Delhi University (DU)

Yes, you can do coaching to prepare for the DU entrance examination to get into your desired college. However, if you have studied the basics of political Science at the graduation level, you just have to revise them and practice previous year's papers to score better. The syllabus for the M.A. Political Science entrance exam includes the following topics:
1. Understanding the political theory
2. Concepts, and debates of political theory which include crucial topics such as rights, justice, etc.
3. Constitutional Government and Democracy in India
4. Political processes in India like elections
5. Comparative Government and Politics-Related Subtopics
6. Perspectives on Public Administration, Including the Evolution of Administration
7. Perspective on international relations and world history with emphasis on the 20th century (IR)
8. The political process and institutions in a comparative perspective
9. Public policy and administration in India, e. g. budget
10. Global politics; globalization and related themes
11. Classical political philosophy of Plato, Hobbes, Aristotle, etc.
12 and 13. Indian political thoughts: It is divided into two parts, I and II.
14. Modern political philosophy, e. g. liberals, radicals, etc.

Since you have not mentioned any particular course, I assume you are referring to the B.Tech. In Information Technology and Mathematical Innovation offered by CIC under DU. Your percentile is high enough to make you eligible for admission; however, it may not assure you admission for this course as only 50 seats are available and priority will be given to CUET scores. Also, admission will be on a merit basis, and for outside Delhi candidates, the cut-off will be high. However, if you are referring to Delhi Technological University (DTU), then you may have some chances to get admission to branches like mechanical engineering and biotechnology.