Mr.K | Data Engineer on Instagram: "Ever wondered how Spark processes big data so fast? Here’s a simple breakdown: 🔹 Driver & SparkContext → The brain of Spark! Creates jobs, breaks them into tasks & sends them to workers. 🔹 YARN Resource Manager → Allocates resources across the cluster. 🔹 YARN Application Master → Manages the lifecycle of your Spark application. 🔹 Executors → Workers running tasks in parallel, caching data & storing in HDFS. 🔹 HDFS & Cache → Distributed storage & fast in-m