As you can see in my image there are two circles kept on the hexagon. I want to know how do I delete the intersecting part of circle and hexagon which i marked in yellow ovals..??
You can use
Unite in the
you could use the shape Builder tool
They work differently unite would be easier for this task.
select the objects and click the unite button in the pathfinder panel. (
window > pathfinder)
to use shapebuilder first select the objects then drag the tool over the parts you want to combined (conversely alt/opt drag to eliminate areas from shape)
Provided the hexagon is a single, closed path: