcards as text
What does the acronym 'ETL' stand for in data engineering?
Answer: Extract, Transform, Load
ETL stands for Extract, Transform, Load, which describes the process of pulling data from sources, transforming it into a usable format, and loading it into a destination system.
Which Python library is primarily used for creating static, animated, and interactive visualizations?
Answer: Matplotlib
Matplotlib is the foundational Python plotting library used to create a wide range of static, animated, and interactive visualizations.
What type of machine learning algorithm is K-Means?
Answer: Unsupervised clustering
K-Means is an unsupervised clustering algorithm that partitions data into K distinct groups based on feature similarity without using labeled outcomes.
In statistics, what does a p-value less than 0.05 typically indicate?
Answer: The result is statistically significant
A p-value below 0.05 conventionally indicates that the observed result is statistically significant, meaning there is less than a 5% probability it occurred by chance alone.
What is the purpose of cross-validation in model evaluation?
Answer: To assess how well a model generalizes to unseen data
Cross-validation splits data into multiple folds to train and test a model repeatedly, providing a reliable estimate of how it will perform on new, unseen data.
Which measure of central tendency is most resistant to outliers?
Answer: Median
The median is the middle value in an ordered dataset and is not affected by extremely high or low values, making it the most resistant to outliers.