Pergunta de entrevista da empresa Standard Chartered Bank

1. Given an array of integers, filter even numbers, double them, and find their average using Java 8 Streams. Return 0 if no even numbers. 2. Given a list of strings, return the set of unique characters from each string. 3. Given array: int[] arr = {0, 1, 0, 1, -5, 0, 4}, rearrange the array such that all zeros are moved to the end. Output should be: [1, 1, -5, 4, 0, 0, 0]