1
Analytics is the process of
Correct Answer
examining data to discover useful patterns and draw conclusions
☑ MCQ PRACTICE
Data Analytics Unit 2
Practice objective questions for quick revision and examination preparation. Try answering each question before revealing the answer.
Data Analytics - Unit-2
2
Which type of analytics answers the question 'What happened?'
Correct Answer
Descriptive analytics
3
Which type of analytics answers 'What is likely to happen?'
Correct Answer
Predictive analytics
4
Which type of analytics recommends 'What should we do?'
Correct Answer
Prescriptive analytics
5
Diagnostic analytics tries to find out
Correct Answer
why something happened
6
Which of the following is an open-source language widely used for statistical analysis?
Correct Answer
R
7
Which Python library is widely used for data manipulation and analysis?
Correct Answer
pandas
8
Gender and colour are examples of
Correct Answer
nominal variables
9
Ratings such as low, medium and high are
Correct Answer
ordinal variables
10
Which measurement scale has a true zero point?
Correct Answer
Ratio scale
11
A categorical variable
Correct Answer
takes values from a limited set of categories
12
Which of the following is a continuous variable?
Correct Answer
Height of a person
13
Which of the following is a discrete variable?
Correct Answer
Number of customers
14
In modeling, the dependent variable is
Correct Answer
the outcome that is being predicted
15
In modeling, an independent variable is
Correct Answer
a predictor used to explain the outcome
16
Business modeling is used to
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represent business processes and data to support decision making
17
Median imputation is preferred over mean imputation when the data
Correct Answer
is skewed or has outliers
18
KNN imputation fills a missing value using
Correct Answer
the values of the nearest neighbouring records
19
The three levels of data models are
Correct Answer
conceptual, logical and physical
20
A relational database stores data in
Correct Answer
tables of rows and columns
21
Which of the following is a NoSQL database?
Correct Answer
MongoDB
22
SQL stands for
Correct Answer
Structured Query Language
23
The first phase of the CRISP-DM process is
Correct Answer
business understanding
24
Predictive modeling uses
Correct Answer
historical data to forecast future outcomes
25
Which of the following is an application of modeling in business?
Correct Answer
Predicting customer churn
Fill in the Blanks
26
Analytics that explains 'what happened' is called __________ analytics.
Correct Answer
descriptive
27
__________ analytics predicts what is likely to happen in the future.
Correct Answer
Predictive
28
__________ analytics recommends the actions that should be taken.
Correct Answer
Prescriptive
29
__________ is an open-source language widely used for statistical computing and graphics.
Correct Answer
R
30
__________ is a Python library used for data manipulation and analysis.
Correct Answer
pandas
31
A variable whose categories have no natural order is called a __________ variable.
Correct Answer
nominal
32
Ratings such as low, medium and high are __________ variables.
Correct Answer
ordinal
33
The __________ scale of measurement has a true zero point.
Correct Answer
ratio
34
The variable that is being predicted is called the __________ variable.
Correct Answer
dependent
35
A variable used to predict the outcome is called the __________ variable.
Correct Answer
independent
36
SQL stands for Structured __________ Language.
Correct Answer
Query
37
Replacing missing values with the average of the column is called __________ imputation.
Correct Answer
mean
38
CRISP-DM stands for Cross-Industry __________ Process for Data Mining.
Correct Answer
Standard
39
The number of customers is a __________ variable because it takes whole-number values.
Correct Answer
discrete
40
Conceptual, logical and physical are the three levels of a data __________.
Correct Answer
model