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Data Science MCQs with answers Page - 178

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Mr. Dubey • 51.17K Points
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Q. What does the term "overfitting" mean in machine learning?

(A) The model fits the training data too closely and performs poorly on new data
(B) The model generalizes well to new data
(C) The model is too simple and underperforms on the training data
(D) The model is perfectly accurate on all data

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Mr. Dubey • 51.17K Points
Coach

Q. In the CRISP-DM data mining process model, what does "DM" stand for?

(A) Data Modeling
(B) Data Mining
(C) Data Manipulation
(D) Data Modeling

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Mr. Dubey • 51.17K Points
Coach

Q. Which Python library is commonly used for natural language processing tasks such as text tokenization and language understanding?

(A) Matplotlib
(B) Scikit-learn
(C) spaCy
(D) Seaborn

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Mr. Dubey • 51.17K Points
Coach

Q. What is the primary goal of exploratory data analysis (EDA)?

(A) To build predictive models
(B) To create visualizations
(C) To collect more data
(D) To understand the data's underlying structure and patterns

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Mr. Dubey • 51.17K Points
Coach

Q. What does the term "cross-validation" refer to in machine learning?

(A) A technique for assessing a model's performance on unseen data
(B) A method for finding optimal hyperparameters
(C) A type of ensemble learning method
(D) A way to preprocess data

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Mr. Dubey • 51.17K Points
Coach

Q. What is the main purpose of the K-means clustering algorithm?

(A) To reduce dimensionality
(B) To classify data into categories
(C) To perform regression analysis
(D) To group data points into clusters based on similarity

M

Mr. Dubey • 51.17K Points
Coach

Q. Which data visualization technique is suitable for displaying the distribution of a single numerical variable?

(A) Scatter plot
(B) Box plot
(C) Histogram
(D) Bar chart

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Mr. Dubey • 51.17K Points
Coach

Q. What does the acronym "SQL" stand for in the context of databases?

(A) System Query Language
(B) Structured Query Language
(C) Structured Question Language
(D) System Query Language

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