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The Basics of CS Knowledge | Design Patterns Network Operating System Database Data Structure

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!

(4.8) 253 reviews

3,996 learners

Level Basic

Course period Unlimited

  • kundol
Tech Interview
Tech Interview
Interview
Interview
Operating System
Operating System
Tech Interview
Tech Interview
Interview
Interview
Operating System
Operating System
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Reviews from Early Learners

Reviews from Early Learners

5.0

5.0

조현성

100% enrolled

1-line summary Big Stone is the best. If you have any complaints, ask. Kundol is the best because he/she is good at answering questions. Long review: I am a major, but I did not study as much as a non-major, so I bought it in July of last year, played around in my 4th year, graduated, and studied for 2 months from March to complete it. It is my 2nd month of job hunting. ㅠㅠ If you are a normal major, you probably have organized it yourself, so it is not necessary, but I think it would be good to buy the book, even if it is not a lecture, to organize it for an interview. 1. I did not learn design patterns in school, so it is really difficult. I think I should look at it again while doing a project. 2. At network school, I only learned theories, but this person has a Deep Dive part that gives examples of how theories are applied to practice, so I think it is good. 3. Operating system... It was really hell before, but even if you shorten it, it is difficult. I have to study hard. ㅎㅎ 4. Database is almost the same as what I learned in school. Of course, there is no SQL language or practice here, so it is different from school. 5. Data structure is enough to solve coding test problems, but I wonder how to solve it in an interview. I think it will be helpful for those who are wondering if it is good. 6. I can feel that they really care about the students since they were so kind even to the interview... I want to do my best for the interview in the second half. I am invincible. Big Rock is God!!!

5.0

korohi6561

19% enrolled

I was a major who knew some CS knowledge. It really helped me a lot in the actual interview. While looking at my major books, I could study deeply without knowing anything, but I think he explains really well based on some things that are deep, some things that are appropriately deep, and some things that are appropriately shallow. The lecture length is also 21 hours, 178 lectures, so I chose this because it was the longest, and I don't regret it. Thank you. However, if you fix the poor microphone quality, it would be a better lecture.

5.0

growingtree

100% enrolled

I felt the need to study the overall CS content, so I listened to it. Since I majored in big data, I didn't have the opportunity to study CS in depth like computer science students, but I felt the need to study CS while preparing for a job. I also got a lot of help from Bigdol's book, <CS Major Knowledge Notes for Interviews>, and since there was a lecture, I listened to it to study CS. Good points 1) It was hard to find a lecture or book that covered the overall CS content, but I liked that he summarized only the important content in a short period of time. 2) It may be a matter of preference, but Bigdol's lecture style suited me well, so it was good to listen to. It could be boring if he was too serious, but he also made funny jokes and was bright overall, which was good. 3) I liked that he recorded interview tips in the special lecture in the middle and in the last part. It's not easy to hear the know-how of someone who actually got a job at a large company, but I looked back on my job-seeking process and found things I needed to fix. 4) If you leave a question in the community, he gives you quick feedback, and the content of the lesson plan is also informative. It's so informative and there's a lot of content, but for me who lacks CS knowledge, I'm grateful for anything. Disappointing points 1) The content of the lecture notes and the lecture ppt are often different. The lecture notes are usually a summarized version and the lecture ppt is explained in lines, so there are parts where you have to add content yourself. 2) As mentioned in other course reviews, there are parts where the lecture is not smooth. The lecture is edited a bit in the middle and sometimes it stops in the middle. If you find this annoying, it might really bother you. I enjoyed it I liked the lecture because I could feel the instructor's effort! It's the lecture I've listened to the most diligently among the lectures I've taken recently. I really want to do well in the interview and get a job, fighting! +) Do you like Big Stone, Mid Suits?! I was happy to see the two main characters in the background ㅋㅋㅋ

What you will gain after the course

  • Design Pattern

  • Operating System

  • network

  • database

  • Data structure

  • Preparation for the latest CS interview questions from N and K companies

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[From an actual Kakao internship job posting]

CS Knowledge Interview
How should I prepare? 💬

CS knowledge refers to design patterns, networks, operating systems, databases, and data structures. The problem was that studying these through academic textbooks was overwhelming due to the sheer volume, while studying through the internet often led to confusion due to incorrect information.

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To solve these problems, I wrote a book called "CS Knowledge Notes for Interviews" and created a course that covers all CS knowledge at once based on the content of this book and important topics not included in the book.

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The #1 IT Bestseller in Korea!
The book that explains CS fundamentals better than any other in South Korea

'CS Knowledge Notes for Technical Interviews'

Now meet it as video lectures on Inflearn.

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What are the advantages of this course?

This course contains the essential CS knowledge from the nation's #1 highest quality CS knowledge book, "CS Fundamentals for Interviews," as well as core CS knowledge not included in the book, in-depth CS knowledge to prepare for follow-up questions that lead to more questions, and knowledge to prepare for actual interview questions derived from the real interview experiences of the author, readers, and students.

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The image shows how to explain solutions for server overload caused by large-scale traffic through DEEP DIVE content, which was an actual interview question.

A whopping 25 hours!!
You can master CS knowledge with just this one course.

I want to complete everything related to "CS knowledge" with just this one course. I'm sorry, but you cannot prepare 100% for CS interviews by only studying past questions. I don't just study past questions, but the core fundamental concepts of CS, and even deep knowledge to prepare for questions that lead to more questions. I want to say that this is the right way to study CS knowledge.

A total of 500 pages of
amazing course materials provided!😎

Starting from essential developer knowledge to databases, operating systems, and interview tips, we provide a total of 500 pages of teaching materials that incorporate all the essential elements of CS knowledge. Through this, we've worked hard to ensure that this single course can cover the overall content of CS knowledge.

The content of the lesson plan is as follows.

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# Differences Frequently Asked in Interviews - Organized in Clean Tables ## 1. == vs === | Aspect | == (Loose Equality) | === (Strict Equality) | |--------|---------------------|----------------------| | Type Conversion | Performs type coercion | No type coercion | | Comparison | Compares values after converting types | Compares both value and type | | Example | `'5' == 5` → true | `'5' === 5` → false | | Recommended Use | Generally avoid | Recommended for most cases | ## 2. null vs undefined |

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Terms that might be confusing or need additional explanation are organized in the [Appendix]

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A precise explanation of the often confusing REST API.

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A frequently asked question and a demonstration of building a shopping mall ERD, which is deep knowledge

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When explaining JWT tokens in lectures, typically only a single JWT token is covered, but in actual practice when using JWT, authentication logic is performed based on two tokens: an access token and a refresh token. This is the most accurate way to explain it.

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A demonstration of practicing JWT token authentication logic with simpler yet production-quality code suitable for real-world use.

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A scene showing explanations with fun illustrations that remain in memory for a long, long time.

Cramming for the exam?
Study based on importance!

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If you don't have time, you can just watch the high-priority lectures! While it's best to watch all the lectures... I've set the importance levels based on stars for those who are cramming.

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No more studying countless major textbooks and

I want to eliminate the need to scour the internet while studying.

Don't waste your time

I hope you can finish your "CS knowledge" interviews with just this one course.


Check out the curriculum.
📚

Design patterns, networks, operating systems, databases, data structures - learn CS fundamentals based on actual interview questions.

Chapter 0
Essential Knowledge for Developers

Essential knowledge that developers must know and frequently appears in interviews - this course provides detailed explanations of prerequisite knowledge needed by developers, including JSON, API, XML, Docker, containers, and more.

Chapter 1
Design Patterns

Libraries and frameworks fundamentally incorporate design patterns. Perhaps because of this, interviews sometimes ask about design patterns as a way to gauge whether you know libraries well. This course covers not only the concepts of design patterns but also shows how they are actually implemented in real libraries.

Chapter 2
Network

It explains important concepts in networking such as IP, HTTP, and REST API, and uses follow-up questions to cover topics like solving large-scale traffic issues - explaining important parts in depth while covering less critical parts with just the essentials.

Chapter 3
Operating System

It provides an overview of operating systems and explains processes, system calls, kernels, memory structures, and more in detail.

Chapter 4
Database

Starting with the fundamentals of databases like entities, this course focuses on explaining the important aspects of databases including transactions, indexing, isolation, normalization processes, and database deadlocks.

Chapter 5
Data Structures

First, we'll explore the fundamentals of data structures by explaining time complexity and space complexity, then cover all essential data structures including queues, stacks, and more.

Chapter 6
Interview Know-How

If we've covered CS interviews so far, I'll share insights based on the "model answers" I actually gave during personality interviews and technical interviews I've experienced.

* Note: All course code is available at https://github.com/wnghdcjfe/csnote!


What makes this course
different? 😎

  • Korea's #1 IT Bestseller, based on "CS Knowledge Notes for Interviews" with the highest quality
  • ✅ Learn actual interview questions from major IT companies + essential knowledge needed for CS interviews
  • ✅ Revealing model interview answers actually given in interviews at top-tier Korean companies like Naver and Kakao
  • ✅ Providing an impressive 500-page course material and over 240 lectures!
  • You can completely learn the CS knowledge needed for interviews
  • Korea's Best CS Knowledge Course
  • I'm ready to begin translating. Please provide the Korean text you'd like me to translate to English.

Average rating 5.0!
We take pride in being the best course. 🔥

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https://inf.run/Dj2Uh

I believe that a course that is continuously updated is the best course. Proving this, in 2022, it was selected as the most updated course among all courses on Inflearn. I will always strive to quickly reflect feedback from students and areas that need improvement so that you can take the best course possible.

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https://inf.run/pNdzP

2023. It was selected as the course that received the most reviews among all courses on Inflearn. It has received such a great response from many students, and I am confident that it is a course that greatly helps students with their CS interviews.


Knowledge Creator Interview 💬

Q. Who would you recommend this course to?

I would recommend this to those who have some programming experience and are now preparing for interviews to get into their desired companies but don't know what to prepare, as well as non-majors or majors who want to build solid CS knowledge.

Q. Can I prepare for all CS interviews with this course?

Yes, it is possible. First, most of the content in this course is prepared based on concepts from actual CS interview questions. In other words, this course is prepared based on questions from real major IT companies. Second, I believe it is more solid because it is prepared based not only on my experience but also on the interview experiences of my developer acquaintances. Third, we prepare not only for past questions but also for core CS knowledge concepts that are likely to appear. Furthermore, if students suggest that certain concepts are needed, we review and create content to prepare for "the latest questions" as well. Therefore, I believe you can prepare for CS interviews with this course alone.

Q. How long does it take to receive a response to a question?

You can receive a response as quickly as within 1 hour, but typically you should expect it within 1 to 3 days. (Excluding weekends and holidays)

Q. What's the best way to study with this course?

Well... actually, I would like you to study by memorizing all the content of this course. This is because this course covers comprehensive and core CS content + deep knowledge + interview questions, so if you memorize everything in this course, I believe you'll be perfectly prepared for CS interviews. That's why you need to study slowly. I think it's best to spend about 30 minutes to 1 hour a day watching the lectures, understanding and memorizing them, and taking about 2 months to study step by step.

Q. It seems like the practice sessions are mainly focused on Java or JavaScript. I primarily work with Go or Python - will I be able to understand?

If you know at least one programming language, I've explained it in a way that's easy to understand and prepared the code at that level of difficulty.


Recommended for
these people

Who is this course right for?

  • Developers who have some programming experience and want to learn CS knowledge

  • Majors or non-majors who want to learn CS knowledge

Need to know before starting?

  • You should know at least one programming language.

Hello
This is

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9,757

Learners

682

Reviews

3,362

Answers

4.8

Rating

3

Courses

- CurrentAbyss CEO and Lead Developer

- Former Naver Developer

- 5th-year algorithm instructor (Produced successful candidates for Naver / Kakao / LINE / Samsung coding tests)

- 2019, 2020 Major IT Company Coding Test Passer (All Solved)

- Top 0.1% on Baekjoon Online Judge

- 2024 Meta Hacker Cup Algorithm Competition R1 Top 12%

- JavaScript testing framework Mocha.js contributor

- Author of 《 CS Fundamentals for Interviews 》 2022 / #1 Bestselling IT book in Korea

- Author of 《 Mastering MEVN by Building a Real-Time Monitoring System 》 2021 / Ranked 63rd Best Seller in Domestic IT Books

- Blog/ YouTube 

 

Curriculum

All

213 lectures ∙ (25hr 10min)

Course Materials:

Lecture resources
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