DAC Machine Learning & Predictive Analytics

Question 1

Which machine learning algorithm is best suited for classifying emails as spam or not spam?

Accepted Answer

Naïve Bayes

Answer

K-Means Clustering

Answer

Linear Regression

Answer

Principal Component Analysis (PCA)

Question 2

What is the purpose of cross-validation in machine learning?

Accepted Answer

To prevent overfitting

Answer

To make the model train faster

Answer

To increase data storage capacity

Answer

To add more hidden layers to neural networks

Question 3

Which metric is commonly used to evaluate the performance of a regression model?

Accepted Answer

Mean Squared Error (MSE)

Answer

F1 Score

Answer

Confusion Matrix

Answer

Precision

Question 4

What is the main goal of feature scaling in machine learning?

Accepted Answer

To make numerical features comparable

Answer

To increase dataset size

Answer

To remove duplicate records

Answer

To add more categorical variables

Question 5

Which of the following is an unsupervised learning algorithm?

Accepted Answer

K-Means Clustering

Answer

Decision Trees

Answer

Support Vector Machines (SVM)

Answer

Logistic Regression

Question 6

Which technique is commonly used to reduce dimensionality in machine learning?

Accepted Answer

Principal Component Analysis (PCA)

Answer

Bagging

Answer

Boosting

Answer

Random Forest