Yamaha Motor Software Engineer interview questions

1) What port do MySQL works upon? 2) Pattern 1 2 3 4 5 2 5 3 5 4 5 5 Can you do it using only one loop? 3) How to implement a map? 4) What is polymorphism in java? 5) Given a string find the occurrences of each character without using inbuilt ds, functions and loops? 6) What if I delete a row containing a foreign key to another table? 7) How to fetch the first 5 elements from a table? 8) SQL Joins? 9) How to take input in JSP based web page? 10) Trigger and it’s backend working. 11) Are java and C++ purely object-oriented? which one is/not and why?

1) pattern prinitng 2) sql 3) strings