TCL Shenzhen Advanced Android

  1. The architecture of the project, the roles of the various sides. Because of the preparation, this piece is not finished
  2. Communication mode adopted by each end: HTTP or MQTT. The answer is MQTT.
  3. Understand the MQTT protocol? What is the linking process like?
  4. MQTT cannot receive packets. How do I resolve the problem? Have you used any other tools to capture a bag
  5. Is the MQTT communication protocol self-defined?
  6. Dictating the socket connection process
  7. Socket through TCP communication, half packet, sticky packet? Half a pack, sticky bag say
  8. Socket TCP bytes data. How to ensure the normal format of data on the receiving end
  9. Does TCP fail to receive data? Even if the network is bad, weak network
  10. TCP three handshakes, four handshakes back
  11. Udp application scenarios
  12. Is udp socket communication used before
  13. Udp broadcast scenarios
  14. Udp multicast and multicast, unicast are different from each other
  15. Differences between UDP and TCP
  16. Do you know the DLNA screen projection protocol? Which modules are needed at work? What’s the process?
  17. How the client feeds the recorded audio to the server in real time.
  18. Is the foreground process understood? How do I start a foreground process? If the service is set to sticky, will the service restart if it is killed?
  19. What about gc garbage collector? Is it useful at work? What about memory management? Which objects will be reclaimed? What are the problems with GC?
  20. Do you understand NDK? How do I call so? Did you write Cmake? Talk about the steps for the Java layer to call so
  21. Let’s talk about the Android startup mode. Singtop, SingTask, SingInstance
  22. ActivityA——->ActivityB(the startup mode is Singinstance and A and B are different processes), kill ActivityA. If you press on interface B to return to interface A, will interface A restart? What’s the reason?
  23. Do you know about multithreading? Socket, which has a read stream and a write stream. Read and take. In the case of multi-threading, how to ensure the security of reading, how to design an efficient architecture. The consumption/generation mode is formed by a Queue.

24. Performance optimization knowledge, tell me the process of solving the most difficult performance problem? 25. Linux epoll, select the difference

That’s all I can remember. Algorithms, OKHTTP, and so on are not asked how the framework works