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Recently, I am applying for a backend developer summer internship and I have been asked a few questions were quite interesting. This post is a collection of backend interview questions which I have encountered. Hope it can help you when you are finding yourself in the same situation 🌟. Since I am applying positions based in China, I will discuss the questions both in Chinese and English.

最近，我正在寻找后端开发的暑期实习，被问了一些有趣的问题。这篇博客是我遇到的问题的汇总，希望能帮助到需要的人。因为我寻找的是大陆的岗位，所以在本文中会同时使用英文和中文。📚

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In neural networks, there exist several free parameters: learning rate, batch size, number of layers, number of neurons, etc. We are faced with the problem of selecting the best model for a given regression or classification problem. There are various ways to do so. We can either select the best model with the best parameter value. This post is a lecture notes of the SC4001 course at NTU, covering model selection and overfitting.

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In our team, March Studio, we developed a scheduling module that requires concurrency capabilities. Initially, we built this module using Python with the Flask library, but we encountered performance issues. As a result, we decided to create a simple web server using Golang. This module is still under development. This article documents my experience building a web server with Golang, and I hope it can be helpful to others.

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Deep Neural Networks (DNNs) are artificial neural networks with many hidden layers. They transform inputs through these layers to learn complex features from data. DNNs excel in tasks like image and speech recognition, and natural language processing. Their success comes from learning from large datasets and using backpropagation to reduce errors. With more computing power and data, DNNs have become essential in deep learning. This post summarizes the SC4001 course at NTU, offering an overview of DNNs based on course notes and my insights.

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Greedy algorithms make the locally optimal choice on each iteration with the hope of finding a global optimum solution. They are typically used to solve optimization problems, and are usually more efficient than other algorithms. This post provides a comprehensive review of the algorithms covered in Lecture 6 of the SC2001 course in NTU, including Djikstra’s algorithm and Prim’s algorithm.

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