Apache Spark 面试题与答案

Question: Explain the role of the Spark Driver in a Spark application.

Answer: The Spark Driver is the program that runs the main() function and creates the SparkContext. It coordinates the execution of tasks on the Spark Executors and collects results from them.

Example:

object MyApp {
  def main(args: Array[String]): Unit = {
    val sc = new SparkContext("local", "MyApp")
  }
}