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Ellen Latest Publications

  • Atchyut
  • August 25, 2025

Databricks-PySpark Interview Questions

DataSpark Academy – Databricks PySpark Interview Questions DataSpark Academy Comprehensive Databricks PySpark Interview Questions & Answers Atchyut Senior Data Engineering Instructor 📚 M.Tech NIT Calicut ⏰ 15+ Years Experience 🏆 GATE AIR 400 Rank 💼 Data Engineering Expert With over 15 years of experience in data engineering and a distinguished academic background from NIT Calicut,

  • Atchyut
  • January 8, 2025

Learn Lazy Evaluation in Databricks PySpark: Benefits, Examples, and Tips

Lazy evaluation is one of the most powerful concepts in Apache Spark that significantly optimizes the execution of big data processing workflows. It allows Spark to defer computation until an action is performed, thereby improving efficiency and resource utilization. In this blog, we will explore lazy evaluation in Databricks PySpark with detailed explanations, examples, and

  • Atchyut
  • May 12, 2024

Azure Data Factory – Interview Questions

1.What is Azure Data Factory? Answer: Azure Data Factory is a cloud-based, fully managed, server less ETL and data integration service offered by Microsoft Azure for automating data movement from its native place to say a data lake or data warehouse using ETL (extract-transform-load) OR extract-load-transform (ELT). It lets you create and run data pipelines that

Azure Data Engineering from Scratch

Updated: August 22, 2025
All Levels 70 hours

Embark on a transformative journey into the realm of Azure Data Engineering with our comprehensive course. Dive deep into the core elements of SQL Server, Azure Data Factory, Databricks PySpark, Delta Lake, Data Warehouse concepts, Logic App for seamless notifications, and Key Vault for secure secrets storage. This course is not just about theory; it’s

Theory of Computation(TOC) / Automata : Complete Pack – 2023

Updated: August 18, 2025
All Levels 11 hours 51 minutes

Learn and play with DFA, NFA, DPDA, NPDA, LBA, Turing Machine and Formal Languages.

The Ultimate : Compiler Design for 2023 – Module 1

Updated: April 4, 2025
All Levels 8 hours 39 minutes

Deep Dive in Lexical Analysis, Syntax Analysis (Top Down Parsers and Bottom Up Parsers).