Spark UI的默认端口是（）

A.1
B.2
C.3
D.服务器核心数

A.org.apache.spark.serializer.KryoSerializer
B.org.apache.spark.serializer.JavaSerializer
C.org.apache.spark.serializer.Lz4Serializer
D.org.apache.spark.serializer.ScalaSerializer

A.spark.driver.extraJarPath
B.spark.driver.extraClassPath
C.spark.driver.extraJarDirectory
D.spark.driver.extraClassDirectory

A.spark.dynamicAllocation.enabled
B.spark.dynamicScheduler.enabled
C.spark.dynamicShuffle.enabled
D.spark.dynamicSubmit.enabled

A.Driver
B.Executor
C.Client
D.DataNode

A.spark-run
B.spark-submit
C.spark-start
D.spark-launcher

A.Java
B.Python
C.Scala
D.C++

A.spark-shell
B.spark-submit
C.spark-interactive
D.spark-workbook