UPSC conducted Combined Defense Service Exam (CDS) for recruitment to office cadre of the Army, Navy and Air Force, on 15 February, 2015. The paper was held in three parts - English, General Knowledge and Elementary Mathematics. Each subject was tested in a separate paper and the duration of each of these was 2 hours. All three papers comprised multiple choice questions. The papers on English and General Knowledge had 120 questions each while the paper on Elementary Mathematics had 100 questions.

Topic-wise breakdown of questions is given below:

### English

- Sentence Improvement: 20
- Reading Comprehension: 23 (5 passages)
- Synonyms: 8
- Antonyms: 7
- One Word Substitution: 5
- Para Jumble: 10
- Sentence Jumble: 7
- Error Spotting: 20
- Cloze Test: 20

### General Knowledge

- History: 19
- Science: 27
- Geography: 22
- Ecology: 6
- Polity: 20
- Economy/ Trade: 11
- Others/Armed Forces: 15

### Elementary Mathematics

- Number System: 20
- Simple interest/Compound interest: 5
- Percentage: 2
- Profit/Loss: 1
- Mixture: 1
- Time and Work: 3
- Time speed and Distance: 6
- Clock: 2
- Trigonometry: 14
- Set Theory: 1
- Geometry: 20
- Mensuration: 14
- Algebra: 7
- Statistics: 4