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Software Engineering

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From frontend, backend to system design, a complete collection of the most common interview questions

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Software engineering learning resources and classic software engineering book summaries

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Latest Articles

Reducing Latency Through Colocation

Colocation reduces internode and intranode communication latency by moving users, servers, databases, and computing resources physically closer together. This article uses edge computing, CDNs, CPU caches, and the tradeoffs between TCP and UDP to explain how colocation improves system latency in practice.

What Are Docker and Containers? Why Do We Need Them, and How Do You Get Started?

This article introduces the basics of Docker and containers, explaining how containers let applications run in consistent, isolated environments and how they differ from virtual machines. It also walks through hello-world and Node.js examples to clarify the relationship between the Docker CLI, Docker daemon, images, and containers.

How to Diagnose Problems and Fix Errors During Incidents?

This article explains how engineering teams can diagnose problems and fix errors in a structured way during incidents. It summarizes the effective troubleshooting approach from Google's SRE book, including triage and examination, diagnosis, hypothesis testing, and the principle of stopping the bleeding before digging into root cause.

Feature Articles

[Medium] LeetCode JS 30 - 2625. Flatten Deeply Nested Array

Learn how to flatten deeply nested arrays in JavaScript without using the built-in Array.flat method. This tutorial introduces a recursive approach to flattening multi-dimensional arrays to a specified depth. Enhance your JavaScript skills with this comprehensive guide!

How to remove duplicates from an array?

Learn multiple solutions to remove duplicates from an array efficiently in JavaScript. This tutorial covers four methods: using Set, filter with indexOf, nested for loop, and utilizing Object or Map. Enhance your JavaScript skills and be well-prepared for array manipulation challenges in interviews and real-world scenarios.

The Most Common JavaScript Event Loop Interview Questions

The event loop is a common question in interviews. In addition to knowing the concept, You also need to know how it works in code. Here we have listed common JavaScript event loop code interpretation questions

What is the CSS Box Model?

When the browser engine lays out the document, it will treat each element as a rectangular Box according to the Box Model of CSS. This Box is composed of content, padding, border and margin.