Preface
What knowledge do Android senior architects need to learn?
Here is a summary of the skills that I think need to be mastered as a senior developer .
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 summarized and made an advanced learning roadmap Share with everyone, there is a free way at the end of the article!
java aspect
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Basic knowledge points The difference between collection classes and applicable scenarios 1 The difference between static internal classes and non-static internal classes in java memory allocation and creation process memory leak problem? How to ensure thread safety? Many times ( must be asked in the interview ) Which types of locking methods (it is better to involve monitor) Optimistic locking and pessimistic locking (applicable scenarios) The concept of applicable scenarios of locks The concept of thread pool constitutes applicable scenarios Why use thread pools (involving thread allocation) The process of resources, and the difference between the process of allocating resources)
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Kernel aspect ( must ask in interview ) GC garbage collection mechanism How does n-time GC find objects to be cleared? Java's four references and applicable scenarios What algorithm is used for GC core cleanup? New generation copy cleaning, old generation mark arranging expansion: How to effectively defragment memory in old generation mark arranging? Java memory structure How is the memory of n java distributed? The loading mechanism of java classes The loading mechanism of java objects The generation of constant pool string objects The caching mechanism of Integer
computer network
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Network hierarchy and corresponding protocols
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TCP TCP three-way handshake (what happens if no response is received for the first and third time?) TCP waved four times. Congestion control has not been tested?
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HTTP HTTP message, the difference between HTTP versions, https
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IP Why not use mac as ip address ping implementation principle ttl survival field
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ARP description process, broadcast unicast
operating system
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The difference between thread and process (what is the resource allocation)
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Process communication
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Memory space allocation
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Deadlock The conditions of the deadlock (detailed example) Ways to avoid deadlock
Design Patterns
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Generally speaking, you know which modes you know, and you must explain the applicable scenarios
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Singleton mode, lazy man, hungry man, thread safety, double lock
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Observer mode
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Adapter mode
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Appearance mode
android aspect (generally asked according to the project)
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android process communication
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service
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handlerThread
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Handler operation mechanism 1 time
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recyclerView caching mechanism 1 time
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view redraw
Project aspect
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Interaction between fragment and activity
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What is the safety of using webview? And js call each other
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How to ensure that there is no conflict when reading and writing files in the process of resumed transfer description
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Asynctask memory leak, why is the leak solution and what is the debugging tool?
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MFCC process recording session (Quick hands asked a lot of details and asked to write pseudo code)
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MVP
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The difference between recyclerView and listview caching mechanism will memory leak if too many items
Due to space reasons, this interview book has been compiled into a PDF document. If you need a complete set of the Android interview book, please like it + click on GitHub to get the information for free!
This article is included in the open source project: GitHub , which contains self-learning programming routes in different directions, interview question collections/face sutras, and a series of technical articles, etc. The resources are continuously being updated...
95%E6%8B%BF%E9%AB%98%E8%96%AA%EF%BC%81.md), which contains self-learning programming routes in different directions, interview question collections/faces, and series of technical articles, etc. , Resources are being continuously updated...