MCQs — Data and Analysis

Practice questions for Computer Science.

Question 21

An online store finds that customers who buy laptops often also buy laptop bags. This discovery is an example of:

A. Data entry
B. Data backup
C. Data formatting
D. Data mining
Question 22

A hospital wants to show monthly patient numbers using bars and lines. Which technique should it use?

A. Data encryption
B. Data deletion
C. Data visualization
D. Data compression
Question 23

Which task needs machine learning rather than fixed rules?

A. Recognising handwritten digits automatically
B. Adding two numbers
C. Printing a document
D. Saving a file
Question 24

Ali collects test scores and compares the class averages to find the hardest subject. Which field is he mainly using?

A. Cryptography
B. Statistics
C. Networking
D. Animation
Question 25

Data with categories that have no natural order, such as blood group or eye colour, is:

A. Ordinal data
B. Interval data
C. Ratio data
D. Nominal data
Question 26

Categorical data with a meaningful order or rank, such as small, medium and large, is:

A. Ordinal data
B. Nominal data
C. Discrete data
D. Continuous data
Question 27

Numerical data that can only take countable whole values, such as the number of students, is:

A. Continuous data
B. Discrete data
C. Nominal data
D. Ordinal data
Question 28

Numerical data that can take any value within a range, including decimals, such as height or weight, is:

A. Discrete data
B. Nominal data
C. Continuous data
D. Ordinal data
Question 29

Which data type has equal intervals between values but no true zero point?

A. Interval data
B. Ratio data
C. Nominal data
D. Ordinal data
Question 30

Which data type has equal intervals and a true zero point?

A. Nominal data
B. Ordinal data
C. Interval data
D. Ratio data
Question 31

Data collected first-hand by the researcher for a specific purpose is called:

A. Secondary data
B. Historical data
C. Primary data
D. Copied data
Question 32

Data that was collected earlier by someone else and is reused, such as government reports, is:

A. Primary data
B. Secondary data
C. Raw data
D. Original data
Question 33

An organised collection of data stored electronically for easy access, management and updating is a:

A. Compiler
B. Web browser
C. Database
D. Antivirus
Question 34

How does ordinal data differ from nominal data?

A. Ordinal data is always decimal
B. Ordinal categories have a meaningful order; nominal categories do not
C. Nominal data is always numeric
D. There is no difference between them
Question 35

What is the key difference between discrete and continuous data?

A. Discrete data is countable, whereas continuous data can be measured with fractions
B. Discrete data is text, whereas continuous data is images
C. Continuous data can never be measured
D. Discrete data always contains decimals
Question 36

Why is temperature in °C interval data rather than ratio data?

A. It is measured in words
B. It has no equal intervals
C. It cannot be measured
D. It has no true zero, so 0°C does not mean no temperature
Question 37

How does a dataset differ from a database?

A. A dataset is a collection of data for analysis; a database is a system for storing and managing data
B. Both terms mean exactly the same thing
C. A database can hold only one value
D. A dataset cannot contain numbers
Question 38

Why is primary data often more suitable for a specific study?

A. It is always cheaper to collect
B. It never contains errors
C. It needs no time to collect
D. It is collected for that exact purpose, so the researcher controls its quality
Question 39

What is one advantage of secondary data?

A. It is always fully accurate
B. It saves time and cost because it already exists
C. It is collected personally by the researcher
D. It is always completely up to date
Question 40

Why must data be stored properly in data science?

A. So it can be permanently hidden from analysis
B. So it turns into information automatically
C. So it can be retrieved, protected and analysed later
D. So it takes more time to find

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📌 MCQs — FAQs

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