PySpark 面试题与答案
Question: What is the purpose of the 'accumulator' in PySpark?Answer: An 'accumulator' is a variable that can be used in parallel operations and is updated by multiple tasks. It is typically used for implementing counters or sums in distributed computing.Example:
|
保存以便复习
收藏此条目、标记为困难题,或将其加入复习集合。
这有帮助吗? 是 否
用户评价最有帮助的内容: