Visit following sites to test your C- Programming Skills

http://www.indiabix.com/online-test/c-programming-test/

http://stevenkobes.com/ctest.html

http://kooderi.acm.jhu.edu/ctest.html

http://www.pskills.org/c.jsp

http://www.cquestions.com/2012/02/c-programming-online-test.html

http://gd.tuwien.ac.at/languages/c/programming-bbrown/onlinet.htm

https://play.google.com/store/apps/details?id=com.esd.cprogrammingpracticetest&hl=en