Java Basics
Which jdk source code and commonly used libraries have you seen?
Which Resultful style to use
The difference between multi-threaded synchronized and lock
What multi-threaded code to write
JVM memory model and garbage collection mechanism
The function and working mode of classloader
Hashmap principle
Hashmap expansion mechanism, currenthashmap principle
A and B objects refer to each other, whether to garbage collect
String object memory address
big data technology
Hbase secondary index
Hbase rowkey design
How to create Hbase column family
Hbase finds a single piece of data, how to locate that piece of data
Hbase internal structure
How does the internal structure of Hbase correspond to that in the hbase table?
Hbase internal mechanism
Explanation of the principle of Mapreduce
In hadoop , combine , partition , shuffle function
Mapreduce secondary sorting
Mapreduce shuffle explained
Hive data skew type
How to solve hive data skew
Difference between Hive internal table and external table
What is data skew
The difference between S park RDD operation map and flatmap