EXL Service Data Science Manager Interview Questions and Answers

Q1. Implement backpropagation algorithm in python
Ans. 
Backpropagation algorithm is used to train neural networks by calculating gradients of the loss function with respect to the weights.
• Initialize weights randomly

• Forward pass to calculate predicted output

• Calculate loss using a loss function like mean squared error

• Backward pass to calculate gradients using chain rule

• Update weights using gradients and a learning rate
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Q2. How do you ensure that retrieval in RAG give the correct documents? Explain any project involving generative AI.
Ans. 
Ensuring correct document retrieval in RAG and discussing a project involving generative AI.
• Utilize a combination of retrieval and generative models in RAG to ensure correct document retrieval.

• Implement techniques such as fine-tuning the models, using diverse training data, and optimizing hyperparameters.

• Regularly evaluate the performance of the models through metrics like precision, recall, and F1 score.

• Provide exampl...read more
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More in-depth discussion about the projects. Why did you take certain decisions etc.