The recruitment season in April of 2023 is so busy, without any real skills, no interview experience, and no understanding of workplace routines, how to pass five levels and cut six generals?
The most important step in finding a job is naturally the interview. In the job-hopping season, there are various interview questions on the Internet, which can make people dazzled for a while, and it is hard to tell which one to look for.
Although it is not recommended to memorize the answers, you still have to read the interview questions that you should read. Here are some general interview questions for MySQL, which can come in handy no matter which industry you are interviewing. Keep updating.
1. What is the difference between relational and non-relational databases?
2. Explain in detail the steps to execute a MySQL statement
01 Index related
3. Why does MySQL use indexes?
4. Three common underlying data structures of indexes and their advantages and disadvantages
5. What are the common types of indexes and how do they work?
6. What is the difference between MyISAM and InnoDB in implementing B-tree indexing?
7. Why does InnoDB design B+ tree index?
8. What are covering indexes and index pushdown?
9. What operations will cause the index to fail?
10. String plus index
02 Log related
11. What is the change buffer of MySQL?
12. How does MySQL determine the number of scans in a row?
13. What is the difference between MySQL's redo log and binlog?
14. Why do you need redo log?
15. Why does redo log have crash-safe capability, which cannot be replaced by binlog?
16. After the database crashes, how to restore the unrefreshed data to the memory?
17. How to write redo log?
18. What is the execution process of redo log?
19. What is the concept of binlog, what role does it play, and can it guarantee crash-safe?
20. What is two-phase commit?
21. How does MySQL know that the binlog is complete?
22. What is WAL technology and what are its advantages?
23. Three formats of binlog logs
24. Redo log log format
25. The execution speed of the SQL statement that could have been executed quickly is much slower than expected. What is the reason? How to solve?
26. InnoDB data page structure
03 Data related
27. How does MySQL ensure that data is not lost?
28. What should I do if I delete data by mistake?
29. The difference between drop, truncate and delete
30. There are two kill commands in MySQL
31. How to understand MySQL's post while reading
32. Why doesn't MySQL's large table query burst memory?
33. Usage and characteristics of MySQL temporary table
34. Introduction to MySQL storage engine (InnoDB, MyISAM, MEMORY)
35. It is said that InnoDB is good, so should we use the MEMORY engine?
36. If the database is misoperated, how to perform data recovery?
04 Master-slave backup related
37. How does MySQL ensure the synchronization of the master and backup?
38. What is the main and backup delay
39. Why is there a multi-threaded replication strategy?
40. What are the parallel strategies of MySQL?
41. What is the difference between MySQL's one master and one backup and one master and multiple slaves?
42. How to solve the problem of the main library?
43. Several solutions to the expired read problem related to MySQL read-write separation?
44. What is the difference between MySQL's concurrent links and concurrent queries?
05 Performance related
45. Methods to improve MySQL performance in a short time
46. Why is the MySQL auto-increment primary key ID not continuous?
47. Why does InnoDB use auto-increment ID as the primary key?
48. How to copy a table the fastest?
49. grant and flush privileges statement
50. Do you want to use a partition table?
51. join usage
52. What self-incrementing IDs does MySQL have? What are the respective scenes?
53. How is Xid generated inside MySQL?
06 Lock related
54. Talk about MySQL locks
55. What is phantom reading?
56. Why does MySQL shake?
57. Why does the size of the table file remain unchanged after deleting the table?
58. Count(*) implementation method and various count comparisons
59. The internal principle of orderby sorting
60. How to efficiently use MySQL explicit random messages
Software Testing Interview Documentation
We must study to find a high-paying job. The following interview questions are the latest interview materials from first-tier Internet companies such as Ali, Tencent, and Byte, and some Byte bosses have given authoritative answers. Finish this set The interview materials believe that everyone can find a satisfactory job.
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