I got referred by my friend, i got a call for an interview

Question

1. How you use Rest API in Rest Assured Framework
2. What is idempotency in Request
3. Difference between Post & Put?
4. Write Code to find 3rd largest Element In an Array
5. Count occurrences of letters using Map
6. What is the mean of 403(forbidden) Status Code?
7. What is the mean of 401(unauthorised) Status Code?
8. How do you do Authentication in RestAssured Framework?
9. How do you do Authorization in RestAssured Framework?
10. Define the implementation of Hashmap.
11. few questions based on String as mentioned down
12. Write Code to convert String a=”i love programming” to a=”I Love Programming”

• if String a=”ABC”; & String b=new String(“ABC”);
• True or False

1. is(a==b) =?
2. (a.equals(b))=?
3. c=”ABC”
4. (a==c)?
5. a.equals(c))=?

I don’t get any further call after this round