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Preface
The gold three silver four job-hopping seasons of the workplace are here again. The difference is that this year is "colder" than previous years, and the form is more severe. You may hear or see some information, that is, many companies are optimizing layoffs. For job seekers, the interview is a hurdle. Many people are afraid of interviews. Even veterans who have worked for many years may still have interview anxiety.
These questions are the questions I asked in my previous interviews with first-line Internet companies such as Tencent, Huya, Meituan, Ali, and Kuaishou. Familiarity with the knowledge points listed in this article will greatly increase the chance of passing the first two rounds of technical interviews.
Due to the large number of interview questions involved, the length of the space is longer. Based on the frequently asked questions involved in these interview questions, I have summarized and made a roadmap for advanced learning. Share with everyone, there is a free way at the end of the article!
Face sharing
Ali side
1. Self-introduction
2. What projects have been done and what technologies have been used
3. Four major components
4. Activity life cycle
5. Start mode
6. Thread status
7. Network protocol (each layer, as well as TCP and UDP)
8. Will network programming
9.handler 10.
JVM, memory model
11.GC mechanism (what are the methods and problems)
12. The database in the project
13. HashMap, HashTable, ConcurrentHashMap1
14. Rhetorical link
Ali two sides
1. Self-introduction
2. TCP and UDP and application scenarios (three-way handshake and four waves are basically asked)
3. Algorithmic question: the problem of string segmentation according to dictionary. The time complexity of the solution given at the beginning is too high, and it has been required to be optimized.
4. Introduce the projects you have done, and keep asking questions along the project (focus on the problems encountered and solutions)
5. Binder communication mechanism
6. The pros and cons of
React Native and native development 7. View event distribution mechanism and View drawing Principle
8. Rhetorical questions, chat sessions There are
more follow-up questions, but there is nothing difficult, there is nothing I can't answer a word.
Ali three sides
1. Self-introduction
2. What is the difference between broadcast and EventBus?
3. Build your own picture loading framework, how to do
4. Bitmap memory calculation method, efficiently load
5. Binder communication process? The principle of Binder? The advantages and disadvantages of other IPC methods?
6. The underlying implementation principle of
handler 7. RxJava various operators and design ideas.
8. Caton optimization, principle, operation
9. What optimizations have been made? How to achieve, what problems encountered, how to solve
10. Questions and exchanges
Ali all around
1. How much source code have you seen
2. The caching mechanism, dex loading process, and the principle of componentization in the network protocol okhttp;
3. MVC MVP MVVM principle and difference
4. If you were to implement a debugger, how would you design it? Static debugging? What about dynamic debugging?
5. Hot fix, plug-in, componentization
6. Android Framework source code
7. What design patterns have you used? Talk about the specific scene at that time. Why do you use method factories, the other two?
8. The difference between the advantages and disadvantages of kotlin and flutter, how much to master
9. What do you want to ask me
Ali Five Faces (hr)
1. Project
2. Planning
3. The project is about to be reported, and there is a problem with the PPT, what will you do
4. Salary
5. Questions
At last
For Android programmers, I have compiled some materials for you, including not limited to advanced UI, performance optimization, architect courses, NDK, hybrid development (ReactNative+Weex) WeChat applets, Flutter and other all aspects of Android advanced Practice technology; I hope to help you, and save everyone's time to search for information on the Internet to learn. You can also share the dynamics with friends around you to learn together!
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Android Frontier Technology Outline
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Full set of systematic high-level architecture videos
Information collection: Like + click GitHub to get it for free
Previous Android advanced architecture materials, source code, notes, videos. Advanced UI, performance optimization, architect courses, hybrid development (ReactNative+Weex) all aspects of Android advanced practical technology, and there are technical experts in the group to discuss and solve problems together.
Architecture information, source code, notes, videos. Advanced UI, performance optimization, architect courses, hybrid development (ReactNative+Weex) all aspects of Android advanced practical technology, and there are technical experts in the group to discuss and solve problems together. **