Channel Talk interviewers will directly analyze the difference between failing and passing answers to the same questions, and help you prepare for actual follow-up questions.
308 learners
Level Basic
Course period Unlimited
Reviews from Early Learners
5.0
Bruce Han
It is limited to MySQL, but many places use MySQL, so I think we can prepare well for it. It’s extremely helpful that you kindly explain why the answer should be given this way and also share practical tips.
5.0
모깅
Compact Database Interview Preparation
5.0
손은눈보다빠르다
My knowledge of databases was fragmented, so I wasn't able to explain things in a logical and organic way. Because of that, I wanted to be able to provide structured explanations for interview questions rather than giving abstract and rough answers. This course is one that can definitely help anyone who has similar concerns as I did. I really liked that it covered not only the main questions for each topic but also the follow-up questions that are likely to be asked next. Furthermore, explaining the flow of the answers helped me understand the concepts that interviewers actually want to hear, rather than just listing simple facts.
A perfect model answer as evaluated by an interviewer
The same question: the decisive difference between a failing answer and a passing answer
Full set of actual interview questions and follow-up question pedigrees for Naver, Kakao, Line, Coupang, Baemin, Danggeun, Toss, and Unicorn companies (over 100 questions)
Answering skills that make you say "I nailed the interview" instead of "I blew the interview"
I'm Jayon, currently working as a backend engineer and interviewer at Channel Talk after completing Woowa Tech Course and working as a backend engineer at several companies. I wasn't someone who was good at interviews from the start either. In fact, I ranked near the bottom in the Woowa Tech Course mock interviews and even had to have a separate meeting with the CEO.
Transaction isolation levels? I knew them. Index operating principles? Of course, I had them organized. But everything changed once I sat down in the interview room.
"Please explain the types of transaction isolation levels." Up to this point, it was fine. I recited everything just as I had prepared. But the moment the interviewer picked out one of my answers and asked, "Then how is Phantom Read resolved in REPEATABLE READ?" my mind went completely blank. I had definitely seen it somewhere. I had even summarized it. But in that moment, sitting right there, I just didn't know what to say.
When I searched on my phone after the interview and realized, "Ah, it was this...", that feeling of emptiness... I'm sure many of you can relate.
From then on, I started recording and reviewing my interviews. I created a "wrong answer note" and compared my previous answers with my current ones for the same questions. As I accumulated hundreds of questions and answers, patterns began to emerge. I started to see which answers convinced the interviewers and which ones invited unnecessary follow-up questions.
It was only after going through this trial and error hundreds of times that I realized: knowing the theory and speaking in an interview are completely different skills. That's why I decided to create a lecture focused solely on "how to answer the questions."
This is not a theoretical summary lecture. Lectures that summarize "What is an index" are already plentiful on blogs. This lecture teaches you, "If an interviewer asks this, answer like this." Each lecture corresponds to one interview question, and we break down step-by-step how you should answer that question.
We provide a comparative analysis of three levels of answers—Bronze, Silver, and Gold—for the same question.Bronze is a 50-point answer out of 100, Silver is an 80-point answer, and Gold is a 100-point answer. We show you specifically why the outcome of passing or failing can differ even when using the same keywords.
The content is based on actual interview questions from major corporations and unicorn startups. It includes not only the main questions but also the follow-up questions that actually follow. From the main question to follow-ups and even follow-ups to follow-ups, the lectures are structured exactly the way questions flow in a real interview.
Frequently asked questions are provided as an appendix PDF and will be continuously updated.Frequently asked questions not covered in the lecture are provided in a separate PDF, and we plan to keep adding more in the future. Once purchased, you can continue to receive all updated appendices.
/builder/d98eae05-6605-467a-9686-6145f8d01330/inflearn_python_04.png?w=960 "inflearn_python_04.png")
Those who can answer the initial question but find their mind going blank when follow-up questions start.
/builder/256f99eb-f417-49ca-ab15-01f5d3867796/inflearn_python_05.png?w=960 "inflearn_python_05.png")
Those who want to know the interviewer's inner thoughts, wondering, "What will they think when they hear this answer?"
/builder/0c686e9a-de9b-4baa-8d27-e33ab1a118f1/inflearn_python_06.png?w=960 "inflearn_python_06.png")
Those who want to be hired by IT service companies like Kakao, Naver, LINE, and Toss
Database basic theory is assumed to be known for this class. The effectiveness of the lecture will be maximized only if you have encountered concepts such as transactions and indexes at least once.
If there are any parts you don't understand while studying, please feel free to ask questions immediately by using the Q&A board😊
If you meet the wrong doctor, you may die because your illness cannot be cured at that moment. However, death ends with the pain of that moment. But if you meet the wrong teacher and receive a poor education, you will suffer throughout your entire life.
Due to poor education, you may end up at a company you never wanted to join, receive a lower salary than expected, and suffer for the rest of your life as a result. Not only that, but the poor education you received can be passed down as a cycle to your own children.
I believe that education can change a person's life very positively, but on the other hand, it can also completely ruin a person's life. That is why I believe education carries such a heavy responsibility.
Therefore, please check who the educator is, what kind of person they are, and what path they have taken, and make a careful judgment.
Hello!
I am Jayon, a 5th-year developer working as a backend engineer at Channel Talk.
I completed the Woowa Tech Course 3rd Backend program and started my career at a small SI company. My salary was at the minimum level. To escape that situation, I spent a tremendous amount of time preparing for coding tests and interviews. As a result, after passing through Chai Corporation (PortOne), I am currently earning several times my initial salary and managing Channel Talk's core systems, which handle billions of records.
I realized through this process that it is truly difficult to find the right direction when preparing for a job alone. That is why I have been active as a backend mentor at F-Lab, JSCODE, and Fast Campus, and also served as a reviewer for the 5th Woowa Tech Course. Through mentoring, I have helped students successfully land jobs at top-tier tech companies (Naver, Kakao, Line, Coupang, Baemin, Danggeun, Toss), unicorns, and major corporations, and the know-how accumulated during that process is fully captured in this lecture.
Just as I received a lot of help when I was going through difficult times, I wanted to become someone who could help many others as well. I felt most proud and happy when the value I created through development had a positive impact on other people.
I also run a technical blog, steady-coding, so if you're curious about what kind of developer I am, please feel free to visit!
Thank you!
➡ CS Interview Preparation directly from a Channel Talk interviewer
Who is this course right for?
Those who want to be hired by IT service companies like Kakao, Naver, LINE, and Toss
Those who want to cram for a database interview in 3 hours right before the interview.
Those who are curious about frequently asked interview questions and the scoring criteria.
Those who want to know the inner thoughts of an interviewer, such as "What would they think if they heard this answer?"
Those who have never done a CS interview before and don't even have a sense of what kind of questions will be asked.
Those who can answer the initial question but find their mind going blank when follow-up questions are asked.
Inflearn Verified
Career Verified
2,430
Learners
148
Reviews
15
Answers
5.0
Rating
5
Courses
[Contact]
[Career]
Present) Channel Corporation - Lv 4. Backend Engineer
Formerly, Chai Corporation (PortOne) - Backend Engineer
[Education]
Current) F-Lab Backend Mentor
Current) JSCODE Backend Mentor
Former) Woowa Tech Course 5th Cohort Backend Reviewer & 3rd Cohort Backend Graduate
Co-instructor
All
54 lectures ∙ (2hr 54min)
Course Materials:
All
30 reviews
4.9
30 reviews
Reviews 112
∙
Average Rating 4.5
5
It is limited to MySQL, but many places use MySQL, so I think we can prepare well for it. It’s extremely helpful that you kindly explain why the answer should be given this way and also share practical tips.
Hello, Bruce Han! Thank you for leaving such a great course review 😊 We’ll continue working to provide even better courses!
Reviews 35
∙
Average Rating 5.0
5
Compact Database Interview Preparation
Hello, Moging! Thank you for leaving such a wonderful review 😊 We’ll continue striving to provide even better courses!
Reviews 7
∙
Average Rating 5.0
5
It was a lecture that helped broaden my knowledge and perspective while studying databases :D
Hello, Junyoung So! Thank you for leaving such a great review😊 I will continue to repay your support with even better lectures in the future!
Reviews 25
∙
Average Rating 5.0
5
My knowledge of databases was fragmented, so I wasn't able to explain things in a logical and organic way. Because of that, I wanted to be able to provide structured explanations for interview questions rather than giving abstract and rough answers. This course is one that can definitely help anyone who has similar concerns as I did. I really liked that it covered not only the main questions for each topic but also the follow-up questions that are likely to be asked next. Furthermore, explaining the flow of the answers helped me understand the concepts that interviewers actually want to hear, rather than just listing simple facts.
Hello, bigho98! Thank you for completing the course and leaving such a long and wonderful review😊 It makes me feel proud to see that you studied well, even down to the follow-up questions, just as I intended. I truly hope you achieve the goals you're aiming for!!
Reviews 2
∙
Average Rating 5.0
5
I watched this to prepare for CS interviews, and it was great because I learned about various keywords and what else I need to study further.
Hello, Robo! Thank you for leaving such a great review😊 I will strive to repay your support with even better lectures in the future!
Check out other courses by the instructor!
Explore other courses in the same field!
25% off for new members
$41.70
25%
$51.70
.png?w=420)
![[The concept is easy~, the practice is intense] SQL data analysis, utilization!Course Thumbnail](https://cdn.inflearn.com/public/courses/328743/cover/59aa0ed0-cf2f-4cdc-b508-6cf8d652c563/328743-eng-original.png?w=420)
![Smart SQL Learning Methods in the AI Era [Introductory]Course Thumbnail](https://cdn.inflearn.com/public/files/courses/336379/cover/01k163anqmn6qkaarv95ge5tts?w=420)
![[MMORPG Game Development Series with C# and Unity] Part 5: DatabaseCourse Thumbnail](https://cdn.inflearn.com/public/courses/325283/course_cover/afb413e6-681e-47cd-808a-099c79fed112/rookiss-rpg-5.jpg?w=420)
