MS-DS Master of Data science FREE Master of Data Science Questions and Answers 3

Question 1

Which dimensionality reduction technique preserves the global variance structure of the data by projecting it onto orthogonal components?

Accepted Answer

Principal Component Analysis (PCA)

Answer

t-SNE

Answer

UMAP

Answer

Autoencoders

Question 2

In a data science graduate program, what does ETL stand for in the context of data engineering?

Accepted Answer

Extract, Transform, Load

Answer

Evaluate, Train, Learn

Answer

Encode, Test, Launch

Answer

Estimate, Tune, Leverage

Question 3

Which type of neural network architecture is best suited for sequential data such as time series or natural language?

Accepted Answer

Recurrent Neural Network (RNN)

Answer

Convolutional Neural Network (CNN)

Answer

Generative Adversarial Network (GAN)

Answer

Autoencoder

Question 4

What is the main advantage of using ensemble methods like Random Forest over a single decision tree?

Accepted Answer

They reduce overfitting by averaging predictions from multiple trees

Answer

They require less computational power

Answer

They eliminate the need for feature engineering

Answer

They always produce interpretable models

Question 5

Which probability distribution is commonly used to model the number of events occurring in a fixed interval of time?

Accepted Answer

Poisson distribution

Answer

Normal distribution

Answer

Bernoulli distribution

Answer

Uniform distribution

Question 6

What is the purpose of A/B testing in a data-driven organization?

Accepted Answer

To compare two versions of a variable to determine which performs better

Answer

To clean and preprocess raw datasets

Answer

To train machine learning models on labeled data

Answer

To visualize data distributions