Complete interview questions for interviewers and senior Android engineers in front-line Internet enterprises

Preface

The length of the article is long , It is recommended to eat patiently , Believe it will help you . It's not easy to code words , If there is any mistake , Welcome to point out .

The first part is the interview experience , The following part is the attached problem notes / Recommended answer / Books .

My wechat trumpet has a special group of friends . They come from  CSDN See my previous post on 《 From Ali to NetEase , A non 985/211 One year job search for fresh undergraduate students 》 Leave an email to ask for interview information , After I sent the information in the email, we added wechat to meet each other and chatted .

Last week , Several of them came to me through wechat and asked me some questions about looking for a job , Including what skills will be asked during the interview , How to better answer , How to choose job opportunities and so on . Their employment anxiety can be clearly felt in communication with them . On the one hand, I am worried about the impact of the epidemic , The company you want shrinks or doesn't recruit ; On the other hand, they are not confident in their own technology , Worry about not passing the interview . I understand them very well .

Last week, , I have a friend I used to know in Shuai planet Zhang , Also in Guangzhou . He left the company because of problems with the company's financing years ago , I'm looking for a job now . He asked about the technical problems encountered in the interview and how to treat and answer them . We communicated for two days , In response to his questions, I gave the written answers and reference schemes one by one , Gave me the knowledge system of previous interview preparation and simulated answers to each question with voice details , I hope he can gain some new knowledge and answer skills . Although we have never met , But I really hope he can find his favorite job .

30 Not every programmer has to do this , Only a few are not interested in programming , People who are not good at programming themselves will be forced to make changes . And the real technocrats , For people who are interested in programming , Age is never a problem .

that , These in 30 Programmers who are forced to make changes , Because of what ？

One 、 It is decided by the development of the enterprise . 

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The characteristic of the Internet industry is that the iteration speed is very fast , Technology is developing very fast , Therefore, enterprises in the industry want to achieve stable and healthy development , We must have our own characteristics , Keep innovating , Keep up with the development trend of the times , Otherwise, it will be eliminated by the society , For example, some time ago , China “ Shoe king ” The fall of the rich bird .

The age of science and technology , If traditional industries don't change with the development of Internet , It's easy to be replaced by other similar products , And the development strategy of the enterprise , Most of them determine the development of some programmers .

Two 、 Technological innovation is very fast .

A project from the needs of research and Analysis 、 To product design and development 、 And then to product realization , In the process of going online smoothly, the requirements for programmers are very high . meanwhile ,IT The competition between practitioners is very fierce , This kind of competition requires programmers to have more solid basic skills 、 Have a better understanding of the business 、 You have to be very flexible .

The company's projects are constantly changing with the development of the industry , The previous project still uses this technology , The next project may use new technologies to solve problems , So it will force a lot of programmers to keep learning , Keep updating your knowledge system . And for programmers , Because their industry is special , The content of their work is also very creative , So it also requires them to be ready for change all the time .

The birth of new technology means the elimination of certain languages and technologies , If you stubbornly only want to defend their own one acre three percent and do not want to change , Don't take the initiative to adapt to the needs of new projects , Then you are the only one who will be eliminated .

3、 ... and 、 With age, thinking is defined .

Experienced programmers compare with some young programmers , It does have its own advantages . But being young also means you're more energetic , Think more quickly , There's more plasticity . The main reason many companies are more willing to hire young people is that they can understand something faster , At the same time, the salary requirements are lower . And older programs, after years of work , Although they are more capable of working , But they also have certain thinking inertia and inertia , In my work, when I encounter some programming problems with large quantities or difficulties , A lot of older programmers don't try , Instead, they choose to throw it away , No solution .

Four 、 Work enthusiasm is decreasing year by year .

Whether it's as a programmer or in other industries , A lot of people have an obvious feeling , At the beginning of entering the workplace to work , We are the most active to learn 、 When it comes to solving problems . When we work in the workplace for a few years , Our enthusiasm for work is gradually worn away , Although many problems have been solved , I have gained some experience , But when it comes to new problems, it forms a kind of inertia , Not willing to jump out of the comfort zone .

Over the years, with the development of the industry , A lot of people change careers IT, The number of programmers is growing , Among them , Some people like the program very much , So they spend more time spontaneously studying programs , To learn some new technology ; And for some people , They entered the industry just for high salary , So working in this industry for a few years, when you get older , They will naturally feel more and more disgusted with what they are doing in this industry , I also want to leave this industry as soon as possible .

Whether it's programming or other work , Many of the reasons are interlinked , If you're very interested in what you're doing right now , No matter how old you are , You learn a lot of things spontaneously , You can always climb to the top of the industry pyramid ; On the contrary, you will feel confused more easily , Finally, he was forced to be eliminated under confusion and pressure .

Finally, in order to help you understand Android The principle of relevant knowledge points and interview related knowledge , Here's what I've collected 24 set

tencent 、 Bytes to beat 、 Ali 、 Baidu 2020-2021 Analysis of the real interview questions

, I organized the technical points into

Video and PDF

（ In fact, it took a lot more energy than expected ）, package

The context of knowledge  +  A lot of details

.

also ?

Advanced architecture technology advanced brain map 、Android Develop interview materials

? To help you learn and upgrade , It also saves time for people to search information on the Internet to learn , You can also share it with your friends and learn together .

Online learning  Android A lot of information , But if the knowledge learned is not systematic , When you encounter a problem, you just have a taste of it , No further study , So it's hard to really improve the technology . I hope this systematic technical system has a direction reference for you .