Preface
2020 is a year of turning point. Due to the epidemic in the first half of the year, many friends who studied android development lost their jobs. Although they found a job, they didn’t make the difference. In the second half of the year, Gold, Nine, Silver, and Ten have ideas to change a job, and there are a lot of needs. Dachang interview experience and the real interview questions of Dachang, want to prepare for the next question in advance. Next, I will share my interview experience and summary of big companies such as Bytedance, Alibaba, Baidu, Xiaomi and so on. (Enclosed at the end of the article is a complete analysis of real questions)
- Ali (rejected)
- Byte beating (offer)
- Xiaomi (offer)
- Hand hundred (offer)
Let's share the interview questions of each company below
IQIYI
1. Android message mechanism 2. Android View drawing process, what is executed when a TextView instance calls the setText() method
3. Android dalvik virtual machine and Art virtual machine optimization upgrade points
4. Android screen rendering mechanism
5. Hot fix The principle, you have known which kinds of hot fix frameworks
6. OkHttp principle
7. Android thread pool implementation principle
8. JavaGC mechanism
9. HashMap implementation mechanism, how to HashMap thread safety
10. Implementation of reentrant lock , What is the definition of fair lock and unfair lock?
11. Have you used those commonly used data structures, and talk about your understanding of trees?
12.Activity startup mode, allowReparent features and stack affinity
13. WebView optimization
14. Is there any experience
in using Jni 15. Have you ever used RxJava?
16. Tell me about your understanding of design patterns, which design patterns are mainly used in the development process?
17. Hurry up and write, do you understand dynamic programming?
Millet
1. The realization of the linked list of bubble sorting
2. Write a quick row
3. Write a singleton mode
4. Activity startup mode
5. Abnormal life cycle
6. From clicking the application icon to entering the application, what work does the Android system do, during What are the process switching involved?
7. Tell me about the IPC method you know
8. Talk about the general implementation of Binder
9. How to control the View display of another process
10. How to make network requests in broadcast
11. Talk about the implementation of thread pool in Android
12. HashMap if Hash How to resolve conflicts?
13. Two threads print 12121212 through thread synchronization...
Tencent
1. How is HTTPS implemented?
2. The relationship between Android event delivery process and OnTouchListener 3.
Activity startup mode
4. Android thread pool implementation principle
5. Two-finger zoom and drag the big picture
6. Client network security implementation
7. Webview optimization
8. Android application keep alive
9. RemoteViews implementation and usage scenarios
10. RecyclerView drawing steps and reuse mechanism
11. Binder's general design pattern
12. Activity follows what design pattern
13. EventBus source code analysis, what design pattern
follows 14. Handler why memory leak
occurs 15. Java memory Module partitioning and GC mechanism, what are the GC algorithms
16. Finalize mechanism
17. The difference and usage scenarios of strong references, weak references, soft references, and virtual references
18. The use and implementation principle of LeakCanary
19. Introduce the design you use in the development process Mode
20. Quick row
21. Handling of numerous error codes of the server (there are tens of thousands of error codes)
Ali
1. Android message mechanism 2. Android event delivery process
3. Android View drawing process
4. Activity startup mode
5. Android IPC mechanism
6. Android thread pool design principle
7. EventBus source code and design mode
8. Android application keep alive
9. Android UI optimization
10. Android startup optimization
11. Fast row heap row single case
12. Process thread implementation in the operating system
13. What is the composition of HTTPS?
14. The parents
of ClassLoader entrusted 15. The ClassLoader
in Android 16. Have you ever used Jni?
17. Have cross-platform development experience?
Today's headlines
1. Video encryption
2. Android Native Crash
3. Video composition
4. Player principle
At last
The preferred method of introducting resumes is fast and efficient! Then you can look at it on the hook, boss, Maimai, and street. It is stated on the resume that if you are familiar with any technology, you must be familiar with it, otherwise it will not be very embarrassing to be asked! What project you have done, even if the project volume is not large, you must be familiar with the realization principle! If you are not responsible for the part, you can also see how your colleague achieves it. What would you do if you do it for you? What has been done and what will be the breadth issue depends on the content of the project. But what has been done and what state has been reached is a matter of depth, which has to do with personal learning ability and problem-solving attitude. Large companies look at depth, small companies look at breadth. You will be able to interview for large companies, and will you use what they interview for small companies, that is, job matching.
The interview process must be polite! Even if you feel that the interviewer does not respect you and often interrupts your explanation, or you feel that he is inferior to you and the questions asked lack professionalism, you must also respect him. Who told him to choose you now and wait for you to get the offer Then you choose him.
In addition, it must be slow to describe the problem! Don't talk about it all at once. It seems that you are calm and confident, and you still have time to react to your ideas on how to say better next. Nowadays, there are too many developments that rely on IDEs, so there will be a drawback. When we explain in an interview, it is easy to not know how to read a certain method. This is a flaw... So we must deal with common key class names, method names, and key Read the words accurately, and some interviewers will be impatient and say, "Which one are you talking about?" At this time, we will easily get confused. Correct pronunciation + calm description + nice voice is definitely a plus!
The most important thing is mentality! Mentality! Mentality! Say important things three times! The interview time is very short, and it is still relatively unrealistic for the other party to find out your foundation in a short period of time. Therefore, sometimes it is also a time to look at the eye. This is still the era of looking at the face.
I hope everyone can find a job that suits them and satisfies them!
If you need the PDF version, you can pick it up on GitHub!
Advanced learning video
Attached: We collected 20 sets of real Android interview questions for first- and second-tier Internet companies (including BAT, Xiaomi, Huawei, Meituan, Didi) and my own Android review notes (including Android basic knowledge points and Android extensions). Knowledge points, Android source code analysis, summary of design patterns, Gradle knowledge points, summary of common algorithm questions.)
Organize Android review notes (including Android basic knowledge points, Android extension knowledge points, Android source code analysis, summary of design patterns, knowledge points of Gradle, summary of common algorithm questions.)
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