What is feasibility analysis in thesis proposal?
Feasibility is about whether the research can, in fact, be successfully completed with the time and other resources available. In an undergraduate course, a study requiring three years is infeasible.
If the research suggests building something, feasibility also involves whether it is possible to build such a thing given costs, and even, potentially, the laws of physics.
Another way to look at it for such a course is to ask, is this project actually do-able in the timeframe required. And if the answer comes up no, then you need to rescale or otherwise modify the proposal.