Hello, here I am providing you the exam pattern of the Bihar Public Service Commission as under:

BPSC entrance exam is covered in three sections:
Preliminary Examination: Covers objective type questions
Main Examination: Subjective type questions
Interview: Personal interview questions

Compulsory subjects
English
General Knowledge
Mathematics

English
Spotting the Errors
Antonyms and Synonyms
Filling in the blanks
Use of prepositions, idioms/phrases
Word analogies
Test of spellings
Re-arranging jumbled up sentences
Comprehension of passage and answering questions based on the passage

General Knowledge
Current events of national and international importance
History of India and Indian National Movement
Indian and World Geography
Indian Polity and Economy
General Mental Ability Questions

Mathematics
Algebra
Linear Algebra
Calculus
Trigonometry
Analytic Geometry
Ordinary Differential Equations
Dynamics, Statics and Hydrostatics
Vector Analysis
Real Analysis
Complex Analysis
Partial differential equations

Optional Subjects (any 2)
Geology
Mathematics
Physics
Mechanical Engineering
Civil Engineering
Economics
Statistics
Agriculture
Zoology
Chemistry