Data Science Revision

Question 1

Who is primarily responsible for building machine learning models?

Accepted Answer

ML Engineer

Question 2

a single data point or an array of features is a?

Accepted Answer

vector

Question 3

data that can have decimals or fractions e.g: Height (172.5 cm), Temperature (36.6°C) are called?

Accepted Answer

Continous Data

Question 4

What is the role of statistics in Data Science

Accepted Answer

Analyzing and interpreting data

Question 5

Which of the following is NOT a component of Data Science

Accepted Answer

Web Design

Question 6

What is the square root of variance called?

Accepted Answer

Standard Deviation

Question 7

Which of the following is NOT a measure of central tendency?

Accepted Answer

Variance

Question 8

What does a Business Analyst do in Data Science?

Accepted Answer

Analyzes business trends and makes recommendations

Question 9

Which of these is a measure of dispersion?

Accepted Answer

Variance

Question 10

What does the 68-95-99.7 rule refer to

Accepted Answer

A rule for normal distributions

Question 11

What is the probability of flipping heads in a fair coin toss?

Accepted Answer

0.50

Question 12

What is the formula for the mean (average) of a dataset?

Accepted Answer

(Sum of values) ÷ (Number of values)

Question 13

What does a Normal Distribution look like?

Accepted Answer

Bell-shaped

Question 14

Which role focuses on designing and maintaining large-scale data pipelines?

Accepted Answer

Data Engineer

Question 15

Which of these is a discrete probability distribution

Accepted Answer

Poisson Distribution

Question 16

What is Big Data

Accepted Answer

Large, complex datasets that are difficult to process

Question 17

What kind of Data is Time of the day in a 12-hour clock: 1 PM, 4 AM, 9 PM?

Accepted Answer

Interval

Question 18

What is the primary goal of Data Science?

Accepted Answer

Extract insights from data

Question 19

Which measure of central tendency is least affected by outliers?

Accepted Answer

Median

Question 20

Which tool is commonly used for Data Science?

Accepted Answer

Python

Question 21

Which theorem helps in updating probabilities with new evidence?

Accepted Answer

Bayes' Theorem

Question 22

Which step comes first in a Data Science project?

Accepted Answer

Data collection

Questions 22