foreword
I heard that the 24th class has not found an internship, so it collapsed?
Are you broken? Anxious? Insomnia? Hair loss?
In fact, it’s only April, and the internship recruitment has just kicked off. “Unified recruitment” is just a call for form over substance.
From May to June, all kinds of supplementary recruitment and casual recruitment are the peak of recruitment, and also the peak of getting offers. There are many opportunities.
Pessimists are often right, but optimists are often successful. Don't create anxiety to scare yourself.
Prepare more for the interview, and seize the opportunities!
The following are some of the most common questions asked by first-tier Internet companies. If you are interviewing for an Android senior engineer position, it is almost a must-ask interview question :
1. Can a new Handler be directly created in the sub-thread, and why the main thread can do so?
2. The cause of the memory leak caused by the Handler and its solution.
3. A thread can have several Handlers, several Loopers, and several MessageQueue objects.
4. Message objects What are the creation methods & differences
5. What are the methods of sending messages in Handler
6. The difference between post and sendMessage of Handler and the application scenarios
7. What changes in the message queue after handler postDealy, assuming postDelay 10s first, then postDelay 1s, how
These frequently asked interview questions. If you were an interviewer, how would you answer and how much could you answer?
(Answers to the above interview questions: waiting for you at the end of the article)
Bonus benefits
Through the collection and analysis of the face-to-face interviews of these major manufacturers in the past two years, here is a targeted PDF of the knowledge points frequently asked in Android interviews, which can be obtained at the end of the article if needed.
Chapter 1 Java Basics
- Comparison of static inner class and non-static inner class
- Understanding and Application of Polymorphism
- Polymorphism understanding of java methods
- The difference between interface and inheritance in java
- The benefits of thread pool, detailed explanation, single case (absolutely easy to remember)
- The advantages and principles of thread pool
- Advantages of thread pool (emphasis)
- Why is it not recommended to create thread pools directly through Executors
- BlockingQueue and its implementation are not afraid of difficulties
- In-depth understanding of ReentrantLock and Condition
- Java multithreading: Lock for inter-thread communication
- Synchronized keyword principle
- Principle of ReentrantLock
- Hash conflict resolution and expansion mechanism in HashMap
- JVM common interview questions
- JVM memory structure
Chapter 2 Android Basics
- Activity knowledge points (required)
- Fragment knowledge points
- Service Knowledge Points
- Intent knowledge points
Chapter 3 UI Controls
- screen adaptation
- Main control optimization
- Event dispatch and nested scrolling
Chapter 4 Network Communication
- Network protocol
Chapter 5 Architecture Design
- MVP architecture design
- Component Architecture
Chapter 6 Performance Optimization
- start optimization
- memory optimization
- drawing optimization
- Installation package optimization
Chapter 7 Source Code Process
- Open source library source code analysis
- Glide source code analysis
- Android interview questions: Glide
- day 20 interview questions: Glide interview questions
- Talk about those things about Glide in the interview
- Interviewer: If you write Glide on your resume, please pay attention to the following points...
- Summary of solutions to Glide OOM problems
- OkHttp source code analysis
- Okhttp connection pool reuse mechanism
- Implementation of Okhttp flow and optimization
- An analysis of okhttp for your benefit
- OkHttp interview - the entire asynchronous request flow of OkHttp
- OkHttp Interview – Detailed Explanation of the sendRequest Method in HttpEngine
- OkHttp analysis summary
- Working principle of Okhttp task queue
- Android high-frequency interview topic-architecture (2) okhttp interview must know
- Android network optimization, using HTTPDNS to optimize DNS, from principle to OkHttp integration
- Retrofit source code analysis
- RxJava source code analysis
- RxJava principle and source code analysis
In 2023, the latest Android interview major manufacturers must take 174 questions (with detailed answers)
Due to the large content of the article and the limited space, the information has been organized into a PDF document. If you need the complete document of "174 Questions Required for Android Interviewing Manufacturers", you can add WeChat to get it for free!
" 174 questions that Android interview manufacturers must take "
outline
1. SD card
2. Android data storage method
3. BroadcastReceiver
4. What are the consequences of frequent sp operations? How much data can sp store?
5. The difference between dvm and jvm
6. ART
7. Activity life cycle
8. Can the Application start the Activity?
9. What are the states of the Activity?
10. What are the life cycle of the Activity when switching between horizontal and vertical screens? What are the states of the Activity?
11. How to set the activity into a window style
12. How to start the Activity
13. Service life cycle
14. IntentService
15. Fragment and Activity onCreateOptionsMenu
16. Service's onStartCommand has several return values
17. Under what circumstances does Service's onRebind execute?
18. Handler prevents memory leaks
19. Matching rules of IntentFilter
20. Fragment and Activity pass value
21. Fragment life cycle
