Senior Software Engineer

Q1. Core Java concepts, serialisation, multi threading, String, Collection
Q2. Project work experience and technologies
Q3. Join Queries, Java framework specific questions i.e. struts/spring/hibernate

You are given an array ‘ARR’ of size ‘N’ containing each number between 1 and ‘N’ - 1 at least once. There is a single integer value that is present in the array twice. Your task is to find the duplicate integer value present in the array.

For example:

Consider ARR = [1, 2, 3, 4, 4], the duplicate integer value present in the array is 4. Hence, the answer is 4 in this case.

Note :

A duplicate number is always present in the given array.

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