Data Science Questions and Answers – Basics of Data Science

This set of Data Science Multiple Choice Questions & Answers (MCQs) focuses on “Basics of Data Science”.

1. Which of the following would be more appropriate to be replaced with question mark in the following figure?
Data Science is multidisciplinary involving extraction of knowledge from large volumes
a) Data Analysis
b) Data Science
c) Descriptive Analytics
d) None of the mentioned
View Answer

Answer: b
Explanation: Data Science is a multidisciplinary which involves extraction of knowledge from large volumes of data that are structured or unstructured.

2. Point out the correct statement.
a) Raw data is original source of data
b) Preprocessed data is original source of data
c) Raw data is the data obtained after processing steps
d) None of the mentioned
View Answer

Answer: a
Explanation: Accounting programs are prototypical examples of data processing applications.

3. Which of the following is performed by Data Scientist?
a) Define the question
b) Create reproducible code
c) Challenge results
d) All of the mentioned
View Answer

Answer: d
Explanation: A data scientist is a job title for an employee or business intelligence (BI) consultant who excels at analyzing data, particularly large amounts of data.
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4. Which of the following is the most important language for Data Science?
a) Java
b) Ruby
c) R
d) None of the mentioned
View Answer

Answer: c
Explanation: R is free software for statistical computing and analysis.

5. Point out the wrong statement.
a) Merging concerns combining datasets on the same observations to produce a result with more variables
b) Data visualization is the organization of information according to preset specifications
c) Subsetting can be used to select and exclude variables and observations
d) All of the mentioned
View Answer

Answer: b
Explanation: Data formatting is the organization of information according to preset specifications.

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6. Which of the following approach should be used to ask Data Analysis question?
a) Find only one solution for particular problem
b) Find out the question which is to be answered
c) Find out answer from dataset without asking question
d) None of the mentioned
View Answer

Answer: b
Explanation: Data analysis has multiple facets and approaches.

7. Which of the following is one of the key data science skills?
a) Statistics
b) Machine Learning
c) Data Visualization
d) All of the mentioned
View Answer

Answer: d
Explanation: Data visualization is the presentation of data in a pictorial or graphical format.

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8. Which of the following is a key characteristic of a hacker?
a) Afraid to say they don’t know the answer
b) Willing to find answers on their own
c) Not Willing to find answers on their own
d) All of the mentioned
View Answer

Answer: b
Explanation: Hacker is an expert at programming and solving problems with a computer.

9. Which of the following is characteristic of Processed Data?
a) Data is not ready for analysis
b) All steps should be noted
c) Hard to use for data analysis
d) None of the mentioned
View Answer

Answer: b
Explanation: Processing includes merging, summarizing and subsetting data.

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10. Raw data should be processed only one time.
a) True
b) False
View Answer

Answer: b
Explanation: Raw data may only need to be processed once.

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Here’s the list of Best Books in Data Science.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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