Wipro Digital Accounts Supervisor Interview Questions and Answers for Freshers

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Q1. Technical questions ,salary discussion
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Q1. Basic two sum problem using hashmap. Follow up question to implement three sum problem.
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Q2. Basic core java questions. Questions on complexities of data structure.
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Q1. Questions on Java Streams and Collections, Low Level Design
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Q1. You have a list of numbers, now using stream api calculate the sum of all integers in a list ?
Ans. 
Use stream api to calculate sum of integers in a list.
• Use stream() method on the list to create a stream of elements.

• Use mapToInt() method to convert each element to an integer.

• Use sum() method to calculate the sum of all integers.
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Q2. Given two arrays of integers, find the one extra element in second array ? Eg. int[] arr1 = [1,3,7,8]; int[] arr2 = [3,8,7,9,1];
Ans. 
Loop through both arrays and use a hashmap to store frequency of elements, then find the extra element.
• Loop through both arrays and store frequency of elements in a hashmap

• Compare the frequency of elements in both arrays to find the extra element

• Return the extra element found in the second array
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Q1. Self introduction.
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Q2. About your project.
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