Solve 480 past exam questions from 2015–2026 for the two major subjects of the national 9th-grade computer administration exam (General Computer Science and Information Security) through 20-minute CBTs for each subject. The questions and final answers are exactly as released by the Ministry of Personnel Management. Upon submission, your score and whether you failed a subject immediately appear, and every question includes an explanation.

The real challenge of the Computer Skills Level 2 written exam is seeing the test format for the first time at the actual test center, since past questions are not publicly available. Solve five 40-question, 40-minute CBT mock exams (200 questions total) newly created to match the current 2024–2026 testing standards, just like the real exam. Use the automatic scoring and accuracy rates by section to identify weak areas, then improve them with explanations for each question. This is a mock-exam practice workbook, not a video lecture course.

Solve past questions from the 1st and 2nd rounds of the Licensed Real Estate Agent exam according to the actual time allotted for each session (100 minutes, 100 minutes, and 50 minutes). The questions are reproduced exactly as they appeared in the exam papers, from the 24th exam in 2013 through the 36th exam in 2025. Once you submit, your score for each subject and whether you failed any subject is shown immediately, and you can retry only the questions you got wrong.

This is a hands-on course where you'll build an AI-based autonomous driving car using Raspberry Pi and various sensors.

A CBT that lets you solve 2,220 past questions from the 23rd (2014) through the 35th (2026) Certified Labor Attorney First Exams under the actual test-time conditions. Includes subject-by-subject pass/fail and average-score assessments, explanations with statutory and case-law grounds, and highlights of legislative amendments made after each exam.

Learn the fundamentals of Onshape and learn the basics of 3D modeling and CAD.

This course teaches you how to write safe and reliable code in the software development process. Rather than simply stopping at feature implementation, you'll learn programming principles and techniques that can prevent security vulnerabilities and ensure stability. Through hands-on practice and case studies, you can understand security threats that may occur in real development environments and acquire safe coding techniques such as coding rules, input validation, exception handling, and memory management to prevent them. By taking this course, developers will enhance the completeness of their code while gaining practical capabilities to develop software with security and reliability.

Learn the basics of V-Ray for SketchUp users and gain 3D rendering visualization skills for your design work.

Learn the basic functions for performing 3D CAD work using AutoCAD.

We're starting a series of tutorials for Photoshop image correction and editing, from basics to advanced editing.

This is a basic machine learning course that briefly covers the basic machine learning theory for those who are new to machine learning.

This is an assembler course provided by Smoothie TV.

This is a free Unity basics course by Unity Hub root owner Dong-geun Joo.

This is an Arduino lecture by Park Sung-jun on YouTube.

I help ordinary people who know nothing to create a homepage by just following my instructions!

This is a series of video lectures for AWS beginners and college students enrolled in AWS Educate. We will briefly introduce the AWS registration process and free tier services.

We introduce good lectures based on the motto of TED(http://ted.com) ‘Ideas worth telling’.

You can start creating games without difficult programming with Unreal Engine 4's Blueprint.

I would like to introduce you to the Premier course by Nori Island on YouTube.

This course covers how to automate meeting minutes using Naver Clova Note. You will learn the basic concepts of AI and how to use the Clova Note platform. Through hands-on examples that can be applied immediately at work and in everyday life, you will develop the skills to use an AI assistant.