Sample Questions

Data Analytics — 5 random MCQs with answers & explanations

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These 5 questions are randomly selected (standard MCQs only, not case-based).

Q1 Which statement correctly defines data source?

A. a system, person, document, device, or service from which data is obtained Correct Answer
B. a SQL keyword only
C. a chart only
D. a database index only

Explanation:

A system, person, document, device, or service from which data is obtained.

Marks: 1

Q2 What is normalization primarily intended to reduce?

A. Redundancy and update anomalies Correct Answer
B. SQL syntax
C. All indexes
D. All joins

Explanation:

Normalization reduces unnecessary duplication and related data anomalies.

Marks: 2

Q3 What is a foreign key?

A. A numerical average
B. A field that references a key in another related table Correct Answer
C. A chart label
D. A quality score

Explanation:

A field that references a key in another related table is correct because it is the appropriate data-quality concept or practice for the situation described.

Marks: 1

Q4 Which option best describes web scraping?

A. automatically extracting information from web pages Correct Answer
B. encrypting websites
C. designing a webpage
D. backing up a database

Explanation:

Automatically extracting information from web pages.

Marks: 1

Q5 What is a continuous random variable?

A. A variable that can take values over a continuous interval Correct Answer
B. A variable that can take only integers
C. A variable with exactly two outcomes
D. A variable that has no probability

Explanation:

A variable that can take values over a continuous interval.

Marks: 1

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