Hi priya, as you have completed your engineering degree and want to apply for the Indian Administrative Service examinations, so according to my source you can apply for the Indian Administrative Service examinations if you fulfill the eligibility measures by enforced Indian government.

Hear I am providing you the list of eligibility standard that will be helpful for you

The Indian Administrative Service is the premier administrative civil service of the Government of India.

Education Eligibility for IAS Exams
The applicant must have a degree of any of the Universities which is incorporated by the Act of the Central or State Legislature in India.
The candidates who have appeared to appear for the qualifying examination and are waiting for results are also eligible to appear for the Preliminary Examination.
The candidates who have professional and technical qualifications recognized by the Government as equivalent to professional and technical degrees can also apply.
The candidates who have passed their final year examination of MBBS or any Medical Examination but have not completed the internship can also appear for the Main Examination.


Age limit
The candidate must have the age of 21 years and must not have the age of 30 years on 1st August, 2015, means the age of candidate must lie between 21 to 30 years.