3. Cree:  The multinational manufacturer of semiconductor materials and devices, Cree, was founded in the year 1987, by researchers from the North Carolina State University. The company has its headquarters in Durham, North Carolina, U.S. If you wish to work in the company, that enhance the value of LED, solid-state lighting, power, and communications products by significantly increasing their energy performance, you need to really prepare well as the company sets tough twisted long questions for the applicants who aspire to work here. Sean Brody, recruiting manager at Raleigh, N.C.-based Cree said that this is where he sees applicants trip up the most. "Most of our candidates aren't local to Raleigh," he said, which hints that applicants travel from far of places for a day- long session. According to him one needs a great stamina to face the interviews here.