Dear Aspirant,

The Indian Administrative Service (IAS) is the All India administrative civil service. IAS officers hold key and strategic positions in the Union Government, States governments and public-sector undertakings.Like in various countries (for example UK) following a Parliamentary system, IAS as the permanent bureaucracy in India forms an inseparable part of the executive branch of the Government of India, thus providing continuity and neutrality to the administration.

Along with the Indian Police Service and Indian Forest Service, the IAS is one of the three All India Services — its cadre can be employed by both the Union Government and the individual States.

Upon confirming to service after probation as Sub-Divisional Magistrate, an IAS officer is given administrative command of entire district administration in the district as District collector after four years of service. On attaining the upper levels of Super Time Scale to Apex Scale, they can go on to head whole departments and subsequently entire Ministries of Governments of India and its states.

And you are not required to score 90% in your 12th to get appear for IAS.

Hope this helps. Thank you.