Hey Harshit as you need the cds exam syllabus and wants to know for the eligibility criteria so here I am providing info on this…….

CDS Exam Syllabus
English
Antonyms
Synonyms
Spotting Errors
Ordering of words in a sentence
Clozed test
Reading Comprehension
Fill in the blanks
Sentence Correction
Finding errors and omittions
Miscellaneous

General Knowledge
Knowledge of current topics
knowledge of History of India and Geographical issues
Indian Economy
Current happening in the field of business, politics, sports, entertainment etc.
Monuments of India
Books and Authors name
Miscellaneous

General Science
Physics
Biology
Chemistry

Elementary Mathematics
Arithmetic
Algebra
Trigonometry
Statistics
Area and Perimeter
Volume and Surface area
Height and Distances
Circle
Triangles
Quadrilateral and Polygon
Number System
HCF and LCM
Decimal Fractions
Work and Time
Average
Profit and Loss
Ratio and Proportion
Logarithms
Set Theory
Percentage
Simple and Compound interest
Powers and Roots
Time and Distance
Basic Operations and factorisation

Eligibility Criteria
Age
For IMA: 19 years to 24 years.
For Naval Academy: 19 years to 22 years.
For Air Force Academy: 19 years to 23 years.
For Officers Training Academy: 19 years to 25 years

Qualification
Candidates who are applying for IMA they must have any degree from any recognized university.
Applicants who are applying for Indian Naval Academy should have a bachelor’s degree in Engineering from any recognized university.
And Candidatesapplying for Air Force Academy must have a degree in engineering from any recognized university