Pegasystems Principal Software Developer In Test interview questions

I was contacted through a company recruiter Firstly they scan the resume. Ask everything from the resume. I was asked 30-40 questions in 1 hr 1. what is Spring? 2. What is difference between http and https? 3. JMeter ? or any exp in performance testing 4. How to mock db from junit 5. Reverse words in a string 6. Test paper cup, specifically performance tests 7. Interface abstract classes 8. List and set 9. Puzzle - 8 balls weighing, one of them is heavier or lighter, find which one in minimum ways 10. SQL - n th highest salary of employee 11. SQL - 3 tables, student , course, student-course find no of courses take by each student 12. puzzle -8 blocks, 8 numbers from 1-8 place it such that no adjacent numbers are beside each other 13. automation framework 14. how to mock objects 15. how does map work ?