Hinzinfotech

Data Engineering interviews are no longer about definitions or SQL puzzles. Companies want engineers who can think like owners, handle uncertainty, and solve messy real-world problems. That’s why scenario-based questions dominate every major tech interview today — from fintech to SaaS to product companies. Below is a breakdown of twelve core scenarios that expose whether […]

Below are the 20 most commonly asked Snowflake interview topics — explained clearly and practically. 1. What is Snowflake’s architecture and why is it unique? Snowflake uses a multi-cluster shared data architecture, separating compute, storage, and cloud services. 2. Explain Virtual Warehouses and how scaling works. A Virtual Warehouse is compute used for query processing.Supports: […]

Databricks interviews are brutally simple: either you understand the core building blocks, or you don’t. And the gap shows immediately. These 20 questions represent what actually matters — the logic behind Delta Lake, pipeline reliability, ingestion patterns, and performance. Let’s break them down with clarity and precision. 1. Delta Lake vs Parquet A Delta table […]

In most data engineering setups, teams rely on scheduled batch jobs that reload entire datasets daily — even if only 1% of the files have changed. That’s inefficient, slow, and expensive. Databricks Auto Loader solves this with one key idea: incremental ingestion. It continuously tracks and processes only new files, enabling near real-time ingestion without […]

Recently one of my friend went through the CGI Data Engineer interview process, and trust me — it was a mix of real-world data problems, PySpark logic, and Azure ecosystem understanding.If you’re preparing for Azure + Databricks roles, these questions will hit the exact level you’ll face. Role : AZURE Data EngineerCTC : 25 LPAExp […]

Role : Data EngineerCTC : 25 LPAExp : 5+ yearsDifficulty Level : MEDIUM1️⃣ PySpark: You have a dataset with user_id, timestamp, and transaction_amount.Write PySpark code to calculate each user’s average transaction in the last 30 days using window functions.2️⃣ SQL: Write a query to find the second highest salary in each department and handle cases […]