[CS Technical Interview 7] JavaScript That Makes Sense

Name: [CS Technical Interview 7] JavaScript That Makes Sense
Price: 24200 KRW
Rating: 5 (7 reviews)

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.

(5.0) 7 reviews

264 learners

yiyj10305235

javascript

자바스크립트

3시간 만에 완강할 수 있는 강의 ⏰

비전공자

JavaScript

Tech Interview

kakao-tech

kakao-recruitment

Reviews from Early Learners

What you will gain after the course

Understanding JavaScript's Operating Principles Based on Scope and Execution Context
Organizing core concepts like closures, prototypes, and this binding to interview level
Learning Asynchronous Processing (Promise, async/await) and Event Loop Operating Mechanisms
Understanding the Structure and Loading Strategies of Module Systems (ESM, Dynamic Import)
Learning How to Clearly Answer Advanced JavaScript Concept Questions in Technical Interviews

🗣 For actual interviews, 'speaking practice' was important.

Even after filling in my CS fundamentals, interviews weren't easy. At a certain company's interview, I was asked about floating-point numbers. It was content I thought I had read and understood multiple times in books, but I couldn't utter a single word. That's when I realized it. Passive learning through simply reading and understanding cannot provide answers in real situations.

To succeed in interviews, you need not only to accumulate a lot of knowledge but also the ability to explain this knowledge. This 'ability to explain' can only be developed through practicing to organize concepts in just a few sentences and articulate them out loud. Through this process, you can also discover what you didn't know precisely. Without sufficient practice, you'll encounter the following problems.

1. Conceptual Confusion Type

❓Interviewer What are the characteristics of object-oriented programming?
💬 Candidate The SOLID principles. First, S is..(omitted)...
This is a case of confusing similar concepts.
SOLID is an OOP design principle, while the characteristics of object-oriented programming are abstraction, encapsulation, inheritance, and polymorphism.
The moment you mix up related concepts, the interviewer judges that 'your fundamentals are shaky.'
It's not just a simple mistake, but rather it's read as a signal that your conceptual framework is not solidly established.

2. Lack of Specificity Type

❓Interviewer What are the characteristics of TCP?
💬 Candidate It's a protocol that guarantees reliability.
❓ Interviewer What are the mechanisms that guarantee reliability?
💬 Candidate Uh... well... it makes transmission safe... like that...
This is a case where you only know the What, but are missing the How/Why.
You only know the surface-level answers and aren't prepared to explain the underlying principles.
TCP establishes communication through connection (3-way handshake), ensures reliability through RDT (sequence numbers, ACK, retransmission, etc.), and maintains quality through flow control and congestion control.
These concepts should be connected as one cohesive flow in your mind. Without organizing concepts concretely, you cannot prepare for follow-up questions.

3. Being speechless at basic questions

❓Interviewer What is HTTP?
💬 Candidate Um... it's for sending and receiving data on the web... something like that...?
It's such a familiar concept, but when asked to explain it in one sentence, the words don't come easily.
Words like request, response, server, and client come to mind, but they don't flow together into a natural sentence.
This is because we've never practiced explaining from definition to principles in one coherent flow.
This isn't a lack of knowledge, but an absence of structure.

Just knowing is not enough. It only becomes true skill when you can express it in words.

1⃣ Short and highly focused runtime

With a comfortable lecture duration, you can complete the course even with a busy schedule and quickly review right before interviews.
Compressed to the essentials, designed so you can complete the entire course in a short amount of time
I focused on the point that the greatest learning effect comes from completing the course itself, rather than accumulating courses like shopping.

2⃣ Interview-focused lectures summarizing only the essentials

I have compiled and organized the essential concepts and principles that must be reviewed before an interview.
While building fundamental skills, I ultimately structured it to be used for interview preparation
It's not just a simple summary, but structured with diagrams and easy explanations so that even non-majors can fully understand it.
You can quickly organize key content while learning with a clear understanding of why it's important.

3⃣ Appendix [Interview Practice] Included

In interviews, the ability to explain things clearly is much more important than simply knowing something
However, organizing and practicing on your own is not easy and is a tedious task.
At the end of the lecture materials, we include "answering in one or two sentences" training to reduce the effort of summarizing.

"How can I maximize my learning efficiency even more?"
"Will this course alone really be enough for speaking practice?"

After much deliberation, the Technical Interview Practice Workbook was born.
You can practice speaking out loud as if in a real interview.

This is a file provided separately from the lecture materials,
and it focuses on enabling you to express
what you've understood in your own words.

Curious about the workbook structure or how to use it?
You can check it out in detail right now in the workbook introduction video at the beginning of the course.

1⃣ Download the materials and learn key concepts while listening to the lectures.
2⃣ Take notes on important parts to create your own CS interview notes.
3⃣ Save them on your phone and review them briefly whenever you have time.

If you have an interview coming up,
and you don't have much time → Use the appendix [Interview Practice] in the course materials to quickly sharpen your interview skills.
If you have time → Complete your speaking practice like a real interview with the Technical Interview Practice Workbook.

🖐 Hello! Let me introduce myself! 🙇

I created this course while thinking of my past self, who stayed up all night worrying about fundamentals and had my heart racing over a single interview question.

I started as a non-CS major and understand better than anyone the thirst for fundamentals (CS knowledge, programming languages, etc.). Through self-studying countless materials and building my own know-how, I eventually graduated from Seoul National University and now work as a 🧑🏻‍💻 Kakao developer.

Since childhood, I've been more confident than anyone in combining and restructuring various materials to create 'my own comprehensive study notes.' This course is precisely that secret notebook born from my 'ultimate self-study know-how' and all my passion and philosophy.

🔥 What makes this course special?

All of my 'know-how' is included: As a non-CS major, I have fully incorporated my experience and know-how of self-studying CS and programming languages and getting hired at a large corporation. I have included in this course all the methods for how to most efficiently understand complex and abstract concepts and make them your own.
'Fundamentals' are key in any development field: Whether you're aiming for game development, AI, web/app development, or any other field, basic computer science knowledge is not optional but essential. This course helps you become a true expert based on solid fundamentals.
We compete with 'overwhelming quality': I've referenced countless materials including textbooks, famous university lectures, commercial books, and technical interview resources to extract core keywords and reconstruct them in my own unique way. With intuitive diagrams and illustrations, plus easy explanations infused with my practical experience, I promise to make even complex concepts click with that "Ah, now I get it!" moment.

🚀 Introducing the seventh lecture of the Technical Interview Master Roadmap, the [JavaScript] edition.

📕 JavaScript is not a language where knowing just the syntax is enough.

You know variables but are confused about scope/hoisting/TDZ❓
Are you stuck on explaining why 'this' differs depending on how it's called❓
Is it difficult to structurally explain the difference between prototypes and classes❓
Event Loop·Microtasks·Promise·async/awaitIs it difficult to confidently explain the execution order❓

Understanding the 'operating principles' like scope, execution context, closures, prototypes, and event loops is what gives you real power in practical work and interviews. This course clearly organizes JavaScript's internal workings through diagram-centered, flow-centered, and practice-centered approaches rather than memorization, providing an experience where "words flow naturally" in interview situations.

🎯 Through this course, you will be able to clearly answer the following questions.

What are scope and execution context, and why are they necessary?

→ Understand why hoisting and TDZ occur through the identifier search/initialization rules determined by lexical environment and execution context.
How is this binding determined?
→ Summarizes the default/explicit/new binding rules and the differences between call/apply/bind with examples.
What is a closure and when is it useful?
→ Covers the pros and cons in a balanced way, from encapsulating external state and utilizing in events/callbacks to precautions about memory leaks.
What's the difference between prototypes and classes?
→ We compare prototype chains, method sharing principles, and the abstraction that class syntax provides through diagrams.
How does the event loop work?
→ Visualize the call stack, task queue, and event loop, and learn the principles of Promise and async/await.
What is the DOM and how do you manipulate it?
→ Explains node selection and manipulation, event propagation (capturing/bubbling), and preventDefault/stopPropagation together.
Why are script loading strategies important?
→ We'll organize the differences between defer·async·type="module", ES modules·dynamic import, and code splitting.

📌 At the end of the lecture, a practical interview practice chapter awaits you.

You can also practice answering common interview questions like "Explain execution context in one sentence," "Why are closures necessary?," "Explain prototype inheritance with a diagram," "Explain the difference between Promise and async/await in terms of execution order," and "Why is bubbling useful?" in one or two sentences on your own.

Scope and Execution Context
- Scope, Lexical Environment, Execution Context, Hoisting, TDZ, this keyword, Explicit Binding, JS Runtime
Closure
- The concept and operating principles of closures, advantages and disadvantages from data encapsulation and memory management perspectives
JavaScript Operating Principles
- Single-threaded structure, synchronous vs asynchronous processing flow, how the event loop works (call stack, task queue)
Asynchronous Programming
- Callback functions and callback hell, Promise state changes and chaining, async/await syntax and error handling
Prototype and Inheritance
- Object Creation Methods and Constructor Functions,
  The concept and connection structure of prototypes,
  Various Prototype Inheritance Methods
Working with Arrays and Objects
- Array methods like map, filter, reduce, object destructuring and spread operator
JavaScript Module System
- ES module system structure, differences between import/export, dynamic import and code splitting
Browser and JavaScript
- JavaScript execution preparation process, script loading strategies, DOM and events, event propagation
[Appendix] Interview Practice
- Review the main concepts once more in a Q&A format

Recommended for
these people

Who is this course right for?

Those who know the basic syntax of JavaScript but want to systematically organize the principles of how it works
Those who want to deeply understand common interview topics such as execution context, closures, prototypes, and asynchronous programming
Job seekers who want to confidently answer JavaScript-related questions in technical interviews
Those who want to understand code execution flow and performance optimization principles to immediately apply them in practical development

Need to know before starting?

Javascript Basic Syntax

Hello
This is

2,386

Learners

118

Reviews

Answers

4.9

Rating

Courses

About Me

카카오에서 서버 개발자로 일하며, CS 개념을 빠르게 이해하고
면접에서 말로 풀어낼 수 있도록 돕는 '말이 트이는 CS' 시리즈를 만들고 있습니다.

학력 및 경력

서울대학교 졸업
現 카카오 서버 개발자

강의 철학

컴퓨터 비전공자로 개발을 시작해 CS 기초부터 기술 면접까지 직접 정리하며 시행착오를 많이 겪었습니다. 그 과정에서 쌓인 학습법과 개념 정리 노하우를 바탕으로, 실무와 면접에서 꼭 마주치는 핵심만 선별해 도해와 쉬운 흐름으로 누구나 이해하고 설명할 수 있도록 만드는 콘텐츠를 제작하고 있습니다.
"그때의 저에게 필요했던 강의를 만들고 있습니다."

강의 스타일

핵심만 3~4시간에 압축
도해 중심의 구조적 설명
면접 질문을 기준으로 구성
워크북으로 실전 답변까지 연습

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yiyj1030.tistory.com
→ CS, 알고리즘, 실무 개념을 쉽고 정리하는 기술 블로그 운영 중

Contact

yiyj1030@gmail.com

Curriculum

All

40 lectures ∙ (3hr 33min)

Course Materials:

Lecture resources

Section 1. INTRO: Course Introduction and Table of Contents Overview

4 lectures ∙ (10min)

Section 2. Scope and Execution Context

10 lectures ∙ (56min)

Section 3. Closure

2 lectures ∙ (8min)

Section 4. JavaScript Operating Principles

3 lectures ∙ (18min)

Section 5. Asynchronous Programming

6 lectures ∙ (35min)

Section 6. Prototype and Inheritance

5 lectures ∙ (25min)

Section 7. Handling Arrays and Objects

3 lectures ∙ (11min)

Section 8. JavaScript Module System

2 lectures ∙ (13min)

Section 9. Browser and JavaScript

4 lectures ∙ (24min)

Section 10. Appendix [Interview Practice]

1 lectures ∙ (9min)

Published:

Last updated:

Reviews

All

7 reviews

5.0

7 reviews

dlatjdgns2839112
Reviews 2
∙
Average Rating 5.0
5
32% enrolled
Great for preparing CS for in-person interviews!!
ghdtjgus76319152
Reviews 1
∙
Average Rating 5.0
5
37% enrolled
I enjoyed it so much! I'm curious if you have any intention of creating a React course as well. After listening to all the CS courses and then the JS course, I feel like I understand a lot more by connecting them, so I'd love to study React too!
- yiyj10305235
  Instructor
  I'm glad it was helpful. 😊😊 Unfortunately, there are no plans for React yet 😢😢
12313
Reviews 5
∙
Average Rating 5.0
5
100% enrolled
It was great to be able to comprehensively review and quickly check JavaScript overall. The learning materials also included diagrams, which made it easy to organize the content in my head into writing or speech.
seohyeoniii
Reviews 10
∙
Average Rating 5.0
5
47% enrolled
This is a course where you can set aside about a day to organize the major concepts of JavaScript all at once! It's great as a reminder before interviews👍
misungdev0784
Reviews 1
∙
Average Rating 5.0
5
30% enrolled

$18.70

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[CS Technical Interview 7] JavaScript That Makes Sense

Reviews from Early Learners

What you will gain after the course

🥲 Getting a developer job, coding tests weren't the end of it.

🗣 For actual interviews, 'speaking practice' was important.

2. Lack of Specificity Type

3. Being speechless at basic questions

Just knowing is not enough. It only becomes true skill when you can express it in words.

🔥 That's why we created it. The CS Technical Interview Series That Gets You Talking!

🎯 Recommended for these people

⚡ Lecture Core Kick

📘 Technical Interview Practical WorkbookProvided

💡 Use it like this

💬 Q. The lecture time is short, but will I be able to learn properly?

🖐 Hello! Let me introduce myself! 🙇

I created this course while thinking of my past self, who stayed up all night worrying about fundamentals and had my heart racing over a single interview question.

🚀 Introducing the seventh lecture of the Technical Interview Master Roadmap, the [JavaScript] edition.

📕 JavaScript is not a language where knowing just the syntax is enough.

🎯 Through this course, you will be able to clearly answer the following questions.

📌 At the end of the lecture, a practical interview practice chapter awaits you.

📖 A curriculum packed with only the essentials

✏ Here's what you'll learn

2⃣ Step-by-step flow explanation using diagrams, notes, and code

3⃣ Pattern-based examples to develop practical skills

4⃣ Key Questions Summary for Technical Interview Preparation

👀 Course Preview

💡 Curious about other interview preparation courses? Check out the roadmap below :)

🔗 Technical Interview Master Roadmap

Pre-enrollment Reference Information

Recommended for
these people

Hello
This is

Curriculum

Reviews

yiyj10305235's other courses

Similar courses

[CS Technical Interview 7] JavaScript That Makes Sense

Reviews from Early Learners

What you will gain after the course

🥲 Getting a developer job, coding tests weren't the end of it.

🗣 For actual interviews, 'speaking practice' was important.

2. Lack of Specificity Type

3. Being speechless at basic questions

Just knowing is not enough. It only becomes true skill when you can express it in words.

🔥 That's why we created it. The CS Technical Interview Series That Gets You Talking!

🎯 Recommended for these people

⚡ Lecture Core Kick

📘 Technical Interview Practical WorkbookProvided

💡 Use it like this

💬 Q. The lecture time is short, but will I be able to learn properly?

🖐 Hello! Let me introduce myself! 🙇

I created this course while thinking of my past self, who stayed up all night worrying about fundamentals and had my heart racing over a single interview question.

🚀 Introducing the seventh lecture of the Technical Interview Master Roadmap, the [JavaScript] edition.

📕 JavaScript is not a language where knowing just the syntax is enough.

🎯 Through this course, you will be able to clearly answer the following questions.

📌 At the end of the lecture, a practical interview practice chapter awaits you.

📖 A curriculum packed with only the essentials

✏ Here's what you'll learn

2⃣ Step-by-step flow explanation using diagrams, notes, and code

3⃣ Pattern-based examples to develop practical skills

4⃣ Key Questions Summary for Technical Interview Preparation

👀 Course Preview

💡 Curious about other interview preparation courses? Check out the roadmap below :)

🔗 Technical Interview Master Roadmap

Pre-enrollment Reference Information

Recommended for these people

HelloThis is .css-1q3zd4q{text-decoration-line:underline;text-underline-position:under;text-underline-offset:1px;}

Curriculum

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Hello
This is