Eurofins It Solutions Software Engineer Interview Questions and Answers

Flatten a binary tree.

Q1. Project discussion, tech stack used, problems faced etc .
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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. Write code of palindrome
Ans. 
Code to check if a given string is a palindrome or not.
• Create a function that takes a string as input

• Remove all non-alphanumeric characters and convert to lowercase

• Compare the original string with its reverse to check for palindrome
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Q2. How to pass data in angular from component to component
Ans. 
Data can be passed in Angular from component to component using input properties, output properties, services, and state management libraries like NgRx.
• Use @Input decorator to pass data from parent to child component

• Use @Output decorator to emit events from child to parent component

• Use services to share data between components

• Use state management libraries like NgRx for complex data sharing scenarios
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