Data Science MCQs with answers Page - 20

Here, you will find a collection of MCQ questions on Data Science. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Which of the following is NOT a common source of data for data collection in Data Science?

  • (A) Social Media
  • (B) Sensor Data
  • (C) Print Media
  • (D) Customer Surveys

A

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Q. In data collection, what is the term for the process of recording data in its original form without any changes?

  • (A) Data Integration
  • (B) Data Transformation
  • (C) Data Aggregation
  • (D) Raw Data Collection

A

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Q. Which of the following is a type of structured data that is organized in rows and columns, similar to a spreadsheet?

  • (A) CSV
  • (B) JSON
  • (C) XML
  • (D) Unstructured Text Data

A

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Q. What is the process of cleaning and formatting raw data into a usable format called?

  • (A) Data Visualization
  • (B) Data Integration
  • (C) Data Cleaning
  • (D) Data Extraction

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Q. Which of the following is a technique used to handle missing data by filling in the missing values with estimated data?

  • (A) Data Normalization
  • (B) Data Imputation
  • (C) Data Transformation
  • (D) Data Encoding

A

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Q. What does the acronym "API" stand for in the context of data collection and retrieval?

  • (A) Application Programming Interface
  • (B) Advanced Protocol Interface
  • (C) Automated Process Integration
  • (D) Analytical Program Interaction

A

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Q. Which method of data collection involves systematically observing and recording data without interfering with the subjects?

  • (A) Surveys
  • (B) Interviews
  • (C) Experiments
  • (D) Observational Studies

A

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Q. What is the term for the process of reducing the size of a dataset while retaining its essential characteristics?

  • (A) Data Wrangling
  • (B) Data Reduction
  • (C) Data Sampling
  • (D) Data Cleaning

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Q. Which of the following is a common technique used to preprocess text data, involving the removal of common words?

  • (A) Data Stemming
  • (B) Data Tokenization
  • (C) Data Parsing
  • (D) Data Stopword Removal

A

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Q. What is the primary purpose of a pair plot in EDA?

  • (A) To display relationships between variables
  • (B) To visualize the distribution of data
  • (C) To identify missing values
  • (D) To calculate summary statistics

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