Bat Android Engineer interview process analysis + restore the most authentic and complete first-line company interview questions

A round of interviews ：

This interview is generally a basic interview , There are mainly projects leader Come for an interview , Mostly java Most of the topics are , Android also involves some basic issues , This link is also critical , Generally, we don't ask about projects we are familiar with

Most of them are preliminary explorations of some basic skills , The interviewer will look at your written examination paper and ask questions ,

Remember Baidu T3 Interview questions , Among them, I also joined the interview questions of other listed companies , I hope you found that useful

PS; The order is not necessarily correct

1  ANR What are the specific types , Specifically, the maximum timeout it generates .

2   The process of multi-threaded and multi-point downloading

3 http Understanding and usage of the agreement

4 Android solves the problem of thread concurrency

5 What data structures do you know , Let's talk about the specific implementation mechanism

6 How to convert hexadecimal data to decimal and binary

7 On the right JavaOOP Polymorphism in understanding

8  activty and Fragmengt How to communicate with each other , Fragmengt and Fragmengt How to communicate

9 How to keep your process from being killed by third-party applications , How can the system start after it is killed .

10 Let's talk about some problems that we should pay attention to in normal development ,

answer ： You can say it well svn The details of the , And code specification , And some security information problems

11 Customize view Efficiency is higher than xml Definition ？ Explain why .

12 There are several kinds of radio registration , What are the advantages and disadvantages of each

13 There are several types of service startup , Service and activty How to communicate with each other , How services communicate with each other

14 What are the main aspects of layout optimization ？ Specific optimization ？

15 Knowledge of databases , Including local database optimization points .

One side is about half an hour , The problems are generally broad , But it won't involve too many deep problems , Just check me java Foundation and Android development APP The necessary basic ability , In this part, the interviewer will not ask you why

quit , Why choose our company and so on , But the company will let you introduce yourself .

Two rounds of interviews ：

The interview at this stage is generally for the technical manager or director , The main technical points to ask depend on your resume to write the necessary skills interview , So when we write our resume, don't write it blindly , Don't write it down if you won't , Otherwise, you won't , This will greatly reduce the certification of your technical ability , Because the interviewer will think you will and will not , No, you won't , So write your resume according to the direction you are good at ,

The interviewer will also take the initiative to ask what you are good at , It mainly depends on your previous work experience and what modules you have done , But the initiative is still under our control , We can get off the subject , Go to the knowledge point that you can .

The main thing is to tap your technical skills . The interview topic is generally

1   Android event distribution mechanism , Please describe the whole process in detail

2 Android view Drawing mechanism and loading process , Please describe the whole process in detail

3 activty Loading process of Please tell me more about （ Not life cycle remember ）

4 Android uses an automatic garbage collection mechanism , Please talk about the principle of Android memory management

5   Let's talk about Android virtual machines and java The principle and difference of virtual machine

6 What is the general implementation of secure queues in multithreading ？ Thread pool principle ？（java）

7 Android rights management , Why register permissions in the list , Android APP You can use , On the contrary, we can't （ operating system ）

8  socket How to realize short-term reconnection , How is the heartbeat mechanism realized , What are the four handshake steps （ Principle of network communication ）

9 http in TCP and UDP What's the difference , Under the said HTTP Requested IP Message structure （ computer network ）

10 What do you know about secure encryption ？   （ If you say an encryption , The interviewer will then follow up with questions , So you have to be able to , If you can't recite it ）（ Security encryption ）

11   You know the data storage structure ？ Internal mechanism of stack and linked list .（ data structure ）

12 Under the said Linux Difference between process and thread . Process scheduling priority , and cpu Scheduling process relationship .（ operating system ）

13 Please elaborate on a design pattern you know , And explain java High cohesion and low coupling .

14  spring Reflection and proxy of , Application scenarios in Android （ Plug ins and ROM Data frame ）

15 JNI During invocation Confused questions

16 Have you seen the Android source code , Please name one you have seen API Or build internal principles . 17 Why do you leave   Attitude towards overtime

18 What are you good at , Made those things .

Okay , Sum up some , At this stage, just ask deep questions , The first three questions should be as detailed as possible when it comes to code methods , Light theory is useless , It mainly depends on whether you have accumulated , Have real project experience , The following questions mainly depend on whether you are from a major , As long as it involves computer networks , data structure , linear algebra , operating system , Security cryptography , Software modeling , Design mode, etc , If you have taken these courses in College , Then some non Android common development problems at this stage , I guess you can answer again , In view of many training schools , Then please prepare these theoretical knowledge first , Because it's related to your salary , Grading problem , Because half of the work done in different grades is the same , Why take less treatment than others for these routine problems , commonly BAt Interview will be recorded , The next round of interviewers will look at the records and comments of an interviewer .

This stage is very critical , Directly affect your technical rating , The interviewer has known your technical background , For example, you have been ordered T4, How good you are in the back , It's estimated that it can't be changed , Unless Hr I can give you more salary .

Three rounds of interviews ：

At this stage, as long as the interview is at the level of department manager , There are technical and non-technical problems , It mainly depends on whether the interviewer has technical background , According to my experience and the habits of Baidu , Most of them have technical background , But the technology they know is old , So the questions asked are mostly one-sided and written questions , Even if you ask questions in two aspects , It will not be as detailed as a certain method , This interview mainly depends on your communication ability and management and coordination ability , It also depends on your stability , The atmosphere at this time will not be as serious as one side and two sides , It eased slightly , If there is no accident, you have a great possibility of admission .

• LRUCache principle

• How to load pictures

• Modular implementation （ benefits , reason ）

• JVM

• Encrypted video transmission

• Count the starting time , standard

• How to keep the application stable

• ThreadLocal principle

• Talk about classloader

• Dynamic layout

• Hot repair , pluggable

• HashMap Source code ,SpareArray principle

• performance optimization , How to make sure that the app doesn't get stuck when it starts

• How to remove duplicate code

• SP Is it process synchronization ? What's the way to synchronize

• introduce SurfView

Total cleanliness ： This stage is generally non-technical , It mainly depends on your thoughts and personal attitude direction , And the last question also determines whether the leadership depends on your leadership ability , Don't ask the company how much overtime you work in the first sentence

How about the company benefits , Company activities, etc , Which Internet company doesn't work overtime , Especially in large companies, overtime is more serious . You can ask how many people are in the project team , Mainly in what direction , What is the goal in one year , How about the team atmosphere , And so on .

Hr interview ：

Okay Here you leave BAT The gate of is very close , As long as there is no fork , Don't overcharge , Then you are safe , At this stage, personnel will ask why you left , Where did you go to college , Some details of the company in the past

Don't be vague , Don't be smart with big companies hr Play tricks , We can't compare , I mainly sort out the following questions , This stage is not much different from ordinary companies .

1 Why leave

2 What do you think of overtime

3   How did you feel about the previous interview .

4 Self evaluate your strengths and weaknesses

5 How do you plan for the next few years

All in all Hr Will talk nonsense with you , But don't take it lightly , I hung up here at vipshop . Don't talk nonsense hr Don't ask things , Don't expose your extreme side , This stage hr It will be based on your performance and the technical level of technical feedback , Make a preliminary rating with the treatment of previous employees and your project experience , The salary you expect will be raised in advance , Of course, you can know in advance BAT The salary range of , Then put forward a reasonable range according to your performance ,Hr Usually bargain , It depends on your persistence , Psychological warfare is very important , After you discuss the salary and the term of the contract , This year's interview usually ends , I won't inform you that day offer,

There is also the possibility of retesting , It is usually one week after the interview , Three face interview is usually a single interview , The second interview is usually for more than two people , Mainly in technology , Then the technology is over ,hr I won't interview .

If you don't have a second interview , Usually within a week offer, If you are arranged for a second interview , About a week later offer

Summary of interview details ：

1 If after the telephone interview , I didn't inform you of the interview within three days , Then you're 90% dead ,

2 End or terminate the interview , The interviewer told you to go back , You also hung up ,

3   If the two sides are over , Let you go back , Or three sides didn't ask many questions , You are percent 60 Hang up ,

4   The interviewer didn't ask much at the end of three sides or in three sides , you 40% Hang up ,

5 If there is no arrangement Hr interview    You are only 50% The possibility of ,

6 If HR I didn't talk about salary , Do you have 30% It's possible to hang

7   The company is finished Inform you of the second exam Do you have 20% It's possible to hang

8   If the salary is over , Say I will reply to you within three days, then you have 15% Probably .

9   If the salary is over , Say there is no news in a week , Probably you hung up , Find another way .

Suggest

Review skills

I always think there is no shortcut to study . I believe in " Better a good memory than a bad pen ", I believe in " Reading a book a hundred times ".

Be sure to practice . For programmers , It's not just rote learning , We have better ways to learn , Like writing demo To verify , For example, in the process of learning the source code , Be sure to look at the source code yourself , I'll read it a few more times .

Take notes while learning . I think study notes are very important , It's not just taking notes , I also need to write my experience , Text notes 、 drawing 、 Summarize, etc , There are many ways , But do it yourself , Don't trust your memory too much , It's just repetition , Better understanding .

What、How、Why. In the process of learning knowledge , Can follow What、How、Why This three axe . That is, what this thing is ？ How it's done ？ Why does it do this , What is the principle , Is there a better way ？

Last

May you one day , Love yourself , Treat yourself .

This article is on the open source project ：Android Development doesn't do that ？ How to get a high salary in an interview   Has been included in , It contains different directions of self-learning programming route 、 Interview question set / Face the 、 And a series of technical articles , Resources are constantly updated …