In June 2021, the interview suffered a Waterloo. Is it so convoluted now

Hello everyone , I meet you again , I'm the king of the whole stack .

My foundation

1 understand laravel/thinkphp/yii/ci frame crud,python frame

2 understand mysql/redis/kafka/mq/zookeeper/lvs/

jsv/lnmp/k8s/angluar/workerman/swoole

3 Wrote chat items , Shopping Mall , Applet , Job search applet and other projects

I think there must be no problem in the interview , sure 100% success , I am interviewing for a senior position 21k

As a result, the interview not only asked , I also need to verify it on the computer , The interviewer not only listens to me pretending , I also need to verify my knowledge of pretending ！

I recall recording the interview

Technical interviewer ： You said in your resume that you are proficient php？

I ： Yes

Technical interviewer ： Please say php stay linux The process when the terminal is started and verified on the machine

I ：？？？ This , It is at the terminal that I input php abc.php When it starts

Technical interviewer ： Let's talk about the detailed process

I ： I don't know

Technical interviewer ： Next question , Please answer php sockets Extension and swoole The difference and common ground of

I ： They are all php An extension of , One is php Written , One is c/c++ Written

Technical interviewer ： Please elaborate ,php sockets swoole start-up tcp The detailed process of service

I ： I do not know!

Technical interviewer ： Next question , I heard that you are proficient in API Interface writing , So right. HTTP The agreement must be familiar , Please say http Protocol implementation process

I ： It consists of a request header , Request line , Request body , Response line , Response head , Responder composition , The status code has 1xx,2xx,3xx,4xx,5xx these , After the request responds, the server disconnects it .

Technical interviewer ： Your answer is from Baidu ？ Write a support on the machine GET/POST/TEST The request is simple HTTP agreement

I ： No, TEST Ask for the method , I've only heard about it. GET,POST,PUT,DELETE,OPTION,PATCH These , I can't write this

Technical interviewer ：em.. Next question , You said you wrote a chat system ？ With websocket? be familiar with websocket Do you ？

I ： Um. , very familiar

Technical interviewer ： The way websocket The structure of the agreement and modify the structure of this agreement

I ： This , Forget the 【 In essence, I won't 】

Technical interviewer ： Next question , The way mysql The principle of connection pool

I ： It puts the connection objects in a pool , Take it out when you use it , Put it in the pool when not in use

Technical interviewer ： This completes the answer ？mysql After starting , Yours php pdo After the connection pool is connected ,socket Connection table in mysql Where is the process ？ as well as socket Where is the file descriptor ？ You know what? ？

I ： I do not know!

Technical interviewer ： ok , Next question , The way redis The principle of master-slave replication and realize the communication protocol on the computer

I ： This , Not so much , Only use

Technical interviewer ： ok , Next question , The way RPC Principle and demonstrate the communication process on the computer , And your experience in microservice development

I ： This is a remote call protocol , It can call remote functions to get response results ....

Technical interviewer ： Your answer is not satisfactory , Next question , Say you are right swoole Understand the synergy and the difference between it and thread, and demonstrate your theory on the computer

I ： This will not

Technical interviewer ： Next question , Please write an implementation similar to nginx Load balancing server sample program

I ： This will not

Technical interviewer ： Next question , You said you would python Language , The way python and php The difference and common ground of

I ： The main reason is that the grammar is different ,python Powerful , There are many tool libraries ,php Easy to use

Technical interviewer ： What you said is not what I want ,

Technical interviewer ： Next question , Please talk about high concurrency , What is the process doing ？

I ： I do not know!

Technical interviewer ： We are interviewing senior engineers , Your basic knowledge is not very solid , Not very sound , I'm sorry . You are not suitable for our position

The above is the interview question and computer demonstration I encountered during the interview last week , Now programmers are seriously introverted , The interview was about building a nuclear bomb , Screw it in , But without the ability to build nuclear bombs , I can't pass the interview . Just like the college entrance examination , I know it's not used in high school life , I can't buy vegetables with calculus , chemical , I can't use physics , But I did well in the exam ！！！

I hope you can work together to continue to strengthen the learning of basic knowledge . Impetuous and arrogant prejudice , defiant , I think I'm the best in the world. I need to clean up , A mountain is higher than a mountain , It's time to calm down and study the basics .

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