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[CS Technical Interview 7] JavaScript that gets you talking

A course where you understand core JavaScript concepts and train to explain them verbally for interviews.

(5.0) 15 reviews

339 learners

Level Basic

Course period Unlimited

JavaScript
JavaScript
Tech Interview
Tech Interview
JavaScript
JavaScript
Tech Interview
Tech Interview

Reviews from Early Learners

Reviews from Early Learners

5.0

5.0

한지웅

63% enrolled

I'm enjoying this so much. I've been using JavaScript without this kind of deep understanding, but it's so interesting how you explain each technology by covering the situation before it was introduced and the reasons why it was adopted. I'm even doing Google searches and asking GPT questions while listening. I'd like to purchase and listen to your other courses too.

5.0

..

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!

5.0

강냉

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.

What you will gain after the course

  • Understanding Core JavaScript Concepts

  • The ability to explain verbally in technical interviews

  • Practical workbook PDF to prepare for follow-up questions

말이 트이는 CS 기술면접 소개 포스터

🥲 Have you ever had an experience like this in an interview?

1. When answering with confused concepts

❓Interviewer What are the characteristics of object-oriented programming?
💬 Candidate It's the SOLID principles. First, S stands for......(omitted)...

This is a situation where the characteristics of object-oriented programming (abstraction, encapsulation, inheritance, polymorphism) and the object-oriented design principles (SOLID) are confused.
This can give the impression that the foundation of basic concepts has not been established.

2. Knowing only the "What," but failing to explain the "How" or "Why"

❓Interviewer: What are the characteristics of TCP?
💬 Candidate: It is a protocol that guarantees reliability.
❓ Interviewer: What is the mechanism that guarantees reliability?
💬 Candidate: Uh... well... it's like... making sure it's transmitted safely... sort of...

You only know the superficial definitions and are not prepared to explain the principles.
If the 3-way handshake, sequence numbers, ACK, retransmission, flow control, and congestion control are
not connected into a single cohesive flow, you will inevitably get stuck on follow-up questions.

3. When you get tongue-tied on basic questions

❓Interviewer: What is HTTP?
💬 Candidate: Uh… it's for sending and receiving data on the web… something like that…?

It is a very familiar concept, but when you actually try to explain it in a single sentence, the words don't come out.
This is not a lack of knowledge, but a lack of experience in organizing and speaking it aloud.


Knowing is not enough. It only becomes a skill when you can express it in words.

🔥 So, this is how we've structured it.

✦ Next-level, premium content for interview preparation

1⃣ CS notes organized specifically for interview preparation

  • Concepts and principles that must be checked before an interview are gathered together and provided as lecture materials.

  • It is structured so that you can build your fundamentals while being able to pull it out and review it right up until the interview.

  • It is not just a simple summary, but includes diagrams and easy explanations so that even non-majors can fully understand it.


Example of Computer Architecture Lecture Materials

2⃣ Appendix｜Interview practice materials provided

  • In an interview, the ability to explain clearly is much more important than simply knowing the information.

  • However, organizing and practicing on your own is a difficult and tedious task.

  • At the end of the lecture materials, I have included "answering in one or two sentences" training to save you the trouble of organizing it yourself.


Database Lecture Appendix Example

3⃣ Providing a Technical Interview Practice Workbook PDF to prepare even for follow-up questions

  • "Will this lecture alone really be enough for speaking practice?"
    After much deliberation,

    I have created a practical technical interview workbook.

  • It is designed so that you can practice speaking like a real interview on your own.

  • You can find detailed information on the structure and usage of the workbook in the introduction video at the beginning of the course.

Operating System Workbook Example

4⃣ A course that keeps growing with a single purchase

  • This course is provided with unlimited access.

  • The content will continue to expand with new supplementary explanations, additional examples, and more.

  • Even if the price increases as content is added, students who have already purchased the course
    can access all content at no additional cost.

  • This is a CS guidebook that you can return to and refer to whenever you need it.

💡 Here is how to make the most of this abundant content

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

If you're short on time before the interview →
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..

🎯 Recommended for the following people

Non-majors, job seekers, those preparing for a career change, etc., who are facing technical interviews and need to be able to explain CS fundamentals verbally

CS majors who need to organize their knowledge again

I have studied it before, but
I don't know where to start organizing all that vast CS knowledge again

Don't open those thick textbooks
ever again.
We will organize only the core essentials clearly.

Non-majors who feel overwhelmed by CS

It's my first time preparing for a technical interview,
so I'm overwhelmed and don't know
where to start

By following the roadmap,
you can focus on learning
only the key CS core concepts..

Job seekers preparing for a career move with limited time

Enough, I don't have time.
I need to
quickly summarize only the CS topics that appear in interviews.

There are lecture materials and
interview chapters that allow for
quick review on your own.

🔥 Reviews from students who experienced it first

A truly helpful lecture.
Already proven by 3,000+ students.

⭐️⭐️⭐️⭐️⭐️

1. A lecture that shows how much the author has thought and agonized from the student's perspective (it seems the flow of the learner's understanding was well-considered).
2. Understanding is easy thanks to the variety of visual aids and examples.
3. When learning new knowledge, it connects information by mentioning and reminding you of previously learned content. As the knowledge connects, the big picture begins to form.
4. The depth of knowledge is not shallow. I'm taking the Operating Systems course right after Computer Architecture, and the synergy is great.
5. It perfectly scratches the itch of "why" and "why we use it."
ps. I'm sorry to the author, but... this is a lecture I want to keep all to myself.

-'Operating System' Course Review

⭐️⭐️⭐️⭐️⭐️

Despite the short lecture time, I really like how you clearly explain only the important parts. Since it's mostly a theoretical course, I didn't expect you to cover SQL queries, but I loved how you taught basic syntax and how to write queries by showing examples one by one. After that, the sections on Join, Normalization, Transactions, Indexing, Data Optimization, and Security were all great. Although I haven't taken other paid courses yet, the last lecture appendix titled "Interview Practice" was very helpful for self-study and practice as it provided direct questions and answers. Since the lecture time isn't too long if you stay focused, I think I'll watch it a few more times. Thank you.

- 'Database' Course Review

⭐️⭐️⭐️⭐️⭐️

The core content was explained so clearly and with such a logical flow that it helped me quickly organize my understanding of data structures. Thank you for the great lecture.

-'Data Structures' Course Review

⭐️⭐️⭐️⭐️⭐️

Wow... this is seriously so good...;;;; I need to save up and buy the entire roadmap.. I'm curious if you have any plans to make lectures on Spring as well.. I'll buy them immediately..

- 'Java and Object-Orientation' Course Review

⭐️⭐️⭐️⭐️⭐️

This is a lecture where you can organize the key concepts of JavaScript all at once by setting aside about a day! It's great for a quick reminder before an interview👍



- 'JavaScript' Course Review

⭐️⭐️⭐️⭐️⭐️

As a non-CS major, I was worried about how to study CS knowledge, especially computer architecture and operating systems. However, the amount of content was appropriate, so I could learn without feeling overwhelmed, and I really loved that it felt like getting private tutoring from an expert. I plan to take the operating systems lecture as well, and I'm looking forward to it. Thank you!

-'Computer Architecture' Course Review

🖐 Hello! Let me introduce myself! 🙇

As someone from a non-major background, when I first started preparing for a job as a developer, I focused solely on algorithms and coding tests.
I gained a fair amount of confidence and began passing most coding tests, but I continued to fail at the next hurdle: technical interviews. What was the problem? It was the lack of CS (Computer Science) knowledge.

I understand the thirst for fundamental skills (CS knowledge, programming languages, etc.) better than anyone else. I built my own know-how by digging through countless materials on my own, and now I am working as a 🧑🏻‍💻 Kakao Developer.

Since I was young, I have been more confident than anyone else in combining and reorganizing various materials to create my own "all-in-one summary notes." This lecture is the secret notebook that contains all of that know-how and passion.

🚀 The seventh subject of the Fluent CS Series is JavaScript.

  • Is it difficult for you to explain the structural differences between prototypes and classes?

  • Is it difficult for you to confidently explain the execution order of the event loop, microtasks, Promises, and async/await?


📖 A curriculum packed with only the essentials đầy đủ những nội dung cốt lõi

This is the table of contents and key keywords you will learn in this course.

If there are any unfamiliar keywords, take this opportunity to master them once and for all.

  1. Scope and Execution Context

    • Scope, Lexical Environment, Execution Context, Hoisting, TDZ, this keyword, Explicit Binding, JS Runtime


  2. Closure

    • The concept and operating principles of closures, and their advantages and disadvantages in terms of data encapsulation and memory management.

  3. JavaScript Engine Mechanics

    • Single-threaded architecture, synchronous vs. asynchronous processing flow, and the mechanics of the event loop (call stack, task queue)

  4. Asynchronous Programming

    • Callback functions and callback hell, Promise state transitions and chaining, async/await syntax and error handling

  5. Prototypes and Inheritance

    • Object creation methods and constructor functions,

      The concept of prototypes and their connection structure,

      Various prototype inheritance methods

  6. Handling Arrays and Objects

    • Array methods such as map, filter, and reduce, object destructuring, and the spread operator

  7. JavaScript Module System

    • ES module system structure, differences between import/export, dynamic import and code splitting

  8. Browser and JavaScript

    • JavaScript execution preparation process, script loading strategies, DOM and events, event propagation

  9. [Appendix] Interview Practice

    • Review the key concepts once more in a Q&A format

✏ Here is what we will cover

1⃣ Core JavaScript Mechanisms Understood Through Flow

  • Understand through flowcharts and timelines how complex mechanisms such as scope, execution context, event loop, and call stack are connected and operate.

실행 컨텍스트 생성 과정

Execution Context Creation Process

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

  • A structure that combines visuals + code + handwritten notes rather than simple memorization
    → Learn complex concepts naturally by combining notes with execution results
    → A 'review-oriented lecture' format that you can reopen and organize even while taking the course

스코프의 정의와 종류

Definition and Types of Scope

3⃣ Pattern-oriented examples to build practical skills giúp nâng cao cảm giác thực tế

  • Structured so that you can understand patterns encountered in practice, such as prototype inheritance, event delegation, and module loading strategies,
    along with the reasons behind them.

class 기반 프로토타입 상속 예시

Example of class-based prototype inheritance

👀 Lecture Preview

If the video is frozen, please refresh the page :)

How to overcome the limitations of a single thread: Event Loop

How Promises work and methods for follow-up handling

말이트이는 CS 시리즈

Notes before taking the course

  • Format of provided learning materials: PDF

  • This course does not require any prior knowledge.


Recommended for
these people

Who is this course right for?

  • A non-major who feels overwhelmed because it's their first time studying CS.

  • CS majors who need to organize CS concepts before a technical interview

  • A job seeker preparing for a career move who is short on time ahead of a technical interview.

Need to know before starting?

  • Basic JavaScript Syntax

Hello
This is yiyj10305235

4,409

Learners

182

Reviews

28

Answers

4.9

Rating

7

Courses

Education and Experience

  • Graduate of Seoul National University

  • Current Kakao Server Developer

    Course Introduction I am creating the "Fluent CS" series to help you articulate CS concepts during interviews. Course Philosophy Having started development as a non-computer science major, I understand the importance of CS...

Course Introduction I am creating the "CS for Speaking" series to help you articulate CS concepts during interviews. Course Philosophy Having started development as a non-computer science major, I...

Course Introduction

I am creating the
CS Speaking series to help you articulate CS concepts during interviews.

Teaching Philosophy

I started my development career as a non-CS major and went through a lot of trial and error while personally organizing everything from CS fundamentals to technical interviews. Based on the learning methods and conceptual organization know-how accumulated through that process, I create content that makes core concepts encountered in practice and interviews easy to understand through illustrations.
"I am creating the lectures that I needed back then."

Blog yiyj1030.tistory.com → Running a tech blog that simplifies CS, algorithms, and practical concepts. Contact yiyj1030@gmail.com

Blog

  • yiyj1030.tistory.com
    → Running a tech blog that simplifies and organizes CS, algorithms, and practical concepts

Contact

yiyj1030@gmail.com

More

Curriculum

All

40 lectures ∙ (3hr 33min)

Course Materials:

Lecture resources
Published: 
Last updated: 

Reviews

All

15 reviews

5.0

15 reviews

  • wlgus74641980님의 프로필 이미지
    wlgus74641980

    Reviews 1

    ∙

    Average Rating 5.0

    5

    60% enrolled

    It's good that it focuses on the difficult parts and core concepts rather than covering all of JavaScript.

    • dilkusha27님의 프로필 이미지
      dilkusha27

      Reviews 9

      ∙

      Average Rating 5.0

      5

      60% enrolled

      The concepts and examples were explained so clearly that it was very easy to understand!

      • fined0006806님의 프로필 이미지
        fined0006806

        Reviews 46

        ∙

        Average Rating 4.7

        5

        100% enrolled

        I already knew this content, but I took the course because I was curious about how someone else would explain it. It was good for review.

        • hochoi86214872님의 프로필 이미지
          hochoi86214872

          Reviews 11

          ∙

          Average Rating 5.0

          5

          30% enrolled

          I'm learning things I didn't know while reviewing what I studied

          • smkr967024님의 프로필 이미지
            smkr967024

            Reviews 3

            ∙

            Average Rating 5.0

            Edited

            5

            63% enrolled

            I'm enjoying this so much. I've been using JavaScript without this kind of deep understanding, but it's so interesting how you explain each technology by covering the situation before it was introduced and the reasons why it was adopted. I'm even doing Google searches and asking GPT questions while listening. I'd like to purchase and listen to your other courses too.

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            Through this course, students will broadly learn the basics and advanced concepts of JavaScript, from setting up the development environment to variables, conditional statements, functions, objects, and arrays. Through thorough review with practice exercises and quizzes, they will be able to develop problem-solving skills that can be immediately applied to web and mobile development practices.

            Beginner

            Beginner

            JavaScript, HTML/CSS, Web Application

            Learning JavaScript Properly: A Complete Guide from Beginner to Professional Part 1 - [Basics]Course Thumbnail

            Learning JavaScript Properly: A Complete Guide from Beginner to Professional Part 1 - [Basics]

            nhcodingstudio

            $15.40

            21%

            $12.10

            Beginner / JavaScript, HTML/CSS, Web Application

            4.0

            (1)

            Mobile, tablet, pc responsive instagram clone codingCourse Thumbnail

            Mobile, tablet, pc responsive instagram clone coding

            jeong4726

            $23.10

            Basic / HTML/CSS, JavaScript, Clone Coding

            5.0

            (1)

            Through this lecture, students can create a web service similar to Instagram using HTML, CSS, and JS. (Only the front-end is implemented! The back-end server construction will be filmed in a later lecture.)

            Basic

            Basic

            HTML/CSS, JavaScript, Clone Coding

            Mobile, tablet, pc responsive instagram clone codingCourse Thumbnail

            Mobile, tablet, pc responsive instagram clone coding

            jeong4726

            $23.10

            Basic / HTML/CSS, JavaScript, Clone Coding

            5.0

            (1)

            Vue.js Complete Guide - Learning Practical Concepts Through Hands-on Practice and RefactoringCourse Thumbnail

            Vue.js Complete Guide - Learning Practical Concepts Through Hands-on Practice and Refactoring

            captain

            $59.40

            Intermediate / JavaScript, Vue.js

            4.9

            (382)

            4,800+

            This is a practical Vue.js course that follows the lineage of Do it! Vue.js Introduction -> Vue.js Beginner Course -> Vue.js Intermediate Course. It will help you fully utilize Vue.js in real-world work.

            Intermediate

            Intermediate

            JavaScript, Vue.js

            Vue.js Complete Guide - Learning Practical Concepts Through Hands-on Practice and RefactoringCourse Thumbnail

            Vue.js Complete Guide - Learning Practical Concepts Through Hands-on Practice and Refactoring

            captain

            $59.40

            Intermediate / JavaScript, Vue.js

            4.9

            (382)

            4,800+
            Learn React by Building It: BasicsCourse Thumbnail

            Learn React by Building It: Basics

            jayjinjay

            $34.10

            Basic / React, JavaScript

            4.8

            (181)

            1,500+

            This is an introductory React course that will teach you React the easiest and fastest way. Learn concepts and practical skills while creating a toy project and complete the entire course in just 3 hours, including deployment! This is the first course in a series consisting of beginner, intermediate, and advanced levels :)

            Basic

            Basic

            React, JavaScript

            Learn React by Building It: BasicsCourse Thumbnail

            Learn React by Building It: Basics

            jayjinjay

            $34.10

            Basic / React, JavaScript

            4.8

            (181)

            1,500+
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            Game Company Employment Mastery C++: Pass at Once with 10 Years of Past Exam Questions (Advanced Edition)

            burningcarrot

            $102.30

            Early Bird

            29%

            $72.60

            Beginner / C++, oop, Tech Interview, get a job

            New
            New

            Based on questions from major game companies such as Nexon, NCSoft, Krafton, and Netmarble, this covers core C++ concepts and problem-solving skills that job seekers and career changers must know. Pass job tests and technical interviews all at once with actual exam questions from the past 10 years.

            Beginner

            Beginner

            C++, oop, Tech Interview

            Game Company Employment Mastery C++: Pass at Once with 10 Years of Past Exam Questions (Advanced Edition)Course Thumbnail

            Game Company Employment Mastery C++: Pass at Once with 10 Years of Past Exam Questions (Advanced Edition)

            burningcarrot

            $102.30

            Early Bird

            29%

            $72.60

            Beginner / C++, oop, Tech Interview, get a job

            New
            New
            Quick look at the Javascript V8 engineCourse Thumbnail

            Quick look at the Javascript V8 engine

            hajeonghun

            $19.80

            Basic / JavaScript, Node.js, v8

            4.8

            (12)

            100+

            You can understand the JavaScript engine V8! You can get hints on how to write more efficient code.

            Basic

            Basic

            JavaScript, Node.js, v8

            Quick look at the Javascript V8 engineCourse Thumbnail

            Quick look at the Javascript V8 engine

            hajeonghun

            $19.80

            Basic / JavaScript, Node.js, v8

            4.8

            (12)

            100+
            Basic semiconductor post-processing testing (evaluation and analysis)Course Thumbnail

            Basic semiconductor post-processing testing (evaluation and analysis)

            hjsemi

            $34.10

            Beginner / Tech Interview, Embedded

            5.0

            (1)

            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.

            Beginner

            Beginner

            Tech Interview, Embedded

            Basic semiconductor post-processing testing (evaluation and analysis)Course Thumbnail

            Basic semiconductor post-processing testing (evaluation and analysis)

            hjsemi

            $34.10

            Beginner / Tech Interview, Embedded

            5.0

            (1)

            Real-world preparation! Complete mastery of DevOps interviews - BasicsCourse Thumbnail

            Real-world preparation! Complete mastery of DevOps interviews - Basics

            Dewey Hong

            $31.90

            Basic / Tech Interview, Terraform, Kubernetes, Ansible, CI/CD

            4.8

            (6)

            100+

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

            Basic

            Basic

            Tech Interview, Terraform, Kubernetes

            Real-world preparation! Complete mastery of DevOps interviews - BasicsCourse Thumbnail

            Real-world preparation! Complete mastery of DevOps interviews - Basics

            Dewey Hong

            $31.90

            Basic / Tech Interview, Terraform, Kubernetes, Ansible, CI/CD

            4.8

            (6)

            100+
            JavaScript & jQuery Core Theory and Practical Examples for Web Publishers (Textbook, Completed Version)Course Thumbnail

            JavaScript & jQuery Core Theory and Practical Examples for Web Publishers (Textbook, Completed Version)

            codingworks

            $26.40

            Basic / JavaScript, jQuery, HTML/CSS

            4.7

            (13)

            100+

            The JS Core Theory and Practical Examples textbook and completed version for web publishers is a lecture manual produced in PDF format. This textbook serves to help web publishers thoroughly master the fundamentals of JavaScript and jQuery that they must know. A key feature of this manual is that it allows you to solidify theory through "Small Missions" connected to each concept. In particular, it is a well-prepared textbook that includes practical examples utilizing all the theories learned. The total PDF spans over 320 pages covering both Vanilla JavaScript and jQuery, with Coding Works adding sufficient explanations to ensure easy understanding. Notably, it allows publishers to learn essential practical jQuery interaction examples required for website production.

            Basic

            Basic

            JavaScript, jQuery, HTML/CSS

            JavaScript & jQuery Core Theory and Practical Examples for Web Publishers (Textbook, Completed Version)Course Thumbnail

            JavaScript & jQuery Core Theory and Practical Examples for Web Publishers (Textbook, Completed Version)

            codingworks

            $26.40

            Basic / JavaScript, jQuery, HTML/CSS

            4.7

            (13)

            100+

            [CS Technical Interview 1] Computer Architecture That Opens Up Your Speech

            yiyj10305235

            Free

            Beginner / Computer Architecture, Tech Interview, computer-science

            4.9

            (77)

            2,100+

            A course that helps you understand core computer architecture concepts and practice explaining them verbally in interviews

            Beginner

            Beginner

            Computer Architecture, Tech Interview, computer-science

            [CS Technical Interview 1] Computer Architecture That Opens Up Your Speech

            yiyj10305235

            Free

            Beginner / Computer Architecture, Tech Interview, computer-science

            4.9

            (77)

            2,100+

            $29.70