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Q1A project manager is working with a data science team on a customer churn prediction model. Which type of machine learning approach is most appropriate for this business problem?
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✓ Correct answer: Supervised learning with classification algorithms
Customer churn prediction is a classification problem where we predict whether a customer will leave (churn) or stay. This requires supervised learning, as we have historical data with labeled examples of customers who have churned or not churned in the past.
Q2Which ensemble method combines multiple weak learners trained sequentially, with each new model attempting to correct errors made by previous models?
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✓ Correct answer: Boosting
Boosting is an ensemble technique that builds models sequentially, with each new model focusing on correcting the errors made by previous models. AdaBoost and Gradient Boosting are examples of boosting algorithms.
Q3An AI project manager is evaluating different approaches for a credit scoring application. What is the primary advantage of using a random forest over a single decision tree?
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✓ Correct answer: Reduced risk of overfitting to training data
Random forests reduce overfitting by averaging predictions from multiple trees trained on different subsets of data and features. This ensemble approach provides more robust predictions than a single decision tree, which is prone to overfitting to training data.
Q4In a deep learning project, what is the primary function of an activation function in a neural network?
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✓ Correct answer: To introduce non-linearity into the network
Activation functions introduce non-linearity into neural networks, allowing them to learn complex patterns. Without activation functions, neural networks would be limited to learning linear relationships regardless of depth.
Q5A project team is developing a recommendation system that suggests products to users based on the purchasing patterns of similar customers. Which machine learning approach best describes this scenario?
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✓ Correct answer: Collaborative filtering
Collaborative filtering is a technique used in recommendation systems that identifies patterns in user behavior and preferences by finding similarities between users (user-based) or items (item-based) to make recommendations.
Q6Which deep learning architecture is specifically designed for processing sequential data such as time series or natural language?
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✓ Correct answer: Recurrent Neural Networks (RNNs)
Recurrent Neural Networks (RNNs) are specifically designed to handle sequential data by maintaining an internal state (memory) that captures information about previous inputs in the sequence, making them well-suited for time series analysis and natural language processing.
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