[CS Technical Interview 2] Operating Systems That Click

How does the internet work, and how do browsers fetch web pages? This is a core CS (computer science) lecture that organizes network concepts following the OSI 7-layer flow so you can explain this question yourself. It's structured with diagrams and flow-centered explanations to help you intuitively understand the structure, and connects concepts like the transport layer (TCP/UDP), IP addresses, NAT, and HTTPS that frequently appear in technical interviews to actual questions.

This is a core CS (computer science) course that organizes essential data structure concepts required in both practical work and interviews, centered on intuitive flow and diagrams. It covers the full range from arrays and lists to trees, graphs, and heaps, carefully selecting only the core concepts. Rather than simple enumeration, it's designed with a connected structure so that even beginners can quickly understand the overall context. The slides are organized in a study note format suitable for review, and are especially recommended for those who want a final check before interviews or to solidify their foundational concepts.

This is an introductory course that organizes the most frequently appearing database concepts in interviews and practical work with a flow-centered + diagram-centered approach. From basic SQL syntax to normalization, transactions, indexes, sharding/partitioning, and security, it structurally connects and explains complex DB concepts with real examples. At the end, an interview practice chapter is included, so you can confidently answer questions like "What is a transaction?" and "When do you use indexes?"

This course carefully selects only the essential JavaScript core concepts you must know for practical work and interviews, covering everything from scope and execution context to closures, prototypes, asynchronous processing, and module systems all in one comprehensive guide. Going beyond superficial syntax explanations, it's structured to help you understand how JavaScript actually works from fundamental principles. Through examples and visual materials, even concepts that seemed difficult are explained easily, aiming for 'understanding that can be expressed in words' that you can directly utilize in interviews. If you want to systematically organize JavaScript's operating principles, start right now.

This course carefully selects only the essential Java core concepts you must know for practical work and interviews, covering everything from object-oriented programming to collections, multithreading, and modern Java all in one comprehensive package. Going beyond basic syntax, it explains advanced concepts that make the difference in interviews through diagrams and examples in an easy-to-understand way, organized with slides for quick review at a glance. If you want to systematically organize Java core concepts, start right now.

This is a core CS (computer-science) course that selects only the computer architecture concepts frequently encountered in practical work and interviews, explaining and organizing them in an easy-to-understand way with a focus on diagrams. It's designed so that even beginners can grasp the flow and quickly continue their subsequent learning. The slides themselves are structured to serve as reviewable summary notes. If you want to organize the flow of computer architecture, start right now.

How does the internet work, and how do browsers fetch web pages? This is a core CS (computer science) lecture that organizes network concepts following the OSI 7-layer flow so you can explain this question yourself. It's structured with diagrams and flow-centered explanations to help you intuitively understand the structure, and connects concepts like the transport layer (TCP/UDP), IP addresses, NAT, and HTTPS that frequently appear in technical interviews to actual questions.

This course covers the fundamental concepts of operating systems, one of the core subjects in computer science. Operating systems are essential software for efficient resource management and providing user environments in computer systems, and through this course, learners can systematically understand how operating systems work and what components they consist of. Additionally, by learning the structures and functions of various operating systems, students will master the detailed operating principles of operating systems such as processes, memory management, file systems, and disk management, and can solidly build the foundational knowledge necessary for actual development and system utilization. Through this course, learners will gain a comprehensive understanding of operating systems and will be able to have confidence in advanced computer science learning and practical applications.

This is a core CS (computer science) course that organizes essential data structure concepts required in both practical work and interviews, centered on intuitive flow and diagrams. It covers the full range from arrays and lists to trees, graphs, and heaps, carefully selecting only the core concepts. Rather than simple enumeration, it's designed with a connected structure so that even beginners can quickly understand the overall context. The slides are organized in a study note format suitable for review, and are especially recommended for those who want a final check before interviews or to solidify their foundational concepts.

This is a course provided to those who have completed the course 'Learn broadly and superficially to become a computer science major' so that they can study the operating system in more depth.

The era of 60 million won starting salary for game programmers! For those who are confused about what to study and how to study, We have prepared a vivid story about the game industry and the hiring process.

This lecture teaches the essential OS principles for all developers.

This course carefully selects only the essential JavaScript core concepts you must know for practical work and interviews, covering everything from scope and execution context to closures, prototypes, asynchronous processing, and module systems all in one comprehensive guide. Going beyond superficial syntax explanations, it's structured to help you understand how JavaScript actually works from fundamental principles. Through examples and visual materials, even concepts that seemed difficult are explained easily, aiming for 'understanding that can be expressed in words' that you can directly utilize in interviews. If you want to systematically organize JavaScript's operating principles, start right now.

This course carefully selects only the essential Java core concepts you must know for practical work and interviews, covering everything from object-oriented programming to collections, multithreading, and modern Java all in one comprehensive package. Going beyond basic syntax, it explains advanced concepts that make the difference in interviews through diagrams and examples in an easy-to-understand way, organized with slides for quick review at a glance. If you want to systematically organize Java core concepts, start right now.

Learn the essential process of building Observability in a microservices architecture (MSA) environment from basics to practical implementation. Through step-by-step hands-on practice, you'll master standardized data collection using OpenTelemetry, trace storage and search with Grafana Tempo, and visualization using TraceQL. You can learn the process of tracking service flows through distributed tracing, identifying bottlenecks, and analyzing the root causes of failures.

✅ Out of the entire series (1) ~ (7), (5) operating system, user interface, database ✅ CS101 series lectures - From basic computer theory to the latest practical examples - Provides a wide range of basic knowledge

This is an introductory course that organizes the most frequently appearing database concepts in interviews and practical work with a flow-centered + diagram-centered approach. From basic SQL syntax to normalization, transactions, indexes, sharding/partitioning, and security, it structurally connects and explains complex DB concepts with real examples. At the end, an interview practice chapter is included, so you can confidently answer questions like "What is a transaction?" and "When do you use indexes?"

Artificial Intelligence, AI, agents... They might seem grand, but once you try them, they're not as difficult as you think. That's why it's important to implement simple features yourself. Through practical projects that can actually be used at a company, you'll directly experience various use cases and learn how to utilize and apply AI agents.

You need to have a solid understanding of the basic principles of operating systems to understand advanced programming techniques. This lecture is a specialist-level lecture on the dinosaur book, which can be called the bible of operating systems.

I have been working in the IT field for 20 years in development and construction. I would like to be a good guide for those who are entering or starting out in the development field.

This is a core CS (computer-science) course that selects only the computer architecture concepts frequently encountered in practical work and interviews, explaining and organizing them in an easy-to-understand way with a focus on diagrams. It's designed so that even beginners can grasp the flow and quickly continue their subsequent learning. The slides themselves are structured to serve as reviewable summary notes. If you want to organize the flow of computer architecture, start right now.

Learn essential Windows System programming techniques for developing games and applications for Windows.

For everyone starting work in PO or PM positions from existing roles such as design, non-development majors, product planners, etc., we share fundamental know-how.

When resumes look similar, 'differentiation' secures acceptance. For 6 weeks, learn 4 practical resume strategies directly from a backend practitioner.

DevOps Interview Preparation: Master your interview preparation for Git, Docker, CI/CD, Terraform, Ansible, Kubernetes, and Monitoring.

A C++ course optimized for employment that prepares you for both practical work and interviews simultaneously. An AAA game developer helps ensure your employment with interview questions from major domestic game companies and practical cases collected over 10 years.