Key points in Tencent interviews and frequently asked technical points:
Data structure algorithm, tuning, View, SDK**, **animation audio and video, etc. and the framework you have used. The foundation of the first round is very important. After passing, the possibility of admission is relatively high!
The golden three and the silver four have arrived. Here I also share some free Java programmer interview topics and answers, and architecture video materials (collected at the end of the article). I hope that those in need can find a satisfactory one in the first wave of recruitment this year. Work smoothly!
The apps of first-line enterprises are multi-threaded and multi-process, while the Android inter-process communication mechanism is Binder, and the native inter-thread communication is Handler. Binder and Handler are a knowledge point that must be mastered to understand the Android operating mechanism, and it is a first-line Knowledge points must be asked in corporate interviews!
The following are the real interview questions that Dachang frequently asked about Binder:
- What are the advantages of Binder? (Byte beating)
- How does Binder make one copy? (Tencent)
- Explanation of the principle of MMAP; (Tencent)
- Why can't Intent deliver big data? (Ali)
- Describe the details of the java classes generated by AIDL; (byte beating)
- The communication mechanism at the bottom of the four major components; (byte beating)
- Why can't Intent deliver big data? (Ali)
- How does the Binder mechanism cross-process?
- Binder mechanism principle
In order to let everyone better grasp the principles of Framework and Binder, today I will share a summary of Android Framework high-frequency interview questions and BATJ Daniel's notes on Android Framework kernel analysis . After reading it, if you don’t believe you still don’t know Framework and Binder.
Android Framework high-frequency interview questions analysis
1. AMS 、PMS
- AMS overview
- AMS startup process
- AMS and process start
- AMS family
- PMS
2. Activity start process, App start process
- Activity start mode
- What is the Zygote process
- The startup process of the Zygote process
- SystemServer process startup process
- Start service
3. Binder mechanism (use of IPC, AIDL)
- What is AIDL and how to use it
- What is the full name of AIDL? How does it work? What types of data can be processed?
- Android's IPC communication method, what are the thread (inter-process) communication mechanisms
4. Why use Parcelable and what are the benefits?
- Implementation Mechanism
5. Android image display related process, Vsync signal, etc.
- Analysis of Android Vsync principle
- Double buffering
- Triple buffering
For more learning and discussion, welcome to join our knowledge planet!
There are many first-line technical experts in the group, as well as code farmers who are working in small factories or outsourcing companies. We are committed to creating an equal and high-quality Android communication circle. It may not be possible to make everyone’s technology advance by leaps and bounds in the short term. In the long run, vision, pattern, and long-term development direction are the most important.
, We are committed to creating an equal, high-quality Android communication circle, which may not be able to make everyone's technology advance by leaps and bounds in the short term, but in the long run, vision, pattern, and long-term development direction are the most important.
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