Hey!

IES syllabus varies from branch to branch. it is conducted in three stages: prelims, mains and personality test. stage 1 prelims basically includes questions from general aptitude and engineering aptitude and mains exam consists of questions from your bachelor's degree. However the prescribed syllabus for some of the branches like ECE are same for prelims and mains. But kindly note that prelims is more of aptitude type questions, so stage 1 exam is almost same for every branch.

For more info visit here:

IES ECE Syllabus 2020-21 for Prelims & Mains - Download Subject Wise Syllabus Here (careers360.com)

Thankyou