Interview Questions and Answers
Freshers / Beginner level questions & answers
Ques 1. Explain the concept of feature engineering.
Feature engineering involves transforming raw data into a format that is more suitable for modeling. It includes tasks like scaling, normalization, and creating new features to improve the performance of machine learning models.
Save For Revision
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Ques 2. What is the purpose of the activation function in a neural network?
The activation function introduces non-linearity to a neural network, allowing it to learn complex patterns. Common activation functions include sigmoid, tanh, and ReLU.
Save For Revision
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Ques 3. Explain the term 'precision' in the context of classification.
Precision is the ratio of correctly predicted positive observations to the total predicted positives. It is a measure of the accuracy of positive predictions made by a classification model.
Save For Revision
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Ques 4. What is the purpose of regularization in machine learning?
Regularization is used to prevent overfitting in machine learning models by adding a penalty term to the cost function. It discourages the model from fitting the training data too closely and encourages generalization to new, unseen data.
Save For Revision
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Ques 5. What is the concept of a confusion matrix?
A confusion matrix is a table used to evaluate the performance of a classification model. It compares the predicted and actual class labels, showing true positives, true negatives, false positives, and false negatives.
Save For Revision
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Ques 6. Explain the term 'hyperparameter' in the context of machine learning.
Hyperparameters are configuration settings for machine learning models that are not learned from the data but are set before the training process. Examples include learning rate, regularization strength, and the number of hidden layers in a neural network.
Save For Revision
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Ques 7. What is the purpose of the term 'one-hot encoding' in machine learning?
One-hot encoding is a technique used to represent categorical variables as binary vectors. Each category is represented by a unique binary value, with only one bit set to 1 and the rest set to 0. It is commonly used in machine learning algorithms that cannot work directly with categorical data.
Save For Revision
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Ques 8. What is the purpose of a confusion matrix in the context of classification?
A confusion matrix is a table that summarizes the performance of a classification algorithm. It shows the number of true positives, true negatives, false positives, and false negatives, providing insights into the model's accuracy, precision, recall, and other metrics.
Save For Revision
Save For Revision
Bookmark this item, mark it difficult, or place it in a revision set.
Log in to save bookmarks, difficult questions, and revision sets.
Most helpful rated by users:
- Explain the concept of feature engineering.
- What is the purpose of regularization in machine learning?
- Explain the term 'hyperparameter' in the context of machine learning.
- What is the purpose of the activation function in a neural network?
- Explain the term 'precision' in the context of classification.
Related interview subjects
| OpenCV preguntas y respuestas de entrevista - Total 36 questions |
| Amazon SageMaker preguntas y respuestas de entrevista - Total 30 questions |
| TensorFlow preguntas y respuestas de entrevista - Total 30 questions |
| Hugging Face preguntas y respuestas de entrevista - Total 30 questions |
| Gemini AI preguntas y respuestas de entrevista - Total 50 questions |
| Oracle AI Agents preguntas y respuestas de entrevista - Total 50 questions |
| Artificial Intelligence (AI) preguntas y respuestas de entrevista - Total 47 questions |
| Machine Learning preguntas y respuestas de entrevista - Total 30 questions |
| Google Cloud AI preguntas y respuestas de entrevista - Total 30 questions |
| IBM Watson preguntas y respuestas de entrevista - Total 30 questions |
| Perplexity AI preguntas y respuestas de entrevista - Total 40 questions |
| ChatGPT preguntas y respuestas de entrevista - Total 20 questions |
| NLP preguntas y respuestas de entrevista - Total 30 questions |
| AI Agents (Agentic AI) preguntas y respuestas de entrevista - Total 50 questions |