Am I eligible for software Company?

You did not mention which company you want to join. There are companies which have a strict recruitment criteria for those they are hiring through campus. The typical criteria is that the candidate should have cleared all subjects without backlogs and should have a minimum of 60% throughout.

There are however few companies that conduct walk-ins and recruitment drives where you could get a chance to be interviewed. 

A general advice is that you should get certification in any technology of your choice and demonstrate your skill-set by coding something or building your project portfolio on Github. 

Look at a job with a smaller company where you can get recruited without having needing the all-clear criteria. Once you gain some experience in the industry - you won't be asked about your performance in engineering. 

Plz provide cdac entrance exam papers.. 

Hi Preeti, please check it here: https://www.crazyengineers.com/downloads/latest