(2026 Latest!) Pass the Information Processing Engineer Practical Exam in One Week

Hello! This is Weekend Coding.

You are working very hard to prepare for the exam.

With this round, we have established a new section for mock exams.

I created almost all of the questions myself, but

As there is not much time left before the exam period, some parts were created with the help of an LLM, so the explanations may feel awkward. We ask for your understanding.

I plan to upload an improved version of the materials in the future.

First of all, since there isn't much time left, please solve the initial version of the problems while...

I recommend that you try reviewing various codes.

As I always say, you need to know more about the code than the theory.

I wish you the best of luck on passing.

(Sessions 3–4 are scheduled to be uploaded by the evening of the 16th.)

Hello, this is Weekend Coding.

As the exam approaches, many questions are being posted on the bulletin board.

I am also doing my best to provide answers, and I plan to respond almost in real-time right before the exam.

Having taught more than 5,000 students online,

As someone who has produced successful candidates for the Information Processing Engineer practical exam through offline tutoring as well,

I would like to talk about two different learning methods.

1. Use external materials and code for reference only.

Among the Information Processing Engineer practical exam questions found online, there are many cases where the code does not even run.

In particular, some sites operated in a question bank format may have incorrect code uploaded,

In some cases, even the preprocessor notation is incorrect.

I explain all codes only after directly executing and verifying them myself.

(However, it may differ slightly from the actual exam questions. This is because I also rely on questions reconstructed by students.)

This is because I reconstruct the problems based on those restored by students, while making estimations for any parts that were incorrectly restored.

What I can say for certain is,

It maintains a much higher quality than the irresponsibly posted code found elsewhere,

The point is that there is a guarantee that at least the output values are accurate.

2. Do not trust LLMs like ChatGPT.

For a long time, there have been people pointing out that the answers or explanation methods of ChatGPT or Claude are incorrect.

I am also human, so there may be some typos in the questions.

However, you should never absolutely trust the LLM regarding output values.

The image above shows one of the past exam questions from 2025.

These are the results of entering the input into an online compiler and GPT-5.4 Thinking, respectively.

While the online compiler outputs 3 and 2,

ChatGPT outputs 2 and 3.

LLMs do not execute code directly.

Unless you explicitly request it to "run the code directly to verify," it will not execute the tool.

I have witnessed several instances where LLMs produce incorrect answers for complex recursive functions or unusual data structures.

In the process of creating lectures or answering questions, I have also experienced far too many situations where the LLM provides incorrect answers.

I am an instructor for the Information Processing Engineer practical exam, but I am also someone who develops personally.

In my daily life, I engage in agentic coding, consuming hundreds of millions of tokens using models like Claude Sonnet, Codex, and GLM-5.

Nevertheless, I do not have blind faith in LLMs.

This is because it makes mistakes far too often.

If I am wrong, I would appreciate it if you could verify it yourself and then post your question.

And there is one thing I would like to ask of you.

Never use LLM output as your primary basis for learning.

If you do that, you will get it wrong on the exam.

The Human Resources Development Service of Korea does not use ChatGPT for grading.

Additionally, if the code output varies depending on the compiler version, everyone will be marked as correct.

So don't worry, and you can write your answers with confidence at the testing center.

Surprisingly, there were many cases where everyone was marked as having the correct answer.

I hope you have a happy day today, and I am rooting for everyone to pass!

If you have the time, I would really appreciate it if you could leave a positive course review..^^

👋 Hello, this is Weekend Coding!

Today is the first day of registration for the 2026 1st Information Processing Engineer practical exam.

I understand the hard work of students who try to register while avoiding the heavy traffic that occurs every time.

There are some who are retaking the Information Processing Engineer practical exam,

I believe there are also those who have come to take the class for the first time.

With the mindset of preparing for the first exam of '26 together, and to provide full support for this exam as well,

We are preparing many gift contents.

We plan to present you with theory PDF file v1.0, which features improved readability and more detailed explanations,

(It is finally becoming the version 1 theory material for the main course.)

I am currently preparing to provide even high-difficulty mock exams.

When I created this course, I thought only of the students.

Commercial textbooks that lay out all sorts of unsummarized information and sell them at high prices,

online instructors who set a time limit and restrict your access to videos,

And even those YouTubers who pretend to be experts without having even analyzed the past exam questions.

I wanted to smash them all.

Now, the era of AI has arrived.

I believe that both non-majors and majors alike should be able to pass the Information Processing Engineer certification more easily and affordably.

I will do my best to support you.

You know I usually respond to your questions quickly, right?! 🤗

And lastly,

I would like to ask you for a positive review.

I am also doing my best to improve the lectures, but you may still find some areas that are lacking.

If you provide honest feedback along with a positive course review, I will check many aspects and continue to make improvements.

I am always on the other side of the monitor reading this

I am keeping in mind that there are students like you who find coding difficult and are studying hard to pass the exam.

Have a great day, and

I wish you success! 🙆

Hello! This is Weekend Coding.

To those of you who are studying grammar and code hard again today!

I hope you achieve everything you desire.

I am excited to announce the launch of a new course and am sharing the link along with news of a discount.

Go to Course ⬇︎

https://inf.run/Nq1UX

Since I am an instructor who doesn't usually offer discounts,

If you are one of my students and need help, I believe now is a great opportunity.

The course covers the process of setting up a MacBook (macOS),

It will be a great help to those who want to start development with a MacBook but don't know how to set it up.

Please take a look to see if this course will be helpful for you. 😃

The course will continue to be updated in the future.

There are currently 31 chapters, but

we are planning to upload even more content in the future!

To the students who are studying hard today.

Hello, this is Weekend Coding.

For those who are having difficulty understanding objects and classes in the Java section,

I have renewed the video. (Title: Classes, Constructors, and Objects)

Starting from structures in C,

I have improved the way Java is presented to make it easier to understand.

The total length of the video is about 43 minutes, which is a bit long, but if you listen slowly from the beginning,

I am confident that it will be of great help.

If there are still those who do not understand, I ask that you please take the course one more time.

Thank you.

Sincerely, Weekend Coding.

Lunar New Year has arrived.

Happy New Year! I would like to take a short break from answering questions this week.

I recommend trying to solve past exam questions during the holidays, and

If you happen to be short on time, how about taking a good rest instead and focusing once the holiday is over?

Have a happy holiday..!

Best regards, Weekend Coding.

I don't fear someone who has practiced a thousand different kicks.

However, a person who has practiced one kick a thousand times is fearsome.

- Bruce Lee

- Hello!

I uploaded the restored problems from the Information Processing Engineer practical exam day to YouTube,

I'm Weekend Coding, who strives to analyze past exam questions and explain them in an easy-to-understand way.

It's been almost 2 years since I started teaching only the Information Processing Engineer certification.

I'm working hard to dig deep into just one past exam problem to help more and more non-majors, and to reduce the study load for majors.

This year's third exam is widely evaluated as being relatively easy.

I'm so happy that the implements I emphasized also came out exactly as is.

- 25th Year 3rd Round Past Exam Questions Commentary

This 3rd round of past exam questions came out reasonably well, but there were still many code sections that needed to be covered.

In Java, the enum keyword appeared, and in C language, the static and const keywords were plastered everywhere.

The theory section included Unix commands, software testing processes, and relational algebra.

Past exam questions are being restored for paid courses and learning materials are being prepared.

Videos and learning materials are scheduled to be uploaded by the end of this month (November).

- 2026 Version Course Update

Learning materials for next year are also scheduled to be updated.

Integrate learning materials by language, and for theory, include software testing processes and

I plan to organize the Linux/Unix command set by creating it as a chart.

Finally, if my course was helpful to you, I would appreciate a one-line course review.

Each and every course review you leave gives me great strength and serves as motivation to work even harder.

I always hope for good results for all of you

Have a happy day today too!

In the second session of 2025, C language pointers were included in the exam.

The difficulty continues to increase and more challenging concepts are emerging.

Those who have taken my lectures will never forget the concept of pointer variables in C language and will be able to solve all problems correctly

I uploaded the video with complete revisions.

The existing videos Concept and Application of Pointers and Additional Explanation of Pointers will be removed

The content has been updated to include newly created slides and example problems covering Pointer Concepts and Applications and Pointer Manipulation and Question Patterns, so please take note of this change.

I wish you success in passing.

(+ All my videos are uploaded in 4K resolution at 60 frames per second. Please understand that encoding time may be lengthy on the Inflearn platform.)