CSAT Practice Test 2026

About the CSAT exam

The College Scholastic Ability Test (Suneung) (CSAT) is a university entrance examination administered in South Korea. It is designed to assess candidates' knowledge and proficiency across 5 key subject areas including Korean Language, Mathematics, English, Korean History. This exam is widely recognized as an essential benchmark for students and professionals.

Use short CSAT practice sets to identify topics to revisit. Choose a subject and difficulty, answer questions, then review the explanations. New accounts get 30 question credits; further new questions use paid credits. Retaking previously seen questions is free.

Whether you're a first-time candidate or retaking the CSAT to improve your score, InfinityMock helps you identify your strengths and weaknesses through detailed performance analytics. Our platform covers Korean Language, Mathematics, English, Korean History, Subordinate Subjects, with questions available at Easy, Medium, and Hard difficulty levels. Track your progress, review detailed explanations, and build the confidence you need to pass on exam day.

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8 free CSAT practice questions (2026)

Answer these first — no signup, no card. Every answer is explained. For more practice, sign up for 30 free question credits and choose a subject above.

1. According to Quine's holistic epistemology (Duhem-Quine thesis), why can a single scientific hypothesis not be tested and falsified in isolation?

   • Because empirical observation is completely subjective and cannot be verified by scientific instruments.
   • Because logical truths are inherently independent of any empirical experiences and do not require testing.
   • Because a hypothesis is always tested as part of a whole network of interrelated beliefs and auxiliary assumptions.
   • Because scientific hypotheses are merely mathematical conventions that do not describe physical reality.
   Show answer & explanation

   Answer: C. Because a hypothesis is always tested as part of a whole network of interrelated beliefs and auxiliary assumptions.

   Quine argued that our beliefs face the tribunal of experience not individually but as a whole corporate body. When an experiment fails, it indicates an error somewhere in the system (including auxiliary assumptions), not necessarily in the specific hypothesis being tested.

   Topic: Korean Language · hard

2. In the context of the Bretton Woods monetary system, which of the following best describes the core conflict of the 'Triffin Dilemma'?

   • The US had to maintain a balance of payments deficit to provide global liquidity, which inevitably weakened foreign confidence in the dollar's convertibility to gold.
   • Raising domestic interest rates to curb inflation lowered the global exchange value of the US dollar.
   • Devaluing European currencies made American exports too expensive, leading to structural trade surpluses for developing nations.
   • The introduction of a new global reserve currency directly clashed with the gold standard's fixed parity rules.
   Show answer & explanation

   Answer: A. The US had to maintain a balance of payments deficit to provide global liquidity, which inevitably weakened foreign confidence in the dollar's convertibility to gold.

   The Triffin Dilemma points out that the reserve currency country (the US) must run trade deficits to supply the world with currency, but persistent deficits erode confidence in the reserve currency's backing (gold), leading to the instability of the system.

   Topic: Korean Language · hard

3. During the polymerase chain reaction (PCR) process, why is the reaction temperature lowered to approximately 50°C–65°C during the second step (annealing)?

   • To allow Taq polymerase to synthesize the new complementary DNA strands.
   • To break the hydrogen bonds holding the double-stranded DNA template together.
   • To allow primers to bind specifically to their complementary target sequences on the single-stranded DNA.
   • To denature any active nucleases that could degrade the target DNA sample.
   Show answer & explanation

   Answer: C. To allow primers to bind specifically to their complementary target sequences on the single-stranded DNA.

   The annealing step requires lowering the temperature to allow the short DNA primers to hydrogen-bond (anneal) specifically to their complementary target sequences on the single-stranded DNA template.

   Topic: Korean Language · medium

4. In Korean civil law, how is 'indirect possession' (간접점유) established?

   • When a person exercises physical control over an object without any underlying legal right.
   • When a person holds legal ownership but has transferred actual physical possession to another party through a legal relationship like a lease.
   • When a person has lost both physical control and legal claim over a property due to theft.
   • When multiple individuals hold joint ownership of a property without physical division.
   Show answer & explanation

   Answer: B. When a person holds legal ownership but has transferred actual physical possession to another party through a legal relationship like a lease.

   Indirect possession is established when a person (such as a landlord) possesses a property through another person (the tenant/direct possessor) based on a legal relationship (possession-mediating relationship).

   Topic: Korean Language · hard

5. How does a Time-of-Flight (ToF) LiDAR sensor determine the distance to a target object?

   • By measuring the phase shift of the continuous-wave light reflected from the object.
   • By measuring the time elapsed between emitting a laser pulse and receiving its reflected signal.
   • By calculating the angle of refraction as the laser light passes through different atmospheric layers.
   • By analyzing the changes in the wavelength of the emitted light due to the Doppler effect.
   Show answer & explanation

   Answer: B. By measuring the time elapsed between emitting a laser pulse and receiving its reflected signal.

   ToF LiDAR calculates distance by multiplying the speed of light by half of the total travel time (round trip) of the emitted laser pulse.

   Topic: Korean Language · medium

6. In the Chosun Neo-Confucian debate between Yi Hwang (Toegye) and Yi I (Yulgok), which statement accurately represents Yi I's perspective on 'Li' (이) and 'Qi' (기)?

   • Li and Qi are completely separate entities that manifest independently in human emotion.
   • Li is formless and inactive, acting as the ultimate principle, while Qi is the active, material element that manifests form.
   • Li is an active force that has the power to emit itself, while Qi is merely passive.
   • Qi is the sole reality, and Li is merely a subjective mental construct with no objective ontological basis.
   Show answer & explanation

   Answer: B. Li is formless and inactive, acting as the ultimate principle, while Qi is the active, material element that manifests form.

   Yi I emphasized that 'Li is formless and Qi has form' (이가무형 기가유형). He argued that only Qi has the power to act (발), while Li is the non-acting principle that rides on Qi.

   Topic: Korean Language · hard

7. In Yoon Dong-ju's poem 'Self-Portrait' (자가상), what emotional transformation does the speaker undergo as he gazes into the well?

   • From self-pity and hatred to reconciliation and self-reflection.
   • From pride and arrogance to despair and resignation.
   • From absolute isolation to communal joy and social action.
   • From grief over a lost lover to a cold-hearted acceptance of destiny.
   Show answer & explanation

   Answer: A. From self-pity and hatred to reconciliation and self-reflection.

   In 'Self-Portrait', the well acts as a mirror. The speaker cycles through hating his reflected self, pitying himself, and eventually reaching a state of reconciliation and deep self-examination.

   Topic: Korean Language · medium

8. In Jeong Cheol's classical Gasa 'Samiingok' (사미인곡), what is the primary symbolic function of sending the 'fragrant wind' or 'spring breeze' to the lord?

   • It represents the speaker's desire to comfort the lord and express unchanging loyalty and devotion.
   • It symbolizes the speaker's anger toward corrupt political factions at court.
   • It serves as an omen warning the lord of an impending military invasion.
   • It represents the passage of time and the speaker's despair over physical aging.
   Show answer & explanation

   Answer: A. It represents the speaker's desire to comfort the lord and express unchanging loyalty and devotion.

   In 'Samiingok', the speaker (metaphorically a woman separated from her lover, representing a courtier exiled from the king) sends natural objects like plum blossoms or spring breezes to convey unchanged loyalty and affection.

   Topic: Korean Language · medium

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CSAT Exam Subjects

Available practice subjects: Korean Language, Mathematics, English, Korean History, Subordinate Subjects. Select a subject for focused preparation. Coverage is not a guarantee of the complete official syllabus.

📖 CSAT Study Guide

Read our comprehensive How to Pass the CSAT in 2026 — Complete Study Guide for expert preparation tips, study plans, and strategies.

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