Things to know before an interview - New Java backend developer

From TCP/IP to HTTP! This lecture is for those who lack basic network theory and want to understand major theories by memorizing them. You can do it!

Are you lost while learning web development? I'll help you find your own way. Even if you're not from a computer science background, you can understand how web service architecture works through a short 1-hour lecture.

This course is for those who want to develop packet analysis programs like Wireshark and various network solutions using the Npcap library.

This lecture guides those who have learned the basic course of network core theory by memorizing it to understand theories in more depth. It covers more in-depth theories such as NAT technology, the operating principle of Internet routers, load distribution system principles, and VPN technology principles. The goal of this lecture is also to finish it by memorizing it! You can do it!

This is a lecture for all non-major beginners who want to become computer science majors by memorizing broadly and shallowly. You can quickly learn what you can learn in essential computer science major subjects such as computer architecture and operating systems. Above all, you can finish it by memorizing it!

This is a C language programming course for those who want to become professional developers rather than hobbyists. I recommend it to those who want to learn by writing and reading and go down a sweet path!

This course covers topics for those who have completed basic studies of the C language, such as compiler theory, stack frame structure, multi-threading, virtual memory structure, security vulnerabilities, and secure coding. It is highly recommended for those who wish to become experts in the C/C++ field, or those who majored in CS or have similar skills!

This lecture covers how to properly implement a linked list-based linear data structure using C language. You can understand the structure of the DB as well as the linked list at once.

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.

We enable you to fundamentally understand and resolve issues where Hangeul appears broken on web pages or in databases, or files contain unknown characters.

We will help you memorize and finish the encryption technology responsible for the security of the Internet very easily. You can understand the structure and principles of various technologies such as SSL certificates, PKI technology, digital signatures, and public authentication systems.

It covers just two things properly: object-oriented programming and the JVM! Plus, it throws in linked-list-based linear data structures.

If you have studied the C language thoroughly and studied linear data structures, it is now time to experience the world of object-oriented programming with C++!

Starting with java.io, you can learn how to develop high-performance input/output systems based on NIO and NIO.2. Most importantly, the moment you master file I/O, we'll enable you to master high-performance server development as a bonus!

In this lecture, you will learn application-level protocol design techniques and how to develop a high-performance server based on IOCP!

Based on an understanding of Reflection and Annotations, it helps you clearly understand how the Spring framework operates!

For those aspiring to be Java-based Spring backend developers, to easily secure a job, we learn Java properly! Rigorously!

Anyone who is a C/C++ developer can get started. You can quickly learn MFC Windows programming by selecting only the core. We also provide a 1200-page textbook.

Secrets to Escaping Beginner Status Revealed! We'll properly teach you about Java multithreaded programming and synchronization techniques!

You will acquire the skills to develop a security system by learning how to intercept the process in which a specific application calls various API functions. ※Absolutely no abuse!!!

The job market is also becoming increasingly polarized. Six out of ten new recruits are already mid-career recruits with 2-3 years of experience, and there are more and more companies that only conduct rolling recruitment without any open recruitment. Aren't you curious about realistic strategies to overcome the increasingly difficult employment gateway?

I will share all the trials, errors, and know-how I experienced on my journey from being a manufacturing web developer to becoming a back-end developer at a commerce/K company portal service company. Don't you all go through the same trials and errors!

For those who have chosen a career in information security/information technology and are preparing to move to large corporations/financial institutions, we will reveal our strategy for passing the exam. A current CISO who has personally recruited and recommended numerous people will share his secrets for passing the exam. He has heard from his acquaintances, security company CEOs and executives of large companies, and compiled a recruitment bible by collecting a vast amount of recruitment secret data.

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

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.

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.

Learn how to model data in a distributed database environment.

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

I've created the 'MySQL Performance Optimization Intro/Practical (SQL Tuning Edition)' course, easy for non-majors to understand and immediately applicable in practice!

You can learn about the core functions of MySQL and how to effectively use them in your work. You can also gain a new understanding of important parts that you have been using for a long time and have overlooked, and gain in-depth database knowledge.

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

Learn the easy and fun story of SQL Server operations from a Microsoft Certified Trainer! We explain core operational technologies that you can learn and use right away, and that are truly needed in the field, step by step so that even beginners can easily understand.

Master React rendering principles and optimization to apply them in real-world situations and prepare for interviews!

If you are preparing for a job change after 5 years or less, we will tell you all about career management methods along with successful cases of career branding that can increase your passing rate by more than 2 times with a strategy that differentiates you from others!

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

Learn common components of global-scale services through popular papers, books, and articles.

Learn C# for developing applications like ASP.NET, Winform, WPF, and MAUI that run on the .NET Platform.

This course covers the essential knowledge that every 0.5 to 3-year C# application developer should have.

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.