Data Science Trivia 3

Question 1

Which machine learning task predicts a continuous numeric output?

Accepted Answer

Regression

Answer

Regression models predict continuous values like price or temperature.

Question 2

What is the popular open-source library developed by Google for deep learning?

Accepted Answer

TensorFlow

Answer

TensorFlow is Google's framework for building neural networks.

Question 3

In a confusion matrix, what are correctly predicted positive cases called?

Accepted Answer

True positives

Answer

True positives are cases predicted positive that are actually positive.

Question 4

Which technique reduces the number of features while preserving variance?

Accepted Answer

PCA

Answer

Principal Component Analysis projects data onto fewer dimensions.

Question 5

What does overfitting mean in a machine learning model?

Accepted Answer

It performs well on training data but poorly on new data

Answer

Overfitting means the model memorizes training data and fails to generalize.

Data Science Practice Test