MA Sociology is a 2 years duration course ,
The process of admission to MA Sociology generally starts after your final year/semester examinations are over for Bachelor degree courses.
Different colleges have different criteria and eligibility for giving admissions , like some of the institutes like Jamia Millia Islamia University ,Banaras Hindu University ,Aligarh Muslim University and Ambedkar University conduct an entrance test.
You will get the admission on the basis of your performance in the entrance test , however , Some universities also give weight age to marks scored in graduation for shortlisting of candidates for giving admission.
Hope it helps !