Last weekend, I chatted with my buddy Guozi Hotpot in Beijing and chatted about the recent interview.
He said that the reason for wanting to change jobs is very simple, that is to raise wages, the original company stayed for more than two years, the salary fluctuated not more than 500 yuan. The salary of those colleagues who have changed jobs has been doubled.
In preparing for the interview, Guozi admitted that it was quite bitter.
I had to work on the code during the day and had to work overtime at night, resulting in no time to collect the interview questions, and there are many articles on the Internet that are all moving around. I feel that the interviewer is not bothered to ask similar questions.
After work, the whole person is a bit lazy, knowing how to implement it in code but no longer concerned about why it is used. But during interviews, it seems that I pay more attention to why than how. Some problems are not encountered even at work.
Speaking of which, Guo Zi has finished eating a plate of lamb, and the lenses are covered with a thin layer of mist by the heat. Guo Zi took off his glasses and wiped with the corner of his clothes, while continuing to chatter:
I think the key to getting a high salary is to prepare for the interview efficiently. If someone could give me a summary of the interview kit, I would n’t panic like that.
For programmers, the interview content is generally divided into two parts: programming interview questions + database interview questions .
According to an incomplete survey, the salary of MySQL as the mainstream choice in the database is increasing year by year, and it seems that not only programmers are learning, but even many product managers and operators have begun to learn MySQL to analyze data.
△ The picture comes from Liying.com
In order to let everyone avoid the troubles of Guozi's interview, we specially invited two technical veterans with 10 years of work experience. It took about three months to change the six versions, and finally formed This set of MySQL interview questions to help friends who are preparing for the interview.
Why is it suitable for you?
Introduction
For technical interviews, the core of the investigation includes the following two characteristics:
Extensive knowledge points are investigated , because different companies and different interviewer skills and knowledge structures are different, so the concerns and interview content are also different, so it has the characteristics of extensive interview knowledge points;
The knowledge points of the investigation are more in-depth . Taking Alibaba as an example, the interviews of these large factories are similar. Usually, they cut in from a large interview point and then go deeper until you are asked, such as, what do you know Database engine? What are the characteristics of this database engine? How does this database engine store data? Why use this storage method? and many more.
So for the above two questions, the author combined his more than 10 years of work and interview experience, after discussion and modification, finally formulated 8 major modules , summarized and introduced the typical interview questions in MySQL , it contains the following content.
Part 1: General module . This section covers the overall concept of MySQL, execution process, database engine, query cache, table space, back table query, the difference between data types, memory tables, temporary tables, n ways to delete tables, enumeration, views, data recovery, etc. Answer the interview questions corresponding to the relevant knowledge points.
Part 2: Index module . The quality of the index directly affects the performance of the database, so the interview questions of the index are also the questions that must be asked in the interview. This part is the collection of interview questions corresponding to the index.
The third part: transaction module . The transaction determines the stability of the program, and its status in MySQL is second to none. It is also an interview question that must be asked in the interview. This part is a collection of interview questions corresponding to the transaction.
The fourth part: lock . Locks include: global locks, table locks, row locks, deadlocks, optimistic locks, pessimistic locks, etc., the lock support granularity supported by different database engines is also different, this part of the interview questions, let you completely solve the lock-related interview questions .
Part V: Log . Logs seem inconspicuous, but they are the key to MySQL master-slave synchronization, disaster recovery, and problem elimination. Of course, they are also the questions that must be asked during interviews. This part will introduce the key logs in different database engines in detail.
Part VI: MySQL operation commands and built-in functions . MySQL operation commands are also a must-have skill for programmers or DBAs, for example, the creation of users and permissions, query of database-related information, etc., are inseparable from mastering the MySQL command line. The mastery of the built-in functions represents your mastery of MySQL. Making good use of the built-in functions provided by MySQL will make you more effective with less effort. The built-in functions are also the necessary interview questions in the written test.
Part VII: Performance optimization and distribution . Performance optimization and distribution are the key indicators that determine your height during the interview. Performance optimization includes the analysis and processing of slow queries, and the mastery of distribution reflects your technical depth.
Part VIII: Open issues . Many large companies will finally ask open questions that do not have standard answers to examine the technical ability boundaries of the interviewers and the analytical ideas for dealing with the problems. This part will help you get a more stable offer.
The corresponding knowledge graph is as follows
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1. Accompanied teaching by many professional teachers
Lao Wang: Senior Interviewer / Alibaba Cloud Certified Expert
More than ten years of programming experience, currently a technical research and development manager of a listed company, has worked in 360, has a wealth of experience in large-scale system design, development and tuning, in the process of continuous exploration and learning, has accumulated valuable programming and interview experience .
Zhang Jian: More than ten years of programming experience / Current project manager of a listed company
Worked in the Xinhua Insurance and Communications Division and Auto House. Has rich experience in the design, development and tuning of industrial manufacturing systems, call centers, and Internet systems. He has led the design and participated in the micro-service transformation of the BU monomer application of the car home used car, and has rich experience in micro-service architecture.
These two teachers will escort you on the way to interview MySQL . Presumably you will get more and better offers than others.
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