First of all let me clarify you that There are two types of executive MBA's provided by IIM's.

First one is the course  with at least 5 years of work experience. This is a one-year full-time course, commonly known as PGPX. You can sit for placements in this course.

Second type refers to a part-time program for working professionals. This is a simultaneous program with the ongoing job and as a result of which candidates are usually not eligible for placements.

All the best!!