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40 Redis interview questions for 2021 - 2022

Redis interview questions 1.What is Redis?. 2. What is the data type of Redis? 3. What are the benefits of using Redis? 4. What are the advantages of Redis over Memcached? 5. What are the differences between Memcache and Redis? 6. Is Redis single-process and single-threaded? 7. What is the maximum storage capacity of a string type value? 8. What is the persistence mechanism of Redis? Their advantages and disadvantages? 9. Redis common performance problems and solutions: 10. What is the deletion strategy of redis expired keys? 11. Redis recycling strategy (elimination strategy)? 12. Why does edis need to put all data in memory? 13. Do you understand the synchronization mechanism of Redis? 14. What are the benefits of Pipeline? Why use pipeline? 15. Have you used Redis cluster? What is the principle of cluster? 16. Under what circumstances will the Redis cluster solution cause the entire cluster to be unavailable? 17. What are the Java clients supp...

Recursion-maze problem - Rat in the Maze - Game

package com.bei.Demo01_recursion; public class MiGong { public static void main(String[] args) { //First create a two-dimensional array to simulate the maze int [][]map=new int[8][7]; //Use 1 for wall for (int i = 0; i <7 ; i++) { map[0][i]=1; map[7][i]=1; } for (int i = 0; i <8 ; i++) { map[i][0]=1; map[i][6]=1; } //Set the bezel map[3][1]=1; map[3][2]=1; //Output for (int i = 0; i <8 ; i++) { for (int j = 0; j ...

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