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UPSC CDS Mock Test
A timed 25-question mock for the Combined Defence Services Examination covering english grammar, vocabulary & idioms, indian polity, history & geography, physics, percentages, geometry & mensuration. Answer, submit and review every question with its explanation; set negative marking to match your exam’s current scheme.
UPSC CDS mock test
25 questions · 1 mark each · the timer starts with your first answer and the test submits itself when time runs out.
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Q1.English GrammarChoose the correct option: The train ___ by the time we reach the station.
Answer: B — will have left
An action completed before a future point takes the future perfect: “will have left”.
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Q2.Vocabulary & IdiomsChoose the correctly spelt word.
Answer: A — Occurrence
Occurrence: double c, double r, -ence.
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Q3.Indian Polity, History & GeographyThe Panchayati Raj system was given constitutional status by the:
Answer: B — 73rd Amendment
The 73rd Amendment (1992) added Part IX on Panchayats.
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Q4.PhysicsThe unit of electrical resistance is the:
Answer: B — Ohm
Resistance is measured in ohms (Ω).
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Q5.PercentagesWhat is 5% of 600?
Answer: A — 30
5% of 600 = 5/100 × 600 = 30.
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Q6.Geometry & MensurationFind the area of a right triangle with legs 9 cm and 12 cm.
Answer: B — 54 cm²
Area = ½ × base × height = ½ × 9 × 12 = 54 cm².
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Q7.English GrammarChoose the correct tag question: She can swim, ___?
Answer: B — can’t she
A positive statement takes a negative tag with the same auxiliary: “can’t she?”.
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Q8.Vocabulary & IdiomsChoose the synonym of RESILIENT.
Answer: C — Tough
Resilient means able to recover quickly from difficulty.
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Q9.Indian Polity, History & GeographyWhich Article provides for the President’s election by an electoral college?
Answer: C — Article 54
Article 54 describes the electoral college that elects the President.
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Q10.PhysicsFind the kinetic energy of a 8 kg body moving at 14 m/s.
Answer: A — 784 J
KE = ½mv² = ½ × 8 × 14² = 784 J.
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Q11.PercentagesTwo successive discounts of 15% and 5% are equivalent to a single discount of:
Answer: B — 19.25%
Net discount = a + b − ab/100 = 15 + 5 − 15×5/100 = 19.25%.
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Q12.Geometry & MensurationFind the distance between (-4, 5) and (2, 13).
Answer: B — 10
Distance = √((Δx)² + (Δy)²) = √(6² + 8²) = 10.
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Q13.English GrammarIdentify the error: “Each of the students have submitted their assignment.”
Answer: C — have submitted
“Each” is singular, so the verb should be “has submitted”.
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Q14.Vocabulary & IdiomsChoose the antonym of CANDOUR.
Answer: D — Deceit
Candour = openness and honesty; deceit is its opposite.
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Q15.Indian Polity, History & GeographyThe headquarters of the Reserve Bank of India is in:
Answer: D — Mumbai
The RBI has been headquartered in Mumbai since 1937.
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Q16.PhysicsWhich quantity is a vector?
Answer: C — Velocity
Velocity has magnitude and direction.
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Q17.PercentagesThe price of an item changes from ₹800 to ₹640. What is the percentage change?
Answer: C — 20% decrease
Change = -160 on a base of 800: -160/800 × 100 = 20% decrease. Always divide by the ORIGINAL value.
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Q18.Geometry & MensurationFind the distance between (2, -2) and (10, 13).
Answer: B — 17
Distance = √((Δx)² + (Δy)²) = √(8² + 15²) = 17.
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Q19.English GrammarIdentify the error: “One of my friend is a doctor.”
Answer: A — my friend
After “one of” use a plural noun: “one of my friends”.
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Q20.Vocabulary & IdiomsChoose the antonym of OPTIMISTIC.
Answer: B — Pessimistic
Optimistic = expecting good outcomes; pessimistic = expecting the worst.
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Q21.Indian Polity, History & GeographyThe Quit India Movement was launched in:
Answer: D — 1942
It was launched on 8 August 1942.
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Q22.PhysicsA current of 2 A flows through a 20 Ω resistor. What is the potential difference across it?
Answer: A — 40 V
Ohm’s law: V = IR = 2 × 20 = 40 V.
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Q23.PercentagesThe price of an item changes from ₹525 to ₹735. What is the percentage change?
Answer: B — 40% increase
Change = 210 on a base of 525: 210/525 × 100 = 40% increase. Always divide by the ORIGINAL value.
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Q24.Geometry & MensurationFind the distance between (-3, -1) and (3, 7).
Answer: D — 10
Distance = √((Δx)² + (Δy)²) = √(6² + 8²) = 10.
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Q25.English GrammarChoose the correct option: There is no ___ in crying over spilt milk.
Answer: C — use
Fixed expression: “There is no use (in) doing something”.
How the mock test works
- The timer starts with your first answer; the test submits itself when time runs out.
- Choose the negative marking that matches your exam (many Indian exams deduct ¼ or ⅓ of a mark — check the official notification).
- After submitting you get your score, accuracy, time taken and a topic-wise breakdown, then every explanation.
- “New mock test” builds another paper — calculation questions get new numbers.
About UPSC CDS
Combined Defence Services Examination — conducted by Union Public Service Commission (UPSC). Selects officers for the Indian Military Academy, Naval Academy, Air Force Academy and Officers’ Training Academy.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
UPSC CDS practice topics
| Topic | Section | Question source |
|---|---|---|
| English Grammar | English | Question bank |
| Vocabulary & Idioms | English | Question bank |
| Indian Polity, History & Geography | General awareness | Question bank |
| Physics | Science | Calculated + question bank |
| Percentages | Quantitative aptitude | Calculated (new numbers every set) |
| Geometry & Mensuration | Mathematics | Calculated (new numbers every set) |