What if cds doesn't work out?

I'm currently in my fourth year of engineering. My placement season has officially but honestly I'm not interested in it at all. I really want to prepare for cds and try my shot. But my parents keep asking one thing , that what if, cds doesn't work out? What will I do then?

Any final year or graduates here who are on the same boat? do you guys have a plan B? Please guide me on this, I'm getting anxious day by day..ik it's not a good thing to be this anxious even without trying but still my parents keep asking the same thing again and again, and idk what to answer to that