DSE Basic 3

Question 1

What is a 'feature' in the context of machine learning?

Accepted Answer

An individual measurable property used as model input

Answer

A feature is an individual measurable input variable that the model uses to make predictions.

Question 2

Which type of chart is best for showing the distribution of a single continuous variable?

Accepted Answer

Histogram

Answer

A histogram groups continuous data into bins and shows frequency, revealing the distribution shape.

Question 3

What does SQL stand for?

Accepted Answer

Structured Query Language

Answer

SQL stands for Structured Query Language, used to manage and query relational databases.

Question 4

In supervised learning, what is the 'label'?

Accepted Answer

The known output used during training

Answer

The label (or target) is the known correct output that the model learns to predict during training.

Question 5

What is the interquartile range (IQR)?

Accepted Answer

Q3 minus Q1

Answer

The IQR is Q3 − Q1, representing the middle 50% spread of data and useful for detecting outliers.

DSE - Data Science Practice Test