[Java interview experience sharing] Those "hidden rules" in java interview, see if this is the reason why you failed the interview!

Pay attention, don’t get lost; continue to update Java related technologies and information! ! !
The content comes from the contributions of group friends! Thanks for the support!

Preface

Unspoken rule 1: The essence of an interview is not an exam, but to tell the interviewer what you will do

A mistake made by many newcomers is particularly easy. They don’t know what the interviewer wants to ask. In fact, the interviewer didn’t think about what you meant during the whole interview, but just wanted to know what you would do by asking questions.

such as:

The interviewer asked how do you use caching in actual projects?

Newbie answer: use redis, key-value storage

But the interviewer may want to know: what kind of data is generally cached in the business, why should this data be cached, how to cache the data to ensure real-time performance, if the cache is invalid, what impact will the normal business process, why choose redis, redis Implementation principle and so on;

As long as you can answer this topic very deeply and thoroughly in a certain aspect, the possibility of generalization will be greatly improved;

If when you hear this topic, you don’t know how to go back, or if it feels very simple, and you can finish talking in a few sentences, then it is basically difficult for you to talk about it because you don’t have enough knowledge to tell you about the technology. Related content.

Unspoken rule 2: higher salary requirements, higher admission probability

I once interviewed a college student who had just graduated. The resume wrote that he was proficient in java, proficient in mysql, and proficient in spring. Then I asked him what salary do you expect?

His answer is 4K. Let’s not say whether what he wrote on his resume is true or false, but one thing is clear. If you go to the market, others will sell it for 30 yuan per catty, and there is a stall on the side of the road. 10 yuan a catty, will you buy it?

In addition, what I want to tell you is that, generally speaking, for a formal Internet company, it really doesn't care about paying more, the most important thing is talent;

Or let’s think about it in another way. Suppose you are a project manager and you come to hire people to help you do things. You will save a little salary, hire poor technicians, help the boss save costs, take your time and bring people to yourself, find yourself A lot of things?

Moreover, from the psychological point of view, people generally only focus on one point. If you expect a higher salary, then when he considers whether to admit you or not, what he considers is the salary issue, or the technical issue, but the salary It’s from the boss and the technology is used by yourself. So in a certain way, if there are a few people with similar skills to you, but subconsciously, you will think your skills are better because of your high salary expectations, and finally you will be admitted. Just like suppose we ask to buy a down garment, and at the same time we are interested in two, one is 800 yuan and the other is 1,000 yuan. I believe most people will think that the 1,000 yuan one is of better quality, if you add this You didn’t pay for a piece of clothing, so which one would you choose?

Finally, I remind everyone that expecting a higher salary does not mean that there is no boundary. So how much is appropriate?

Can be considered from two aspects. One is the working life. Generally speaking

First entry: 8K to 12K

1 year to 2 years: 10K to 15K

3 years to 5 years: 13K to 22K

Over 5 years: over 18K

Of course, there are some differences in different regions, but the difference should not be big

Another aspect is to refer to the work standards of large companies, open the recruitment information, and view the recruitment information of large companies. Generally speaking, an interval value is given. You can multiply the value with the largest interval value by 80% as your expected salary Reference value

such as:

24*0.8=19.2 then the expected salary of 19K is more appropriate

Unspoken rule 3: There are many difficult aspects of skills listed on the resume

Here I will briefly explain why (we will explain in detail in the video course). There are many skills listed on the resume that can reflect the following questions:

1. I don’t know what the core technology of a java engineer is. The first impression I give the interviewer is: layman;
2. The more skills listed, the more directions the interviewer can ask. It is difficult for you to be proficient in everything. In the end, you will only know how to ask every skill.
3. It completely reveals that you don't have any work experience. I have seen some who write proficiency in office software, foreign language level, and computer level two on it;

So how should interview skills be written here?

Judging from personal experience and interview feedback from trainees, personal suggestions are as follows:

1. Write two proficient or in-depth research technical points, such as: multi-threaded high concurrency, in-depth research on jvm, etc.;
2. Write three proficient applications, this is best to write commonly used frameworks, such as: SSM, etc.;
3. Write three familiar and easy-to-use skills, such as automated deployment, full-text search, front-end related frameworks, etc.;

In short, the skills column should subconsciously guide the interviewer to ask you the topics you have prepared;

Unspoken rule 4: If you can’t do the written test, it will not have a big impact. The key is to show that you are taking it seriously

First of all, everyone should understand that when you take the written test seriously, whether the written test is done well or not, right or wrong, does not actually have a big impact. Note that I am taking the written test seriously;

This is estimated to be difficult for people without many years of work experience or team development experience. In fact, most interviewers recruit people to focus on the following three points:

1. Can you talk
2. Subjective initiative
3. logical thinking

Note: I am not here that people without any basic knowledge can interview with the above three points, but it is easy to interview if the above three points are met when they have basically programmed;

Unspoken rule 5: Be confident of yourself, the interviewer just arrives at the company a few months earlier than you

First of all, to emphasize that being confident in yourself is not disrespecting the interviewer;

The core idea expressed here is that throughout the interview, you have to make people feel that you and the interviewer are equal, the interviewer is choosing you, and you are also choosing the company;

Unspoken rule 6: Do not write fake resumes, but you must use your strengths and avoid weaknesses

In fact, this is how we often say how to pack resumes, and honestly will always suffer;

Being honest and trustworthy and not writing fake resumes is the most basic professional ethics;

However, it is necessary to promote strengths and avoid weaknesses, and to appropriately exaggerate their abilities. This is just like a company promoting its products to the outside world;

Well, this is not good for me to make a long discussion in public. We often first understand the situation of the students in a specific and practical way, and then suggest how to package the resumes according to the actual situation;

Unspoken rule 7: The boss is a human being. When talking about ideals, don't be hypocritical and be honest

This is usually the last part of the interview,

You must let people feel that you are a sincere and hard-working technician,

Don’t let people feel that you are an impetuous person with sharp eyes and low hands;

Unspoken Rule 8: You must be fully prepared if you don’t fight an unsure battle

This is a very, very important part of whether the interview is smooth, and it is also the most common mistake that many impetuous students make.

Its core idea is actually: the interview must be systematically and seriously prepared!

Say the important thing 3 times

The interview must be systematically and carefully prepared!

The interview must be systematically and carefully prepared!

The interview must be systematically and carefully prepared!

How to make systematic and serious preparations?

The following 7 steps are summarized in the actual experience of the tutoring students, and are provided for your reference

1. The most basic conditions, proficiently completing CRUD+Advanced query+Pagination+Login+Registration+Logout+Purchase+Order under the ssm structure
2. Systematic knowledge points, systematically sort out the knowledge points and systematically look at the interview questions, and forcibly divide the knowledge points into 3 categories, proficient, proficient, and understanding. Don’t look at it, and finally let it Your impetuous heart collapsed directly in the interview
3. Write a resume, the resume must reflect technical points in a prominent position (recognize a few keywords in hr and decide whether to notify you for an interview). If the invitation rate of the posted resume is less than 60%, it must be a problem with the resume writing , It’s best to find a professional to help you look at your resume
4. Mock interviews (three times) to improve the interview pass rate. The cost of the interview is actually quite high. I finally received the notice of the interview. I worked hard to find the way to the interview. If you make a regular low-level mistake, it is actually not cost-effective. If you find a job one day earlier, you earn one day earlier. Money (The average salary of programmers is around 500 a day)
5. Practice interviews (5 actual interviews), go out for interviews, but the purpose is not to face, but to relax you, not be nervous, and get used to technical communication with the interviewer (in fact, many students will get an offer at this stage ), immediately after the interview, recall and record the questions asked in the interview and how you answered them in general, and then discuss with professionals whether this answer is appropriate. You must ensure that you will answer better next time you encounter similar questions, otherwise there will be many interviews The number of times will not improve, because the interviewer will not point you out where you answered badly or obviously wrong. This is why, many people go out for the interview and say that they have answered well, and then let him wait for notice ,then. . . There's no after that
6. For formal interviews, similarly, communicate with professionals immediately after each interview. In the end, you will find that the questions asked by each interviewer are the same. You will feel that the interview is easy! When you get multiple offers, then choose one of them. It feels like walking to the pinnacle of life!
7. Through the trial period, although it is said that interviews are made to build aircraft and work screws, it is estimated that for those who are just entering the industry, there are still many technologies that have not been contacted or understood. At this time, you must ask more if you don’t understand. Ask a colleague. If you are technically, you must first google it. If you still don’t understand, you should ask more professionals. If you really don’t understand, then ask a colleague. All in all, you must be proactive!

Unspoken rule 9: The premise of choice is greater than effort is to have enough effort before there is a choice

Many people are advocating that choice is greater than effort, but the more important thing is often easier to be overlooked, that is: only enough effort will have a choice.

This forms an endless loop, or in our programmer's terminology: deadlock, choosing a good company to work is very important to your development prospects, but the premise is that you can get an offer from a good company!

Unspoken rule 10: Life is too short, never stop, you must go to the company you really want to go to

I have met many students or students. When chatting with them, they all have a similar heart: they don't want to work here at all, but the job is not easy to find, so they have to do it temporarily, which lasts for several years;

What kind of torment it is to go to work with an unwilling mood every day, and I believe it is difficult to make excellent results, at best, I will not be forced to complete the work. What is the point of doing this!

to sum up

The above is a summary of personal work experience, not necessarily completely correct, but it must be a summary of actual experience and reflections from the heart!
Here are some interview questions from major factories, as well as some good resumes. You can share them for free. If you need them, you can click here to get them. Those who


need the above interview questions and resume template materials can click here to get them for free.