Cognizant Entry Level Software Engineer interview questions

he interviewer arrived. Only 2 persons, I and the interviewer were present in the call. He introduced himself and asked for my introduction as well. Then he moved on to some questions. Asked about one of my projects. Explained to him thoroughly. He was satisfied with my answer. Asked about OOPs concepts like polymorphism, threading, etc. Answered. Asked to write the logic for 2 programming questions given by him. Calculate the sum of the elements in an even index as well as odd index of an array and print the difference between them. In a character string, print the frequency of repetitive characters. (I gave him a bubble sort kind of logic, he was quite happy and satisfied). Then he gave me 2 aptitude questions to solve which were quite easy. One was based on ages and the other was based on work and time. This was all for the technical interview. He asked me whether I have any questions for him, asked him a couple of questions and he answered them nicely. This round lasted for 25-30 minutes.