Interviewer বলল:

Build a model to predict food delivery time.

সরাসরি:

I’ll use XGBoost.

বলবেন না।

আগে problem define করুন।

একটা strong thought process:

Business Problem
      ↓
Prediction Target
      ↓
Prediction Time
      ↓
Available Features
      ↓
Data Quality
      ↓
Leakage Check
      ↓
Train / Validation / Test Strategy
      ↓
Baseline
      ↓
Candidate Models
      ↓
Evaluation Metrics
      ↓
Error Analysis
      ↓
Deployment
      ↓
Monitoring