🔹 ARTIFICIAL INTELLIGENCE – INTERVIEW REVISION SHEET

1️⃣ What is Artificial Intelligence?
> “Artificial Intelligence (AI) is the simulation of human intelligence processes by machines, especially computer systems. These processes include learning, reasoning, and self-correction.”

2️⃣ Types of AI
• Narrow AI: Specialized for specific tasks (e.g., voice assistants)
• General AI: Hypothetical AI that can perform any intellectual task that a human can do.

3️⃣ Key Concepts in AI
• Machine Learning (ML): A subset of AI that uses statistical techniques to enable machines to improve with experience.
• Deep Learning (DL): A subset of ML that uses neural networks with many layers to analyze various factors of data.

4️⃣ Machine Learning vs. Deep Learning
• ML: Requires feature extraction and often works well with structured data.
• DL: Automatically extracts features and excels with unstructured data like images and text.

5️⃣ Common Algorithms in AI
• Supervised Learning: Linear Regression, Decision Trees, Random Forest, Support Vector Machines.
• Unsupervised Learning: K-Means Clustering, Hierarchical Clustering, PCA.
• Reinforcement Learning: Q-Learning, Deep Q-Networks.

6️⃣ Neural Networks Basics
• Neurons: Basic units of a neural network.
• Layers: Input layer, hidden layers, output layer.
• Activation Functions: Sigmoid, ReLU, Softmax.

7️⃣ Important Concepts in Deep Learning
• Overfitting vs. Underfitting: Overfitting occurs when the model learns noise; underfitting occurs when the model is too simple.
• Regularization Techniques: Dropout, L2 regularization.

8️⃣ Natural Language Processing (NLP)
• Key Tasks: Sentiment analysis, text classification, machine translation.
• Techniques: Tokenization, stemming, lemmatization, word embeddings (Word2Vec, GloVe).

9️⃣ Computer Vision
• Key Tasks: Image classification, object detection, image segmentation.
• Techniques: Convolutional Neural Networks (CNNs), Transfer Learning.

🔟 Reinforcement Learning
• Concepts: Agent, environment, actions, rewards.
• Algorithms: Q-Learning, Policy Gradients, Proximal Policy Optimization (PPO).

1️⃣1️⃣ Evaluation Metrics in AI
• Classification: Accuracy, Precision, Recall, F1 Score, ROC-AUC.
• Regression: Mean Absolute Error (MAE), Root Mean Squared Error (RMSE).
• Clustering: Silhouette score, Davies-Bouldin index.

1️⃣2️⃣ Tools and Frameworks for AI
• Libraries: TensorFlow, PyTorch, Keras, Scikit-learn.
• Platforms: Google Cloud AI, AWS SageMaker, Microsoft Azure AI.

1️⃣3️⃣ Explain Your AI Project (Template)
> “The goal was . I collected data using . I built a model and evaluated it using . The final outcome was _.”

1️⃣4️⃣ Ethical Considerations in AI
• Bias in algorithms
• Transparency and explainability
• Privacy concerns

1️⃣5️⃣ HR-Style Data Science Answers
Why AI?
> “I am passionate about creating intelligent systems that can solve real-world problems and improve efficiency.”
Biggest challenge:
“Ensuring model fairness and handling bias.”
Strength:
“Strong foundation in both theory and practical implementation of AI algorithms.”

🔥 LAST-DAY INTERVIEW TIPS
• Focus on problem-solving approach rather than just technical details.
• Be prepared to discuss trade-offs in model selection.
• Emphasize the impact of your work on business outcomes.

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