Recently, a friend went to Alibaba for an interview, but the interview failed, and he shared an algorithm interview question he was not good at. The topic is this.
Problem: Given a binary search tree (BST), find the Kth smallest node in the tree.
Subject: Alibaba Expert: Wenjing/Alibaba Cloud CDN Senior Technical Expert
Reference answer:
- Inspection point
- Understanding of basic data structure and coding ability
- Recursive use
Don't change career easily
There are two kinds of career changes that I think are normal. One is that the industry disappears or declines, and individuals cannot display their talents. The other is that the interest is not in the bank, so turn to one that you are interested in. And now most of the changes are purely to follow suit, for the money, and ignore long-term development.
Changing careers is equivalent to going back to the original point and starting anew. In terms of image, it is just to change a different brick and then move the brick (except for high-tech ones). Therefore, we should pursue qualitative change rather than parallel or retrogression. One retrogression can be tolerated, and it is difficult for us to enter the ascendant period after 35 years of retrogression.
And this industry has neither disappeared nor declined, as long as it currently exists, it has its prospects. An industry does not collapse overnight. Android is the world's largest terminal occupancy, and the Android ecosystem will not easily let Android fall. At least in the lifetime of our generation, Android will not die.
How to improve competitiveness
1. Choose a segment
Android is now subdivided into many fields. The aforementioned are application development, reverse security, audio and video, Internet of Vehicles, Internet of Things, mobile phone development, SDK development, and smart TV box development. Choose one of these fields and continue Go deep.
2. Do subtraction, try to specialize in one technique
In today's society, the division of technology is becoming more and more detailed, and the more detailed it means that most companies (except small workshops) need specialized talents (preferably proficient in multiple disciplines). You will find that most of the technical people around you rely on one technique, but you rarely see a bunch of techniques that are not proficient. For example, in the world of martial arts, the master showdowns all took out the martial arts at the same time. If the martial arts were not good at home, and they were abused every minute, the saved martial arts would not need to be used for ugliness. I think the real version is to go to a big company to interview Android. As a result, I don't know the Android technology deeply, and I am abused by all kinds of things. The interviewer is not interested in learning about the remaining front-end technology, back-end technology, and python.
So it’s not that the more skills you know, the better, you must do a good job of subtraction, first specialize in one subject, and then learn other techniques.
3. Talk about the hot technology of Android recently
Kotlin is the official development language recommended by Google. It is interoperable with Java, interchangeable, simple and safe, etc. It is a statically typed programming language that runs on the Java virtual machine. It is called the Swift of the Android world and is designed and developed by JetBrains. And open source. Kotlin can be compiled into Java bytecode or JavaScript, which is convenient to run on devices without JVM.
Flutter, Flutter is a new mobile UI framework released by Google at the 2018 Mobile World Congress on February 27, 2018 to help developers develop high-quality native applications on both ios and Android platforms. Since it was released by Google, it is worthy of recognition in terms of prospects.
Both of these techniques are recommended for everyone to learn, but don't expect them to increase your competitiveness. Li Si can learn it in one week, and Zhang San can also.
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I also summarized most of the interview questions and answers involved in the Internet company Android programmer interviews, and compiled documents, as well as the system's advanced learning video materials, and shared them for free.
(Including the application of Java in Android development, APP framework knowledge system, advanced UI, all-round performance tuning, NDK development, audio and video technology, artificial intelligence technology, cross-platform technology and other technical materials), I hope to help you before the interview Reviewing and finding a good job will also save everyone time to search for information on the Internet to learn.
How to get it: follow + like + click on my GitHub to get it for free !
AF%95%E6%8B%BF%E9%AB%98%E8%96%AA%EF%BC%81.md)！**
