Hello,

The Preliminary examination of KAS consists of two papers. 
Paper
I ‐ General Studies (150 marks) 
Paper
II - One subject to be selected from the list of specified
optional subjects (300 marks). 
List of optional
subjects:
- Agriculture
- Animal Husbandry and
Veterinary Science
- Botany
- Chemistry
- Civil
Engineering
- Commerce
- Economics
- Electrical
Engineering
- Geography
- Geology
- Indian History
-
Law
- Mathematics
- Mechanical Engineering
-
Philosophy
- Physics
- Political Science
-
Psychology
- Public Administration
- Sociology
-
Statistics
- Zoology
The mains exam of KAS comprises the following
papers:‐ 

Paper
I - General English (300 marks) 
Paper
II - Essay (150 marks) 
Paper III &
IV - General Studies (300 marks each)
Papers
V, VI, VII & VIII - Any Two Optional Subjects selected
from the list of the specified subjects. 
List of
Optional Subjects:
- Agriculture 
- Animal
Husbandry and Veterinary Science 
- Anthropology 
-
Botany 
- Chemistry 
- Civil Engineering 
-
Commerce and Accountancy 
- Economics 
-
Electrical Engineering 
- Geography 
- Geology 
-
History 
- Law 
- Management 
-
Mathematics 
- Mechanical Engineering 
-
Philosophy 
- Physics 
- Political Science &
International Relations 
- Psychology 
- Public
Administration 
- Sociology 
- Statistics 
-
Zoology 

Thank you !!

Hello,

Kindly refer the below link.It will gives you the complete details about subject and subjectwise marks for KAS prelims and KAS Mains.

http://kasexam.in/kas-exam-pattern-kpsc/

All the Best!!