OAS Mains-2017
1. English Essay
2. General Studies Paper-I
3. General Studies Paper-II
4. History Paper-I
5. History Paper-II
6. Geography Paper-I
7. Geography Paper-II

OAS Mains-2016
1. MIL Odia
2. MIL English
3. English Essay
4. General Studies Paper-I
5. General Studies Paper-II
6. History Paper-I
7. History Paper-II
8. Geography Paper-I
9. Geography Paper-II
10. Economics Paper-I
11. Economics Paper-II
12. Public Administration Paper-I
13. Public Administration Paper-II
14. Sociology Paper-I
15. Sociology Paper-II

OAS Mains-2015
1. MIL Odia
2. MIL English
3. English Essay
4. General Studies Paper-I
5. General Studies Paper-II
6. History Paper-I
7. History Paper-II
8. Geography Paper-I
9. Geography Paper-II
10. Economics Paper-I
11. Economics Paper-II
12. Public Administration Paper-I
13. Public Administration Paper-II
14. Sociology Paper-I
15. Sociology Paper-II

OAS Mains-2011
1. General Studies Paper-I
2. General Studies Paper-II
3. English Essay
4. History Paper-I
5. History Paper-II
6. Geography Paper-I
7. Geography Paper-II
8. MIL Odia
9. MIL English

OAS Mains-2006 (Held in 2008)
1. General Studies-I
2. General Studies-II
3. English Essay
4. History Paper-I
5. History Paper-II
6. GeographyPaper-I
7. Geography Paper-II

OAS Mains-2006 (Held in 2009)
1. General Studies Paper-I
2. General Studies Paper-II
3. English Essay
4. History Paper-I
5. History Paper-II
6. Geography Paper-I
7. Geography Paper-II