one side
Ask all the basics , Bad answer , Record it here , Save your character .
- Linked list A linked list with links , How to confirm that there are links in the linked list , The length of the ring .
- hashmap To design a hashmap, What data structure do you want to use Can use arrays as storage hashmap The data structure of ？ If not , What to do ？ How to solve hash Conflict How is your design based on key Find the corresponding value
- mysql Business mysql There are several isolation levels for transactions , Explain separately In the serialization isolation level , How to add read lock and write lock , What kind of lock is the lock here ： Table locks ？ Row lock ？ Or another lock ？
- mysql The index of Suppose the joint index is <a,b,c> select * from table_name where c> 10 and a = 10 and b < 10 limit 2000,10 What's wrong with this statement , How to optimize
- Linux Operation related How to view cpu Occupy top In command idle Explanation of the field How to view port occupancy How to view file operation permissions ls -al in Before each line 10 A character means How to change file permissions
- go relevant Introduce the cooperation process , The relationship between a process and a thread MPG Model One main Function go Start multiple processes , Now a collaborative process panic 了 ,main What happens to the function ？ Why? ？ User mode and kernel mode
- tcp relevant tcp and udp The difference between agreements ,tcp And udp Do you have any characteristics tcp Principle of sliding window in , Suppose the window 1,2,3 Has sent , Distal ack 4 , Should the sliding window move forward at this time ？ Why? ？
- http relevant http How to realize stateful connection cookie and session The difference between
- Programming questions String addition ： To add , But the input and output numbers are in string format
