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Could you tell us about why you'd be a good fit for Meta?

Can you tell us about a time when you received unpleasant feedback?

When have you taken a risk?

Develop a taxi-booking service similar to Uber.

Describe an occasion when you took ownership

Design a system for real-time processing of network traffic for intrusion detection.

Construct a flexible payment planner for Meta.

Can you outline what sets DMatrix apart in XGBoost compared to other data structures in similar boosting techniques?

Create a scalable search engine optimized for distributed systems.

For those of us not well-versed in decision trees, could you provide an explanation of bias and variance and how they're pertinent? Additionally, could you share with us which of those two is tougher to deal with: high bias or high variance - and why?