UPSC CDS - About, age, vacancy, salary, Eligible ?

Combined Defence Services is an exam conducted by UPSC (Union Public Service Commission i.e. a Central’s recruiting and examination agency which employs candidates for All India Services which includes IAS, IRS, IDAS, IFS, IPS, SCRA, NDA, IAAS, CDS, etc. But here for CDS, UPSC conducts examination twice every year: February & November. The examination is held mainly for the recruitment into Air Force, Navy, and Indian Army and Officers Training Academy. Unmarried Candidates, divorcees are allowed to appear for the exam and the chosen candidates will be selected in the interested Armed Forces through Interviews held by SSB (State Service Board which conducts personality and Intelligence test along with Interview to find the suitable candidate for the Armed Forces through group activities, screening tests, psychological tests and more. The Minimum Qualification is 10+2 from a recognised University with Physics + Mathematics or Degree in Engineering for Navy & Air force but for Army & Officers Training Academy one must have a degree from a recognised college.
AGE LIMIT :Lower age limit is  19 and the Upper age limit is 25 years.
TOTAL VACANCIES :414
STARTING SALARY : Approximately  15000 plus Allowances with the other benefits like House and Car,etc.
ELIGIBLITY CRITERIA: