As you want to know about Combined Defence Services Examination, here I will get details for you.

Eligibility
Nationality: A candidates must either be:
(i) a Citizen of India, or
(ii) a subject of Bhutan, or
(iii) a subject of Nepal, or
(iv) a Tibetan refugee

Education
i) For Indian Military Academy / Officers’ Training Academy: Degree from a recognized university or equivalent

ii) For Indian Naval Academy: Bachelor of Engineering

iii) For Air Force Academy: Degree of a recognized University with Physics and Mathematics at 10+2 level or Bachelor of Engineering

Graduates with first choice as Army/Navy/Air Force are to submit proof of graduation provisional certificate on the date of commencement of the SSB interview at the SSB

For CDS exam, applicants can be from any stream but for entry to Air Force and Navy, candidates should have studied physics and maths up to Class 12

FEE DETAILS
Application Fee: Candidates (excepting Female /SC/ST candidates who are exempted from payment of fee) are required to pay a fee of Rs.200/- (Rupees two hundred only) either by depositing the money in any Branch of SBI by Cash, State Bank of Bikaner and Jaipur/State bank of Hyderabad/State Bank of Mysore/State Bank of Patiala/State Bank of Travancore or by using Visa/Master Credit/Debit Card

No fee exemption is, however, available to OBC candidates and they are required to pay the full prescribed fee

Exam pattern
1. Written Exam:
i. Written Exam consists of Objective Type questions and time duration 2hrs and maximum marks is 100 for each subject.

ii. For the candidates who are appearing for Indian Military Academy, Naval Academy, Air force Academy written test comprising of English, General Knowledge and Elementary mathematics subjects and for candidates who are appearing for officers training academy the written test comprising of English and General Knowledge.

iii. Candidates who are declared successful in the written exam will be detailed for intelligence and personality test at the Service Selection Board based on their preference, by the respective service HQ.

(A) For Admission to Indian Military Academy, Indian Naval Academy and Air Force Academy:
Subject Duration Maximum Marks
English 2 Hours 100
General Knowledge 2 Hours 100
Elementary Mathematics 2 Hours 100

(B) For Admission to Officers’ Training Academy:
Subject Duration Maximum Marks
English 2 Hours 100
General Knowledge 2 Hours 100

The maximum marks allotted to the written examination and to the interviews will be equal for each course. i.e the maximum marks allotted to the written examination and to the interviews will be 300, 300, 300 and 200 each for admission to the Indian Military Academy, Indian Naval Academy, Air Force Academy and Officers Training Academy respectively.

2. Interview/ Personality Test:
The candidates who are selected in written test are called for interview.

The SSB procedure consists of two stage selection process-Stage I and Stage II.

Only those candidates who clear the stage I are permitted to appear for Stage II.