Hey Harshit

thecprograms.com (//thecprograms.com) is a good website for getting most questions and problems related to the C language. It has got a good number of application based code and various patterns of different level. It is a good source for School and Undergraduate students who are studying C in their curriculum, but it won't help much if you want to apply for Placements/Internships or you want to work on Product based services being dependent on the website.

For further doubts, ask us.