25 common questions in Flink interview (no answer)

1. flink and spark streaming Comparison of advantages and disadvantages of
2. Flink on Yarn Task submission process
3. Flink Sql Implementation process of
4. Flink The version used
5. Flink Memory model
6. Flink Watermark Mechanism
7. Flink CheckPoint Mechanism ？kafka exactly-once Two stages of ？
8. Flink State storage backend type ？RocksDBStateBendback Usage scenarios of , Advantages and disadvantages ？Flink1.14 Change of version status storage type   ？
9. FlinkSql In unbounded flow aggregation mini-batch Advantages and disadvantages of using
10. Flink operater chain Mechanism and advantages of operator chain
11. Flink Restart strategy after exception （ Fixed intervals , Failure frequency , No restart ）
12. Flink Several ways to set parallelism （ The configuration file , client , Operator , execution environment ）
13. Flink Causes of backpressure problems and how to locate and troubleshoot
14. Flink checkpoint Reasons for failure and how to locate and troubleshoot
15. Flink What effect does data skew have ？ How to handle data skew ？
16. Flink Data flow （source data source ,sink Database etc. , Why choose this sink The database of , How much do you know about this database ）
17. Flink Physical execution process （StreamGraph -> JobGraph -> ExecutionGraph -> Physical execution diagram ）
18. Flink 1.14 New function points in
19. Flink Which operators are commonly used in ,shuffer What are the operators of class ？
20. Have you ever used broadcast variables , Have used ？ What scene
21. Flink state The type of （keyState,operaterState）,key state What are they? ？
22. flink join What are the types ？
23. flink Measure the effect of output flow ？
24. flink slot and parallelism difference ？ slot Refer to taskmanager The concurrent execution ability of ,parallelism Refer to taskmanager The concurrency capability actually used
25. flink cdc principle
26. What are the ways of daily learning ？

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