Data Science MCQs with answers Page - 27

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Q. Which data modeling approach represents data as a collection of attributes and their dependencies in a directed acyclic graph?

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

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Q. In data modeling, what is the term for the process of transforming data into a format suitable for storage and retrieval?

  • (A) Data Aggregation
  • (B) Data Wrangling
  • (C) Data Encoding
  • (D) Data Integration

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Q. What is the primary goal of clustering in data modeling?

  • (A) To increase model complexity
  • (B) To group similar data points
  • (C) To improve model accuracy
  • (D) To calculate summary statistics

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Q. In data modeling, what is the term for the process of reducing the dimensionality of data while preserving its important features?

  • (A) Data Imputation
  • (B) Data Reduction
  • (C) Feature Engineering
  • (D) Data Normalization

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Q. What is the primary purpose of a data pipeline in data modeling?

  • (A) To visualize data relationships
  • (B) To prepare and transform data for analysis
  • (C) To define data attributes and properties
  • (D) To calculate summary statistics

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Q. Which data modeling approach is commonly used for representing data as a collection of items with association rules?

  • (A) Relational Modeling
  • (B) Bayesian Network Modeling
  • (C) Association Rule Modeling
  • (D) Entity-Relationship Modeling

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Q. In data modeling, what is the term for the process of selecting and combining data from multiple sources for analysis?

  • (A) Data Aggregation
  • (B) Data Integration
  • (C) Data Sampling
  • (D) Data Transformation

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Q. What is the primary purpose of a data schema in data modeling?

  • (A) To store and manage data for a specific task
  • (B) To visualize data relationships
  • (C) To define data attributes and properties
  • (D) To calculate summary statistics

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Q. 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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Q. 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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