How can an ECE engineering student prepare for an IAS exam group 1?

You need hard work, dedication and preparations. You will get assistance from institutes such as: 1. Elite academy. 2. Brilliant tutorials. 3. Rau's IAS, etc. Besides, read national dailies and current event magazines to update your GK. The coaching manuals are available in leading book stalls.

If you are not able to prepare with self study, you can join a coaching institute. Refer to UPSC site for more details and sample papers. Please note that most of the IAS toppers are generally engineers or doctors. I am sure you can also make it.