Tell me the powers of ias and ips respectively...also the orders for they have to take permission from others respectively

IAS officer is responsible for maintenance of law and order, revenue administration and general administration in the area under his/her work.

Powers and Responsibilities of an IAS Officer:

The functions and responsibilities of IAS officers change at various points of their career
In the beginning of the career, an IAS Officer joins the state administration at the sub-divisional level and as a sub-divisional magistrate looks after general administration and development work as well as law and order in the areas under his/her control.
The post of the District Officer variously known as District Magistrate, district Collector or Deputy Commissioner is the most esteemed and distinguishable post held by the members of the service.
At the district level, IAS officers are mainly delegated with district affairs, including implementation of developmental schemes.
During the normal course of their career, the officers also oblige in the State Secretariat or as Head of Departments or in Public Sector Undertakings.
To take care of daily affairs of the government including forming and implementing of policy after consulting the minister of the concerned ministry
Supervision of the implemented policies, Travelling to places where the policies are being implemented, Responsible for personal supervision for the expenditure of public funds on the implementation of policies.

IPS Officer:

IPS Officer Deals with Law and Order. They look after the peace and justice in the locality given to them.

The Power & Responsibilities of IPS Officer:

Leading and commanding the civil and armed police forces in all the states and union territories.
Leading and commanding the Central Police Organizations like Intelligence Bureau, Central Bureau of Investigation, Border Security Force, Central Reserve Police Force, Indo-Tibetan Border Police, National Security Guard, Vigilance Organizations etc.

Good Luck!