Data Science Data Science Trivia Question and Answers 2 — Questions and Answers
Question 1: What does the acronym 'ETL' stand for in data engineering?
- Extract, Transform, Load (Correct answer)
- Evaluate, Test, Learn
- Enter, Tabulate, Log
- Export, Transfer, Link
Correct 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.
Question 2: Which Python library is primarily used for creating static, animated, and interactive visualizations?
- Matplotlib (Correct answer)
- NumPy
- SciPy
- Requests
Correct answer: Matplotlib
Matplotlib is the foundational Python plotting library used to create a wide range of static, animated, and interactive visualizations.
Question 3: What type of machine learning algorithm is K-Means?
- Unsupervised clustering (Correct answer)
- Supervised classification
- Reinforcement learning
- Semi-supervised regression
Correct 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.
Question 4: In statistics, what does a p-value less than 0.05 typically indicate?
- The result is statistically significant (Correct answer)
- The null hypothesis is proven true
- The sample size is too small
- The data has no variance
Correct 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.
Question 5: What is the purpose of cross-validation in model evaluation?
- To assess how well a model generalizes to unseen data (Correct answer)
- To increase the training dataset size
- To remove outliers from the dataset
- To select the best programming language for modeling
Correct 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.
Question 6: Which measure of central tendency is most resistant to outliers?
- Median (Correct answer)
- Mean
- Mode
- Range
Correct 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.
Data Science Data Science Trivia Question and Answers 2
What does the acronym 'ETL' stand for in data engineering?