Job-changing technical interview lecture by a developer who has been interviewed more than 20 times

Learn server scaling and large-scale data processing strategies for technical interviews, and how to best answer open-ended questions encountered in final interviews, through Q&A.

Based on my experience as an interviewer and 14 years in charge of recruitment, having helped over 3000 people pass, I will provide detailed know-how for passing interviews from an interviewer's perspective.

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 guide. Beyond basic syntax, we explain 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.

Database concepts most frequently encountered in interviews and practical work, This introductory course is organized flow- and diagram-centrically. From SQL basic syntax to normalization, transactions, indexes, sharding/partitioning, and security, It explains seemingly complex DB concepts, structurally linking them with real-world examples. Finally, an interview practice chapter is included, So you can confidently answer questions like "What is a transaction?" and "When are indexes used?".

This is a [Backend, Resume Enhancement] class prepared for job seekers and junior developers.

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

Through this lecture, students will be able to learn the basic and post-processing technology flow of semiconductors, and will be able to learn the content necessary to prepare for interviews at post-processing semiconductor companies.

This is a core CS (computer-science) lecture that selects only the computer architecture concepts frequently encountered in practice and interviews, explaining and organizing them easily with a focus on diagrams. It was designed so that even those encountering it for the first time can grasp the flow and quickly continue with subsequent learning. The slides themselves are structured to serve as reviewable summary notes. If you want to get a grasp of the computer architecture flow, start right now.

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.

We'll tell you what to do and what not to do when you have to give a technical/business presentation.