🎯 Complete Interview Preparation Guide
Data Analyst (Fresher) — DecisionTree Analytics & Services, Gurugram
Welcome to your comprehensive interview preparation suite. This guide covers every round you'll face when interviewing for a Fresher Data Analyst position at DecisionTree Analytics.
What Makes This Guide Special
- 📚 13 detailed documents covering every interview round
- 🧠 Hinglish helper comments at key points for better retention
- 💻 Hands-on code — SQL, Python, DAX with worked examples
- 🧩 8 case studies with progressive difficulty (SQL → Python → ML)
- 📊 Guesstimates & puzzles — 20+ solved problems
Quick Navigation
| Round | Focus | Duration |
|---|---|---|
| Round 1 | HR Screening | 15–25 min |
| Round 2 | Aptitude & Logical Reasoning | 30–45 min |
| Puzzles | Guesstimates & Brain Teasers | 10–20 min |
| Round 3 | SQL (Technical) | 30–45 min |
| Round 4 | Python for Data Analysis | 30–45 min |
| Round 5 | Tableau & BI | 20–30 min |
| Round 6 | Statistics & Probability | 20–30 min |
| Round 7 | Machine Learning & Decision Trees | 25–40 min |
| Round 8 | Case Studies & Problem Solving | 30–45 min |
| Round 9 | Managerial / Client-Facing | 20–30 min |
| Round 10 | Behavioral / HR Final | 15–20 min |
| Power BI | Additional BI Skill | — |
| Reference | Excel + Cheat Sheet | — |
note
Not every candidate goes through all 10 rounds. The exact process depends on the role level, the hiring manager, and the current hiring cycle. However, preparing for all rounds ensures you're ready for anything.