my aim is to become a civil service administor?means which subject i want to take? please guide my career?

Hi Basavaraj

In India, the Civil Service is defined as "appointive positions by the Government in connection with the affairs of the Union and includes a civilian in a Defence Service, except positions in the Indian Armed Forces." The members of civil service serve at the pleasure of the President of India and Article 311 of the constitution protects them from politically motivated or vindictive action.

The Civil Services of India can be classified into three types - the All India Services, the Central Civil Services (Group A and B) and State/Provincial Civil Services. The recruits are university graduates (or above) selected through a rigorous system of examinations, called the Civil Services Examination (CSE) and its technical counterpart known as the Engineering Services Examination (ESE) both conducted by the Union Public Service Commission (UPSC). The entry into the State Civil Services is through a competitive examination conducted by every state public service commission.

Step 1: Obtain a Bachelor Degree

After higher secondary, candidates who wish to become IAS officer are required to obtain graduation in any discipline from a UGC recognized university. Bachelor degree is the minimum qualification required to apply for the civil service exam. There is no minimum percentage required to be eligible to this exam. Final year candidates are also eligible to apply for this exam.

Qualify the Civil Service Exam

The all India combined competitive examination for Civil Service comprises of two stages. They are

Preliminary Examination
Main Examination
Preliminary examination is usually conducted in the month of May/ June every year. This exam will be in objective type format. The exam consists of two papers, general studies and an optional subject. There will be questions for 150 marks from general section and 300 marks from optional subject. Candidates can choose their optional subject from the list given below.

Agriculture
Animal Husbandry and Veterinary Science
Botany
Chemistry
Civil Engineering
Commerce
Economics
Geography
Geology
Indian History
Law
Mathematics
Mechanical Engineering
Medical Science
Philosophy
Physics
Political Science
Psychology
Public Administration
Electrical Engineering
Sociology
Statistics
Zoology
The medium of instructions will be in English and in Hindi. Candidates can expect questions in the optional paper from the degree level syllabus. Time limit of each paper is two hours. Candidates who have cleared the preliminary examination are eligible for the main exam.

Clear the Main Examination

Main examination is of descriptive type. It consists of nine papers. Time duration for each paper is three hours. It comprises of the following papers.

One Indian Language for 300 marks
English for 300 marks
General Essay for 300 marks
General Studies of 300 marks
Any two optional papers for 300 marks each
Personal Interview
The final selection for Indian Administrative Service is carried out on the basis of personal interview. Usually the final interview is conducted in the month of April/ May every year. Candidates can expect questions on matters of general interest. The questions are designed to measure the suitability as well as the mental caliber of the candidates. Apart from this candidates will have to go for a medical test as part of selection procedure. Once selected, all candidates are required to undergo compulsory foundation training.

there are free coaching, books available online. I am sharing you few

https://www.quora.com/How-should-I-start-my-preparation-for-the-IAS-exam
http://www.civilserviceindia.com/subject/strategy.html

ALL THE BEST !!!!!!!!