The age limits are different for different posts and are to be confirmed from the Notice of examination published in the Employment News/ Rozgar Samachar.
Generally, the age limits are 18 to 27 years on the crucial date.
The age concession in the upper age limit for SC/STs is 5 years, for OBCs it is 3 years and for physically handicapped candidates it is 10 years.
For widows, divorced women and judicially separated women, the age limit is 35 years for UR category; 40 years for SC/ST women and 38 years for OBC women.
The Notice of examinations may be consulted regarding age relaxations for Ex-servicemen and Central Government Civilian Employee (CGCE) candidates.

Higher Secondary Level
1. Lower Division Clerk Steno Grade ‘C’ & Grade ‘D’
1. Steno Grade D Steno Grade C Graduate Level
1. Assistant, SI in CBI, Inspector (Central Excise Preventive Officer, Examinar), 2. Inspector (of Posts / Income Tax, AEO)/ Divisional Accountant / Auditor / UDC / Junior Accountant/ Tax Assistant Central Police Organisations
1. Sub Inspector Junior Hindi Translator (CSOLS)
1. JHT (CSOLS - Gr. VII) Junior Hindi Translators (for subordinate offices)
1. JHT Junior Engineer (Civil & Electrical)
1. JE

The SSC conducts open examinations regularly for posts for which a large number of vacancies exist, some of these are;

1.  Combined Graduate level [Assistant Grade, Auditors/ Jr.Accountants/ Upper Division Clerks, Divisional Accountants, Inspectors of Income Tax/ Central Excise, and CBI, Section Officer (Commercial) and Section Officer (Audit), Tax Assistant in Income Tax/ Central Excise].
2.  Combined Higher Secondary level [Lower Division Clerks], CPO (Central Police Organisations) examination for recruitment of Sub-Inspectors in CRPF, BSF, CISF, ITBP, SSB, Stenographer Grade 'C', Stenographer Grade 'D' Examination, Junior Engineers (Civil & Mechanical) Examination, Multi Tasking Staff Examination etc.
3.  Direct Interviews/ Skill Tests are held for isolated specialized posts, called Selection Posts, after inviting applications through advertisements, as and when such vacancies are reported to the Commission by various govt. departments/ ministries/ offices.

Yes, provided it is a recognized University/ Institution and he/she possesses the educational qualifications prescribed for the examination and is otherwise eligible.

Women, Scheduled caste, scheduled tribe, physically handicapped and Ex-servicemen candidates are exempted from payment of fees.