Data Modeling MCQ Questions and Answers

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In data modeling, what is the term for the process of selecting relevant features or attributes for a specific task?

A) Data Aggregation B) Data Cleaning C) Feature Selection D) Data Transformation

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Answer & Solution

Answer: Option C

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Which data modeling approach is primarily used for representing data as a collection of rules and facts in a knowledge base?

A) Relational Modeling B) Bayesian Network Modeling C) Object-Oriented Modeling D) Entity-Relationship Modeling

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Answer: Option B

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What is the primary purpose of a data cube in data modeling?

A) To visualize the data distribution B) To represent multi-dimensional data C) To define data attributes and properties D) To calculate summary statistics

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Answer & Solution

Answer: Option B

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In data modeling, what is the term for the process of converting categorical data into numerical format for modeling purposes?

A) Data Aggregation B) Data Cleaning C) Data Encoding D) Data Transformation

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Answer & Solution

Answer: Option C

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What is the primary goal of dimensionality reduction techniques in data modeling?

A) To increase model complexity B) To improve model accuracy C) To reduce dimensionality D) To calculate summary statistics

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Answer & Solution

Answer: Option C

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In data modeling, what is the term for the process of selecting a subset of data for model training and testing?

A) Data Sampling B) Data Cleaning C) Feature Engineering D) Data Transformation

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Answer & Solution

Answer: Option A

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Which data modeling approach is commonly used for representing data as a collection of interconnected nodes in a graph?

A) Relational Modeling B) Bayesian Network Modeling C) Graph Database Modeling D) Entity-Relationship Modeling

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Answer & Solution

Answer: Option C

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What is the primary purpose of a Bayesian Network in data modeling?

A) To represent the structure of a database B) To predict probabilities C) To visualize data relationships D) To calculate summary statistics

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Answer & Solution

Answer: Option B

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In data modeling, what is the term for the process of aggregating and summarizing data at different levels of granularity?

A) Data Aggregation B) Data Cleaning C) Data Sampling D) Data Transformation

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Answer & Solution

Answer: Option A

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What is the primary goal of regression analysis in data modeling?

A) To group similar data points B) To predict numerical values C) To improve model accuracy D) To calculate summary statistics

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Answer & Solution

Answer: Option B

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Data Modeling MCQ Questions and Answers | Data Science MCQs