Cognizant Junior Java Developer interview questions

There was two rounds of interview-Technical & HR. In technical interviewer first asked about my self and then told me to pick any two subjects of my interest. I told him c and oops concepts. So first he asked what is a datatype and what are the data types supported by c. What is a local variable and global varriable? What is a function and what do you mean by function declaration and function implementation. Write down a code to find the 2nd largest element in a array of integers. What are the main features of the oops? Explain polymorphism. What is a constructor and what are the different types of constructors Final keywod. I don't remember rest of the questions. Approximately I answered 70% of the questions after that hr round was there. He just asked about myself and what do you know about Cognizant. 3 or 4 more questions he asked. It was more like a discussion rather than a interview and I got selected.