The video provides an overview of the Spark ecosystem, detailing its core APIs and various modules. It covers the languages supported by Spark, including Java, Scala, Python, and R. The video explains the functionalities of Spark SQL for data transformation, Spark Streaming for handling real-time data, Spark MLlib for machine learning, and Spark GraphX for graph processing. The session concludes with a preview of the next video, which will involve hands-on practice with Spark.

What is the purpose of Spark Streaming?

Describe the role of Mllib in the Spark ecosystem.