Welcome to your interview.
The question is on your right: Find Duplicates with Java Streams. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Implement a method to find and return duplicated numbers in an array of integers. You must write this using modern Java Streams.