However, I can suggest some sample questions for a test on Nitin Singhania's book "Indian Economy" that could help evaluate a candidate's understanding of the subject matter. Here are some examples:

1. What is the difference between economic growth and economic development? Discuss the various indicators used to measure economic development in India.
2. Explain the concept of inflation and its impact on the Indian economy. Discuss the various measures taken by the government to control inflation.
3. What is the role of the Reserve Bank of India (RBI) in the Indian economy? Discuss its functions and responsibilities.
4. Discuss the impact of globalization on the Indian economy. What are the advantages and disadvantages of globalization for the Indian economy?
5. What are the various sectors of the Indian economy? Discuss their contribution to the GDP and employment generation.

Here are some famous books for UPSC Exam that candidates can refer to for their preparation:

1. India's Struggle for Independence by Bipan Chandra.
2. Indian Polity by M. Laxmikanth.
3. Indian Economy by Ramesh Singh.
4. Geography of India by Majid Husain.
5. A Brief History of Modern India by Rajiv Ahir.
6. Environment by Shankar IAS.
7. Ethics, Integrity and Aptitude by G. Subba Rao and P.N. Roy Chowdhury.
8. History of Medieval India by Satish Chandra.
9. International Relations by Pavneet Singh.
10. Science and Technology by Ashok Singh.