Cognizant Interview Question

Can you explain the difference between abstraction and encapsulation? How does inheritance work in object-oriented programming? What is the difference between a stack and a queue? Can you provide examples of their applications? Can you explain the concept of polymorphism and provide an example? Problem-Solving Questions: Given an array of integers, how would you find the largest and smallest numbers? How would you reverse a linked list? Write a function to check if a string is a palindrome. Implement a function to calculate the Fibonacci sequence. Behavioral Questions: Can you describe a challenging problem you faced on a previous project and how you solved it? How do you prioritize tasks when working on multiple projects simultaneously? Can you describe a situation where you had to work with a difficult team member and how you handled it? How do you stay updated with new technologies and trends in software development? System Design Questions: Design a URL shortening service like Bitly. How would you design a distributed key-value store? Design a system for real-time analytics of user interactions on a website. Discuss the architecture of a scalable chat application.