preface
I am preparing for the interview recently, and then reviewing the projects, books, notes and articles I have written before. A look at a lot of knowledge points are not impressed, the most patable is even their own in order to prevent forgetting to write the article actually feel not written by themselves. Some are beginning to doubt life.
All right, without further ado, it’s the height of job hunting, so I’m sharing what I’ve gathered. And a good job at home. (Materials in this paper are suitable for 1-3 years)
From the basic level to the architecture level, it covers the questions asked in the interview of Tencent, Bytedance, Xiaomi, Ali, Didi, Meituan, 58, Pindoduo, 360, Sina, Sohu and other first-tier Internet companies, and covers the advanced Android technology points in junior high school.
Listed in the article is mainly the outline part, the details can be obtained at the end of the article!
If you master the points listed in this article, you will greatly increase your chances of passing the first two rounds of technical interviews. These contents are for everyone’s reference and mutual learning.
Chapter 1 Network interview questions
1, HTTP protocol 2, TCP/IP protocol 3, TCP three handshake and four wave understanding and interview question 4. The entire process from entering the URL to rendering the entire interface, and what protocol is used in the process? 5. What is the difference between TCP and UDP? 7. The format of HTTP request and response packets, and common status code 8. How many HTTP requests can be sent over a TCP connection
Chapter 2 Data structure and algorithm interview questions
1.1.1 What are the commonly used data structures? 1.1.2 Array 1.1.3 Linked list 1.1.4 Queue & Stack 1.1.5 binary tree 1.1.6 HashMap 1.1.7 Figure 1.1.8 What are the sorting algorithms? 1.1.9 Search Algorithm 1.1.10 String 1.1.12 Other algorithms
Chapter 3 Java interview questions
- HashMap
2.ArrayList
3.LinkedList
4.Hashset source code analysis
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The memory model
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Garbage Collection algorithm (JVM)
7. What is the difference between garbage collection and system.gc ()?
- Class loading process
9. The reflection
10. Multithreading and thread pools
11. Create multi-thread mode and working principle of thread pool
12. Design patterns (six basic principles, common design patterns in projects, handwritten singletons, etc.)
13. Resumable data
14. Four Java references
15. Java generics
- The difference between final, finally and Finalize
17. The difference between interface and abstract class
18. Discuss the application of abstract classes and interfaces from the design of Java container classes
19. Difference between synchronized and lock
Chapter 4 Android interview questions
1. Start the Activity mode
2. Start the Activity
3. Process communication
4. Summary and analysis of Android Binder application layer
5. Process survival method
6. Understand handler Looper and messageQueue ideas from source code
Postdelay (); postdelay();
8. Why doesn’t the main thread in Android freeze because of the dead loop in looper.loop ()?
9.RxJava principle and how to package and use
10. Okhttp source code analysis
11. Retrofit source code analysis
12.LeakCanary source code
13. Use and principle of LruCache
14. ARouter principle
15. Annotation framework implementation principle
16. How does Android write projects based on compile-time annotations
17.RxJava2+Retrofit2+OkHttp3 foundation, encapsulation and use in projects
18.Rxjava2.0+Retrofit+Okhttp(encapsulation use)+MVP framework construction
19.Android plug-in and hot repair knowledge sorting
20. Common memory leak problems and solutions in Android development
21. How do I detect and locate Android memory leaks
22. Image occupied memory algorithm
23. Why soft references for images, weak references for the VIEW interface in MVP mode
24. MVVM practices based on DataBinding and LiveData
25.App stability optimization
26. Optimized App startup speed
27.App memory optimization
28.App drawing optimization
29. The App
30. Network optimization
31.App battery optimization
32. Security optimization for Android
33. Why does WebView load slowly?
34. How to optimize a custom View
The last
Interview is the most direct and effective way to change jobs and raise salary. Prepare for 2021 golden Three Silver four. Are you ready for the interview?
Master these knowledge points, the interview in the candidates and can dazzle many, hit 9999 points. Opportunities are reserved for those who are prepared. Only with sufficient preparation can you stand out among the candidates.
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