Machine Learning MCQs

#1. What is the role of a learning rate in gradient descent optimization?

It controls the size of the steps taken during optimization

It determines the number of training samples

It specifies the number of features in the dataset

It defines the number of iterations in training

It adjusts the complexity of the model

#2. In a neural network, what is the purpose of the activation function?

To introduce non-linearity into the model

To reduce the number of parameters

To improve the interpretability of the model

To speed up the training process

To add noise to the data

#3. Which type of machine learning algorithm is well-suited for recommendation systems?

Collaborative Filtering

Decision Trees

Support Vector Machines (SVM)

K-Means Clustering

Linear Regression

#4. What is the objective of Principal Component Analysis (PCA) in dimensionality reduction?

To project data onto a lower-dimensional subspace while retaining the most important information

To increase the number of features in the dataset

To separate data into distinct clusters

To minimize the training time

To transform data into a non-linear space

#5. What is the main advantage of using an ensemble learning method like Random Forest?

It reduces overfitting and increases model robustness

It simplifies the model and improves interpretability

It speeds up the training process

It eliminates the need for feature engineering

It requires fewer training samples

#6. In which phase of a machine learning project is cross-validation typically applied?

Model evaluation

Data preprocessing

Model training

Model deployment

Data collection

#7. What is the purpose of L1 regularization (Lasso) in linear regression?

It encourages sparsity by penalizing the absolute values of coefficients

It increases the number of features in the model

It adds noise to the data

It reduces the complexity of the model

It enforces non-negativity of coefficients

#8. Which algorithm is used for finding frequent itemsets in association rule mining?

Apriori algorithm

K-Means Clustering

Naive Bayes

Decision Trees

Support Vector Machines (SVM)

#9. What is the objective of batch normalization in deep learning?

To stabilize and speed up the training process

To reduce the number of parameters in the model

To increase the learning rate

To add noise to the data

To simplify the model

#10. Which technique is used to combat the class imbalance problem in classification tasks?

Resampling (e.g., oversampling or undersampling)

Bagging

Pruning

Feature selection

Dimensionality red

#11. What is the objective of a support vector machine (SVM) in classification tasks?

To find the hyperplane that maximizes the margin between classes

To reduce model complexity

To perform feature selection

To maximize prediction accuracy

To minimize the number of features

#12. Which technique is used for handling multicollinearity in linear regression?

Ridge regression

L1 regularization (Lasso)

Principal Component Analysis (PCA)

Logistic regression

K-Nearest Neighbors (KNN)

#13. What is the purpose of dropout regularization in deep learning?

To prevent overfitting by randomly dropping out neurons during training

To increase the number of hidden layers

To speed up the training process

To add noise to the data

To reduce the learning rate

#14. In reinforcement learning, what is the role of the reward function?

It provides feedback to the agent about its actions

It specifies the number of episodes in training

It determines the number of states in the environment

It controls the exploration rate

It sets the learning rate

#15. Which type of learning algorithm can perform online learning (i.e., learn continuously from new data)?

Incremental learning

Batch learning

Reinforcement learning

Unsupervised learning

Semi-supervised learning

#16. What is the purpose of the term “momentum” in gradient descent optimization?

To help accelerate convergence and escape local minima

To reduce the learning rate

To add noise to the data

To increase the number of features

To regularize the model

#17. Which method is used for feature extraction in natural language processing (NLP)?

Word Embeddings (e.g., Word2Vec, GloVe)

Principal Component Analysis (PCA)

Support Vector Machines (SVM)

K-Means Clustering

Decision Trees

#18. What is the goal of hierarchical clustering in unsupervised learning?

To group similar data points into clusters based on their proximity

To classify data into predefined categories

To maximize prediction accuracy

To minimize model complexity

To reduce the number of features

#19. Which algorithm is commonly used for time series forecasting in machine learning?

ARIMA (AutoRegressive Integrated Moving Average)

Naive Bayes

Support Vector Machines (SVM)

K-Nearest Neighbors (KNN)

Decision Trees

#20. What is the purpose of a learning rate scheduler in deep learning?

To dynamically adjust the learning rate during training

To add noise to the data

To increase the number of hidden layers

To reduce model complexity

To speed up the training process

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#1. What is the role of a learning rate in gradient descent optimization?

#2. In a neural network, what is the purpose of the activation function?

#3. Which type of machine learning algorithm is well-suited for recommendation systems?

#4. What is the objective of Principal Component Analysis (PCA) in dimensionality reduction?

#5. What is the main advantage of using an ensemble learning method like Random Forest?

#6. In which phase of a machine learning project is cross-validation typically applied?

#7. What is the purpose of L1 regularization (Lasso) in linear regression?

#8. Which algorithm is used for finding frequent itemsets in association rule mining?

#9. What is the objective of batch normalization in deep learning?

#10. Which technique is used to combat the class imbalance problem in classification tasks?

#11. What is the objective of a support vector machine (SVM) in classification tasks?

#12. Which technique is used for handling multicollinearity in linear regression?

#13. What is the purpose of dropout regularization in deep learning?

#14. In reinforcement learning, what is the role of the reward function?

#15. Which type of learning algorithm can perform online learning (i.e., learn continuously from new data)?

#16. What is the purpose of the term “momentum” in gradient descent optimization?

#17. Which method is used for feature extraction in natural language processing (NLP)?

#18. What is the goal of hierarchical clustering in unsupervised learning?

#19. Which algorithm is commonly used for time series forecasting in machine learning?

#20. What is the purpose of a learning rate scheduler in deep learning?

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