Preface
"The soul of colleges and colleges, colleges are all human beings."
When I saw this sentence suddenly became popular on various platforms, a number of netizens started to criticize the specialty.
One of the comments is still fresh in my memory: college students can do whatever they can, but don't be programmers, and don't harm the IT industry. When I finished reading this comment, I couldn't bear to make me type out this article. As someone who has graduated from a junior college to become a programmer, I found that everyone is full of maliciousness towards junior college students as programmers. Many people say that junior college students can be programmers? Can college enter a big factory? Is there really no spring to be a Java programmer?
Don't dare to say that I was speaking out.
But the editor, I am indeed a major company with a professional background, and I am currently working as a Java post in Pinduoduo. We must also tell everyone that the journey to Dachang is extremely tormenting and long, not to mention other skills or learning abilities. The degree of "college" education is already overwhelming when faced with the mountain of education.
Because of this, if you have a college degree and dream of a big factory, once you decide your goal, you will have to work a hundred times or more. Many people will definitely be curious about how I entered the big factory. I will not go into details about the specific situation. I found familiar bloggers through the Java blog and pushed them. After knowing each other, I might also want to join the big factory. The spirit moved hahaha.
Let's talk about the specific interview process questions today. (Only the real situation of the individual)
Fight more and more
First introduce yourself.
Which projects have you participated in
? Three elements of concurrent programming?
What are the ways to achieve visibility?
The value of multithreading?
Comparison of the three ways of creating threads?
Draw the state flow diagram of threads. What are the
commonly used concurrency tools?
The difference between CyclicBarrier and CountDownLatch
CAS problems: 1. CAS is prone to cause ABA problems 2. The atomicity of code blocks cannot be guaranteed 3. CAS causes CPU utilization to increase.
ReadWriteLock What
is the interview question answer :
Pinduoduo two sides
Introduce yourself
What is the factory model?
How to add and delete singly linked lists?
Let me say what parts of JVM are divided into?
Since memory overflow was mentioned, the interviewer asked me the difference between memory overflow and memory leak?
After asking here, I went to the database, what are the four major features, for example?
What are the isolation levels of data, for example for each isolation level?
What do you know about the implementation of distributed locks?
Which lock do you recommend? What are the persistence operations of Redis?
How to use redis to handle hot data.
What is the difference between sleep method and wait method? The difference between
synchronized and ReentrantLock
How does thread B know that thread A has modified the variable?
If you submit a task, the thread pool queue is full, then what will happen to the
thread class construction Method and static block are the
answers to the two-sided interview questions that are called by which thread :
Pinduoduo three sides
As usual,
I introduced myself and the project; when I came up, let me tear up a singleton pattern.
Let me talk about what the code means?
Since the JVM is mentioned in my project, I gave me a scenario question. In the garbage collector, after the mark is cleared many times, since the mark clearing algorithm is used, what problems do you think may occur?
I mentioned full gc here. Ask me, which conditions will produce full GC and which conditions will produce minor GC?
In addition to the memory overflow problem in your project, what else do you know about memory overflow and memory leak?
Then gave me a handwritten code problem for dynamic programming, let's write a code.
Three-sided interview answers :
Pinduoduo HR noodles
Introduce
yourself. Why did you choose Pinduoduo?
What are your greatest strengths and weaknesses?
Talk about your views on the company's overtime work.
Talk about your friends' evaluations of you and
how do you usually learn?
What are you encountering more difficult to deal with?
What do you think is more successful?
Imagine what your life will be like decades later?
The most painful period of time
. Do you find the work pace acceptable?
What do you want to ask?
The above are the questions of my Pinduoduo interview. I basically recorded them clearly.
In addition, before the interview, I collected and read a lot of information on Java blogs and friends who entered Dachang. After asking for permission, I decided to send it out, hoping to help brothers who have similar experiences with me or who want to enter Dachang. It’s free here. Share it with everyone!
Byte Beat Interview Questions
Ali interview questions
Meituan Interview Questions
Due to limited space, I will not put them in the article one by one. The study notes and interview question sets of the article content are available for everyone to learn for free. 100% free access method: forward + comment on the article, private message me.
At last
The following information is basically provided for me to learn from bloggers’ friends. In our exchanges, they never laughed at me as a junior college student or dreaming of entering a big factory. They only think that everyone is learning computer and having a sense of the Internet. Interested like-minded friends, can provide help and work hard together.
No matter how many times I have read the messages or comments of "black" college students, I just want to tell my friends who are also college students who want to enter the big factory, don't care what others think, just study hard. There is a lack of academic qualifications. You need to work hard to fill it back. Do whatever you want.
Finally, there is nothing difficult in the world, I am afraid that the old saying of the caring people will always be used!