Fibonalabs Software Development Engineer 1 interview questions

(Technical Interview) 1. About yourself 1. Write a program "check balanced paranthesis" and run . 2. Explain the approach and program logic. 3. OOPs concepts, abstract classes and interfaces 4. About projects, blockers faced in the projects and how did u solve? (HR with some technical questions) As the position is for Front End developer role they asked me, (technical questions) 1. What is HTML, CSS, JS and PHP ? 2. How browser works ? (HR) 1. About hobbies and extra curricular activities done in my college days. 2. Any tough situations faced and how did u overcome it?