Preface

This Android interview question covers pictures, network and security mechanisms, network, database, plug-in, modularization, componentization, hot fix, incremental update, Gradle, architecture design and design pattern, Android Framework, Android excellent tripartite library source code Wait. Suitable for intermediate and senior engineers.

Is embedded development difficult?

After this exchange with my classmates, I also learned a lot myself. Because I don't understand a lot of embedded aspects, I can count on learning.

From my personal point of view, combined with previous learning experience. I think embedded development is Javastill more difficult than soft opening on the Internet (such as the back-end). For example, we do Javadevelopment. No matter how you say it, it is basically user-mode things, but many embedded things have penetrated into the kernel mode . So there must be some difficulty, which can be manifested in several aspects:

First of all , the embedded system is at the bottom level, and both software and hardware must be understood, and the requirements for capabilities are much higher;
Secondly , the learning threshold of embedded development is also higher, and like Linuxthe development process under the platform, many people are not used to it and can't figure it out;
In addition , the positive feedback of embedded learning may be slow, especially in the early learning stage, which leads to a lack of sense of accomplishment and can't stick to it, so it is often abandoned.

But having said that, this is what IT does. The more you go to the bottom, the higher the training of human ability, so for ability, it is upgrading , so on the contrary, if the embedded system is done well, I think it will be the Internet problem. Not too big, it will be a dimensionality reduction blow when the time comes .

Overall learning ideas

Generally speaking, embedded learning can be divided into three major stages:

First, the basic learning stage , which includes general programming foundation (C language, data structure/algorithm, operating system, computing network, computing group, Linux system foundation) and basic hardware foundation . A solid grasp of these two foundations is the follow-up The source of power for development and continuous progress.

The second is the embedded application programming stage , or system platform programming stage. Because I generally rely on a specific embedded platform and a specific embedded operating system, I am familiar with the programming methods and processes on this system platform. Take a common ARM+Linuxplatform as an example, you need to master several major aspects from memory management to multi-task programming, file I/O, network programming, and even graphical interface programming.

The last step is to go deep into the underlying embedded development stage . The most common ones are kernel development and driver development. These all belong to the category of kernel development, so you need to learn and understand the internal mechanism of the operating system. On this basis, you need to master the migration from system to The details of kernel development and driver development are the road to godhood.

The general idea is this, let’s take a look at the detailed study route and knowledge points.

Learning route + knowledge combing

It took a long time to sort out this detailed brain map of the knowledge route. Of course, due to limited time and limited capabilities, after all, the entire embedded system is too large. Including my embedded classmates, it is impossible to understand everything. Some things may not be covered, and the shortcomings are still small. Partners communicate and supplement together, improve and progress together.

Recommended books

Finally, according to the overall learning route, we recommend some corresponding classic books:

At last

Finally, here is the information I reviewed during this period. This information was also shared by a friend by accident. It contains the analysis of the real interview questions of Tencent, ByteDance, Ali, and Baidu in 2020-2021, and organizes each technical point. Become a video and PDF (knowledge context + many details).

There are also advanced architecture technology advanced mind maps and advanced advanced architecture materials to help you learn and advance. Here I also share it with you for free and save you time searching for information on the Internet to learn, or you can share it with friends around you to learn together.

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Let's encourage each other~

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