Tesco Software Engineer interview questions

My interview was through campus placement (around oct 2014, my 7th sem), for a Java/.NET software engineer, package 4.88l per annum, work loacation: Bangalore, India. there were 4 rounds, aptitude, programming, technical, HR. Programming round is very good, it had 3 questions and you get a choice to program in any of these languages: c++,c,java,c# questions are the same...and they check your logical ability and only basic programming syntax is enough for coding (I'm an Electronics and Communications Engineer). I cleared it, because i was able to code for all three questions, last one i had a slight output discrepancy. Even loads of Computer science guys didn't clear it...they perhaps lacked the logic to solve the questions...I was experienced with programming logic, because of several mini projects. I got out in technical round, for the question that i've mention below. I was the second last candidate, perhaps the interviewer was tired or something. He said i dont have much practical knowledge of things. Note: I had 3 mini projects under my belt I answered questions on C++, Hardware etc...