Essential Computer Science Knowledge for Job Preparation

Bestseller 『Study Computer Architecture + Operating Systems on Your Own』 author's free lecture. A collection of computer architecture and operating systems books that developers must know.

Free lecture by the author of the best-selling book, “Network Study Alone.” A summary of a network textbook that developers must know.

Version control is now essential knowledge for developers. Let's learn Git and Github step by step, starting with basic git commands and signing up for Github :)

This is a lecture on the book [Everyone's Git & GitHub] published by Gilbut Publishing. It contains only the essentials of version control using Git and GitHub. You will learn how to use Git, which can be considered a developer's essential knowledge, without commands and how to use GitHub proficiently.

A beginner's guide to SQL coding! We'll teach you the secrets of writing, interpreting, and validating SQL.

Learn how to analyze 5 million Korean apartment transaction data using PostgreSQL. Covers the process of data cleaning, transformation, and deriving meaningful insights through various SQL queries.

From HTTP basics to data requests, real-time communication, security, and performance optimization, learn the network knowledge web developers must know.

You can build a database, create tables, and manipulate or change data within the database using various SQL queries.

You can master Database development, which is essential for mobile/web development, through MySQL.

CS knowledge lectures on design patterns, networks, operating systems, databases, etc. from the author of the #1 book in Korea, "CS Major Knowledge Notes for Interviews"! Covers all the concepts needed for CS interviews and the latest past questions!

This course covers the latest data structures and algorithms used in representative open sources such as Linux.

A course where you can understand core data structure concepts and train to explain them verbally for interviews.

Learn how to write SQL queries and work with databases using the MariaDB client development tool HeidiSQL.

This course focuses on building the real skills needed in actual development work. The goal is not simply to learn how to write code well, but to experience how to work well as a developer. The examples are based on the commerce domain, covering cases frequently encountered in real-world work environments, and are provided in SpringBoot & Kotlin. However, it's a course where anyone can contemplate and experience real-world development through thought-provoking content, without being dependent on any specific language or framework. Based on the practical perspective of a senior developer and former director at Toss Payments who led a large-scale payment service organization, the course is designed to help you learn the thought processes and design decisions used in actual work environments.

[Only for those new to web development] Spring Boot REST API: Building step-by-step while properly understanding JPA

This is a course for learning MS-SQL through baseball and corporate databases.

Practical Payment System Development Course, learn by code, and cover the knowledge needed to implement a real system.

Channel Talk interviewers will directly analyze the difference between failing and passing answers to the same questions, and help you prepare for actual follow-up questions.

This course provides a step-by-step learning path, ranging from the fundamental usage of MySQL to advanced techniques required in real-world production environments. It covers a wide range of topics, including data modeling techniques based on various case studies and practical data, evaluating the effectiveness of Foreign Key designs, analyzing Google Calendar schema DDL, and modern DDL design principles. Through this course, you will gain an in-depth understanding of how to utilize MySQL as a core system component rather than just a simple database.

I want to launch a side project as a real service and study Kubernetes, but managed services from AWS/GCP (EKS, GKE, etc.) are too expensive. On the other hand, running it only on a local computer makes it difficult to experience network configurations or actual deployment environments. We will utilize the "Always Free" tier of Oracle Cloud (OCI), which offers the most powerful free benefits among existing public clouds. By installing the lightweight yet powerful k3s, we will build a Linux server and Kubernetes environment capable of hosting actual services from scratch—all at zero cost. After taking this course, you will gain a general understanding of cloud networking and possess your own Kubernetes cluster infrastructure where you can deploy and operate your applications for free.

Analysis of CS major interview questions [Operating system/data structure/algorithm/database/network]!

I have summarized the essential SQL SELECT statements and basic usage of Google Sheets that I learned while working as an analyst at a service company.

✅ Out of the entire series (1) ~ (7), (4) data structure, algorithm, object-oriented, programming language ✅ CS101 series lectures - From basic computer theory to the latest practical examples - Provides a wide range of basic knowledge

By implementing various practical data analysis cases using SQL, you can simultaneously improve your data analysis and SQL utilization skills.