Round 1 (Virtual)

Java HashMap implementation

Two Sum implementation

Follow-up: Print all unique answers in single traversal

SQL question (Joins and Order By)

Round 2 (On Site)

Java Stack implementation

Java Queue implementation

SQL question: Find Kth highest employee salary without considering duplicates (DENSE_RANK)

Given a sorted array in asc order where 2 elements are swapped:

Return true if only 2 elements are swapped

Return false if more than 2 elements are misplaced

Puzzle: 1000 wine bottles, 10 rats, poisoned bottle question

Difference between exception and error and asked about NoClassDefFoundError and ClassNotFoundExcetion

Round 3 (On Site)

SQL question (NOT IN)

Find your name’s index from a dictionary (name has 5 letters, all unique)

Given 2 strings s1 and s2, check if s2 is a rotated string of s1

Verdict: Rejected

Previous interview experience for oracle:
Round 1 (Virtual)
Reverse linked list in k groups

Verdict: Rejected