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Explore More South Korea Information Processing National Technical Qualifications (정보처리기사·산업기사 — HRD Korea / Q-Net)

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Engineer Information Processing (정보처리기사, South Korea)

Practice Questions
Exam Review

Key Facts: Industrial Engineer Information Processing Exam

60 items

Official written paper length (3 subjects × 20)

Q-Net Industrial Engineer grading standard (jmCd: 0260)

90 minutes

Written CBT duration (30 minutes per subject)

Q-Net 필기시험 접수안내

40 / 60

Written per-subject floor and overall passing average

Q-Net 검정기준 및 방법 (산업기사)

KRW 19,400

Written CBT registration fee on Q-Net (checked 2026)

Q-Net crf005 jmCd=0260

KRW 20,800

Practical examination fee on Q-Net (checked 2026)

Q-Net crf005 jmCd=0260

2 years

Written-pass exemption period from pass date

National Technical Qualifications Act Enforcement Decree Article 21

정보처리산업기사 is HRD Korea's Industrial Engineer qualification in software and IT systems under MSIT. The 2026 written CBT consists of 60 items across three subjects (20 items each, 90 minutes total) with a 40-point per-subject floor and a 60-point overall average pass threshold, followed by a 2-hour written-answer practical exam in 정보처리 실무. Official fees on Q-Net are KRW 19,400 written and KRW 20,800 practical. OpenExamPrep offers independent English-language MCQ study practice for written topics, not an official translation or practical examination simulation.

Sample Industrial Engineer Information Processing Practice Questions

Try these sample questions to review concepts for the Industrial Engineer Information Processing exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which operating system process state transition occurs when a running process issues a system call to perform an I/O operation and must wait for hardware completion?
A.Running to Ready
B.Running to Blocked (Waiting)
C.Blocked to Running
D.Ready to Terminated
Explanation: When an active process issues a blocking I/O request or waits for an external event, it cannot utilize the CPU and transitions from Running to Blocked (대기/보류). Once the I/O operation completes, an interrupt moves the process from Blocked to the Ready queue.
2In operating system CPU scheduling, what scheduling policy does Round Robin (RR) approximate if the assigned time quantum (time slice) is set to an excessively large value?
A.First-Come, First-Served (FCFS)
B.Shortest Job First (SJF)
C.Priority Scheduling
D.Shortest Remaining Time First (SRTF)
Explanation: If the Round Robin time slice is larger than the longest CPU burst of any process in the queue, each process runs to completion before preemption can occur. Consequently, the scheduling order degenerates into First-Come, First-Served (FCFS / 선착순 처리).
3Three processes P1 (burst time 8 ms), P2 (burst time 4 ms), and P3 (burst time 2 ms) arrive simultaneously at time 0. What is the average waiting time under non-preemptive Shortest Job First (SJF) scheduling?
A.2.00 ms
B.4.67 ms
C.2.67 ms
D.8.00 ms
Explanation: Under non-preemptive SJF, jobs execute in ascending order of CPU burst length: P3 (2 ms), then P2 (4 ms), then P1 (8 ms). The waiting times are 0 ms for P3, 2 ms for P2, and 2 + 4 = 6 ms for P1. The average waiting time is (0 + 2 + 6) / 3 = 8 / 3 ≈ 2.67 ms.
4Which of the four necessary conditions for deadlock (교착상태) is characterized by a process holding at least one allocated resource while simultaneously requesting additional resources held by other processes?
A.Mutual Exclusion (상호 배제)
B.No Preemption (비선점)
C.Circular Wait (환형 대기)
D.Hold and Wait (점유와 대기)
Explanation: Hold and Wait (점유와 대기) occurs when a process currently possesses allocated system resources while awaiting the release of additional resources currently locked by others. Eliminating this condition requires processes to request all needed resources simultaneously at startup.
5What is the primary operational mechanism and classification of Dijkstra's Banker's Algorithm (은행원 알고리즘) in operating system deadlock management?
A.Deadlock detection and dynamic process termination
B.Deadlock avoidance by granting requests only if the system remains in a safe state
C.Deadlock prevention by strictly denying mutual exclusion on non-shareable devices
D.Deadlock recovery through selective transaction checkpoint rollback
Explanation: The Banker's Algorithm is a classic deadlock avoidance (교착상태 회피) technique that models maximum resource claims. It evaluates each resource allocation request dynamically, granting it only if there exists a safe sequence where all processes can finish without entering an unsafe state.
6Which type of memory fragmentation is inherent to paging systems where memory is allocated in fixed-size blocks (pages and frames) and the process does not completely occupy its final page?
A.Internal fragmentation (내부 단편화)
B.External fragmentation (외부 단편화)
C.Dynamic segment overlap
D.Swapping fragmentation
Explanation: In paging, physical memory is partitioned into fixed-size frames (e.g., 4 KB). When a process's memory footprint is not an exact multiple of the page size, unused memory remains inside the allocated final frame, creating internal fragmentation (내부 단편화).
7Given 3 initially empty physical page frames and the page reference string '1, 2, 3, 2, 1, 4', how many total page faults occur under the Least Recently Used (LRU) replacement policy?
A.3 page faults
B.6 page faults
C.4 page faults
D.5 page faults
Explanation: Frames load: 1 (fault 1: [1]), 2 (fault 2: [1,2]), 3 (fault 3: [1,2,3]). Reference 2 is a hit (recency: 1, 3, 2). Reference 1 is a hit (recency: 3, 2, 1). Reference 4 causes a fault: page 3 is the least recently used, so 4 replaces 3 (fault 4: [4,2,1]). Total page faults = 4.
8Belady's Anomaly (벨레이디의 모순) is a phenomenon where increasing the number of physical page frames results in an increased number of page faults. Which page replacement algorithm exhibits this anomaly?
A.Optimal Replacement (OPT)
B.Least Recently Used (LRU)
C.Least Frequently Used (LFU)
D.First-In, First-Out (FIFO)
Explanation: First-In, First-Out (FIFO) page replacement suffers from Belady's Anomaly because it does not satisfy the stack property. Stack algorithms such as LRU and OPT guarantee that the set of pages in an n-frame system is always a subset of the pages in an (n+1)-frame system, preventing this anomaly.
9Which memory access behavior specifically demonstrates spatial locality (공간 구역성) in computer programs?
A.Sequentially accessing elements of a contiguous array stored in linear memory
B.Repeatedly executing instructions inside a small loop over a brief duration
C.Accessing global variables declared across widely separated modules
D.Randomly accessing nodes in a distributed linked list structure
Explanation: Spatial locality (공간 구역성) is the tendency of a program to access memory addresses physically adjacent to recently accessed locations, as seen in linear array processing. In contrast, temporal locality (시간 구역성) refers to re-accessing the same memory addresses repeatedly within short intervals, such as loop variables.
10In a Linux or Unix operating environment, which octal numerical permission string represents the symbolic permission set '-rwxr-xr--'?
A.751
B.754
C.644
D.744
Explanation: File permissions are broken into owner (rwx = 4+2+1 = 7), group (r-x = 4+0+1 = 5), and others (r-- = 4+0+0 = 4). Combining these three octal digits gives '754'.

About the Industrial Engineer Information Processing Exam

Industrial Engineer Information Processing (정보처리산업기사) is South Korea's intermediate-level national technical qualification in software and IT systems engineering, administered by HRD Korea under the Ministry of Science and ICT (MSIT). The written examination tests candidate knowledge across three core subjects: Information Systems Infrastructure (operating systems, networking, security), Programming Language Utilization (C, Java, Python, data structures, algorithms), and Database Utilization (relational data models, SQL queries, normalization). Upon passing the written CBT, candidates sit for a 2-hour written-answer practical examination in 정보처리 실무. This study bank provides 100 independent English-language multiple-choice questions designed to reinforce core technical concepts, programming comprehension, and database design skills for exam candidates.

Exam sponsor: HRD Korea (Q-Net) / Ministry of Science and ICT. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

The official written examination consists of three 20-item subjects administered together in a 90-minute CBT session: Information Systems Infrastructure (정보시스템 기반 기술), Programming Language Utilization (프로그래밍 언어 활용), and Database Utilization (데이터베이스 활용). A minimum of 40 points per subject and an overall average of 60 points are required to pass. A 2-hour written-answer practical examination in 정보처리 실무 follows.

Time Limit

90 minutes written; 2 hours practical

Passing Score

Written: 40+ per subject floor and 60 average; practical: 60/100

Exam / Certification Fees

KRW 19,400 written / KRW 20,800 practical (Q-Net, 2026)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

33%

Information Systems Infrastructure (정보시스템 기반 기술)

Operating system concepts, memory management, Linux/Unix shell utilities, OSI 7 layer and TCP/IP networking, routing, switching, and cybersecurity fundamentals.

34%

Programming Language Utilization (프로그래밍 언어 활용)

Programming syntax, control structures, pointer mechanics, array operations, object-oriented concepts in Java, and scripting logic in Python with code output analysis.

33%

Database Utilization (데이터베이스 활용)

Relational data modeling, SQL queries (SELECT, JOIN, aggregation, subqueries), DDL/DML/DCL commands, transaction isolation and ACID rules, and schema normalization.

Preparing for the Industrial Engineer Information Processing Exam

What You Need to Know

  • Passing score: Written: 40+ per subject floor and 60 average; practical: 60/100
  • Assessment: The official written examination consists of three 20-item subjects administered together in a 90-minute CBT session: Information Systems Infrastructure (정보시스템 기반 기술), Programming Language Utilization (프로그래밍 언어 활용), and Database Utilization (데이터베이스 활용). A minimum of 40 points per subject and an overall average of 60 points are required to pass. A 2-hour written-answer practical examination in 정보처리 실무 follows.
  • Time limit: 90 minutes written; 2 hours practical
  • Exam / certification fees: KRW 19,400 written / KRW 20,800 practical (Q-Net, 2026) Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Industrial Engineer Information Processing: Suggested Study Strategy

1Ensure balanced study across all three subjects to avoid failing the 40-point minimum subject threshold (과락).
2Trace code step-by-step for C pointers, Java inheritance, and Python list/dictionary manipulations, tracking variable states manually.
3Practice writing and analyzing SQL queries with JOINs, GROUP BY, HAVING, and subqueries, along with normalization steps from 1NF to BCNF.
4Master core Linux terminal commands (chmod, grep, ps, kill, find) and TCP/IP protocol stack details, including subnetting and port numbers.

Frequently Asked Questions

What is Industrial Engineer Information Processing (정보처리산업기사)?

It is an intermediate-level National Technical Qualification (국가기술자격 산업기사) in software and computing infrastructure administered by HRD Korea (Q-Net jmCd: 0260) under the Ministry of Science and ICT (MSIT). It validates core competencies in software development, systems infrastructure, and database operations.

How is the official examination structured in 2026?

The written examination is a 60-question computer-based test (CBT) covering three subjects: Information Systems Infrastructure (20 items), Programming Language Utilization (20 items), and Database Utilization (20 items). Candidates have 90 minutes (30 minutes per subject). Passing requires at least 40 points in each subject (과락 40점 미만 방지) and an overall average of 60 points or higher. Passers advance to a 2-hour written-answer practical examination (필답형 실기) in 정보처리 실무 (60/100 points to pass).

What are the official examination fees in 2026?

According to the official Q-Net exam page (jmCd: 0260, checked 2026), the written CBT examination fee is KRW 19,400, and the practical examination fee is KRW 20,800.

How long is a passing written CBT score valid?

Under Article 21 of the Enforcement Decree of the National Technical Qualifications Act, a candidate who passes the written examination is exempt from the written paper for two years from the pass announcement date, allowing multiple attempts at the practical examination.

What language is the official examination, and how does this practice bank relate to it?

The official Q-Net examination is administered in Korean. This question bank is an independent English-language MCQ study adaptation created by OpenExamPrep to assist English-speaking students and bilingual engineers in mastering core syllabus topics. It is not an official translation or CBT simulation, and it does not replace the practical subjective exam.