Data Science Trivia 4

Question 1

What does 'ETL' stand for in data engineering?

Accepted Answer

Extract, Transform, Load

Answer

ETL describes moving data from sources into a destination after transformation.

Question 2

Which value, ranging from -1 to 1, measures linear correlation between two variables?

Accepted Answer

Pearson correlation coefficient

Answer

The Pearson coefficient quantifies linear correlation between -1 and 1.

Question 3

In hypothesis testing, what does a small p-value typically suggest?

Accepted Answer

Strong evidence against the null hypothesis

Answer

A small p-value indicates results are unlikely under the null hypothesis.

Question 4

Which visualization library is most associated with statistical plotting in Python and is built on Matplotlib?

Accepted Answer

Seaborn

Answer

Seaborn builds on Matplotlib to create attractive statistical graphics.

Question 5

What is a row in a relational database table also called?

Accepted Answer

Record

Answer

A row representing a single data entry is called a record.

Data Science Practice Test