WorksheetsQUIZ 2 DS
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Data security mainly focuses on:
a)
Storing data in a centralized location for easy access.
b)
Enhancing data retrieval speed and efficiency.
c)
Creating backups to prevent data loss.
d)
Protecting data from unauthorized access and ensuring its integrity.
2.
Which of the following is a data security issue?
a)
Network monitoring
b)
User authentication
c)
Data breaches
d)
Data encryption
3.
Data collected directly from surveys is called:
a)
Primary data
b)
Survey data
c)
Tertiary data
d)
Secondary data
4.
Which of the following is a secondary data source?
a)
Surveys
b)
Interviews
c)
Raw data sets
d)
Research articles
5.
The main purpose of data preprocessing is to:
a)
analyze data trends
b)
store data securely
c)
visualize data patterns
d)
prepare data for analysis
6.
Removing duplicate records is part of:
a)
Data aggregation
b)
Data cleaning
c)
Data transformation
d)
Data validation
7.
Noisy data refers to:
a)
data that is perfectly accurate and reliable
b)
data that is organized and well-structured
c)
data that is collected from verified sources
d)
data that contains errors, inconsistencies, or irrelevant information
8.
Removing duplicate records is part of:
a)
Data validation
b)
Data cleaning
c)
Data transformation
d)
Data aggregation
9.
EDA is mainly performed to:
a)
analyze data trends
b)
visualize data patterns
c)
store data securely
d)
gain insights from data
10.
Which plot is best for identifying outliers?
a)
Scatter plot
b)
Line graph
c)
Histogram
d)
Box plot
100 %
