Paytm QA Interview Experience

Round 1: Written test (if you will carry laptop then it is a proper testing questions): 40 questions with basic cmd commands, basic SQL commands, basic program snippets to check. written test is easier than online test(if you will carry laptop). Round 2: 1st technical round: programming language chosen by me: JAVA (they don't look for correct answers just check for your approach) 1st question: write a program to print the number of alphabets in your name. I said by using string.length but she told me not by using it. Then i convert string to char array and used a for loop till array.length and incremented the counter each time the loop ran. 2nd question: it is 3:15 in the clock tell the angle between hour and minute hand. 3rd question(do you have good knowledge of sql? my answer:No): java basic questions: method overriding and overloading. 4th question: design hypothetical test cases for switch, create hypothetical test case for water bottle.   Round 3: 2nd technical round Question 1: A to B distance=x&speed=20 km/hr, B to C distance=x&speed=y. tell the speed B to C such that the average speed=40 km/hr. (My answer=60 km/hr) but sir changed the question to A to B Distance=x & speed=40 km/hr, B to C distance=2x & speed=y. tell the speed B to C such that the average speed=40 km/hr Question 2: write a program to print fibonacci series (i used long array to store fibonacci series) Question 3:(knowledge of unix or sql:(My answer:no)) write a program to print factorial of a number(using recursion and without using recursion) Round 4: HR round Discussion about salary and other family questions