The Indian Civil Services Exam evaluates candidates' knowledge of the Indian economy through a multi-stage screening process.

• The preliminary exam consists of objective-type questions that test a candidate's general awareness of the Indian economy. Questions related to GDP, inflation, and current affairs are included in this section.
• The main exam consists of descriptive questions that evaluate a candidate's understanding of different aspects of the Indian economy, such as the role of agriculture, industry, and service sectors in the Indian economy. Candidates are also tested on their knowledge of government policies, international trade, and economic development.
• The interview stage assesses a candidate's ability to apply theoretical knowledge to practical situations. Candidates must demonstrate their grasp of various economic concepts such as market forces, supply and demand, and price movements. Additionally, candidates are probed on their views regarding economic reforms, fiscal policies, and socio-economic issues affecting the country.

Overall, the Indian civil services exam evaluates candidates on their analytical and critical thinking skills, knowledge of economic principles and policies, and awareness of national and world events in the context of the Indian economy.