Apache Spark 3 for Data Engineering and Analytics with Python - The Spark Web UI

The video tutorial introduces the Spark Web UI, demonstrating how to monitor Spark applications. It guides viewers through creating a simple Spark application to calculate the square of numbers using a lambda function and map transformation. The tutorial explains how to execute the application, print results, and check data types. It explores the Spark Web UI, detailing its tabs, jobs, stages, and scheduling modes. The video also covers the event timeline, DAG visualization, and the role of executors and tasks in parallel execution. Finally, viewers are encouraged to explore the Spark Web UI further.

What are the different scheduling modes available in Spark?

How does Spark handle multiple jobs and stages?

What is a DAG in the context of Spark, and why is it important?

Describe the role of executors in Spark and how they relate to tasks.