WPP Software Engineer Interview Questions and Answers

Online test with two section one is general aptituide and Basic cs concepts. And Second round containing the 2 dsa question with intermediate level question.

Q1. Two sorted array in asscending order give the media of two array after merging in asscending order.
Ans. 
The median of two sorted arrays merged in ascending order.
• Merge the two sorted arrays into a single sorted array.

• Find the median of the merged array.

• If the merged array has an odd length, the median is the middle element.

• If the merged array has an even length, the median is the average of the two middle elements.
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Q2. Question on resume on java script 1. whats is closure? 2. what is hoisting? cookie session.
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Q1. Data structure and algorithm problems
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It consited of apti as well as coding questions

Q1. Basic questions of coding were asked like arrays,strings
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Q1. Introduce yourself
Ans. 
I am a software engineer with 5 years of experience in developing web applications using Java, Spring Boot, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring Boot, and Angular

• Strong problem-solving skills
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Q2. DS/Ago problem - dynamic programming
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Q1. C# oops polymorphism extension methods
Ans. 
Polymorphism is a key feature of OOP in C#. Extension methods allow adding new functionality to existing types.
• Polymorphism allows objects of different classes to be treated as if they are of the same type.

• Extension methods are static methods that can be called as if they were instance methods of the extended type.

• Polymorphism and extension methods can be used together to add new behavior to existing types without modi
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Q2. Angular javascript vs typescript services components
Ans. 
Angular is a framework for building web applications using TypeScript, which is a superset of JavaScript.
• Angular provides a structure for building web applications using components, services, and modules.

• TypeScript is a statically typed language that provides better tooling and error checking than JavaScript.

• Services in Angular are used for sharing data and functionality across components.

• Components in Angular are the ...read more
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Q1. They are asking technical questions what is their in the resume
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Q1. They will technical questions as per your resume what you mentioned
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Round duration - 75 minutes
Round difficulty - Easy

This round was conducted in Hackerrank portal for a total duration of 75 minutes and was divided into 4 sections.

1st Section : Aptitude Section : 14 questions , 28 minutes
2nd Section : Technical Section : 12 questions , 17 minutes
3rd Section :1 coding Questions : 20 minutes+30 minutes

This Round was Conducted on Hackerrank (Webcam Enabled).

Q1. Given a problem statement and a piece of code, how would you find and correct the bug in the code?
Ans. 
To find and correct a bug in code, analyze problem statement, review code, use debugging tools, and test different scenarios.
• Understand the problem statement and expected output

• Review the code for syntax errors, logical errors, and potential bugs

• Use debugging tools like breakpoints, print statements, and IDE debuggers

• Test the code with different inputs and edge cases to identify the bug

• Make necessary corrections and re
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Q2. 
Nodes at Distance K from Target Node in Binary Tree
Given a Binary Tree of distinct integers and two integers, target and K, return a list of values of all nodes located at a distance K from the target no...read more
Ans. 
Find nodes at distance K from target node in a Binary Tree.
• Use BFS to traverse the tree and keep track of the distance of each node from the target node.

• Maintain a set to keep track of visited nodes to avoid revisiting them.

• Return the values of nodes at distance K from the target node.
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Round duration - 90 minutes
Round difficulty - Medium

I was shared a link of Google Meet and the Google Docs was shared where there was 1 coding problem to be coded there and then the code was run on an IDE to check the sample tests.
Then the interview was followed by a lot of Operating System and Computer System Architecture Questions.
There were 2 Interviewers and both were helpful.
The timing was from 2:30 PM to 4:00 PM

Q1. 
Subarray Challenge: Largest Equal 0s and 1s
Determine the length of the largest subarray within a given array of 0s and 1s, such that the subarray contains an equal number of 0s and 1s.
Input:
Input beg...read more
Ans. 
Find the length of the largest subarray with equal number of 0s and 1s in a given array.
• Iterate through the array and maintain a count of 0s and 1s encountered so far.

• Store the count difference in a hashmap with the index as key.

• If the same count difference is encountered again, the subarray between the two indices has equal 0s and 1s.

• Return the length of the longest subarray found.
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Round duration - 45 minutes
Round difficulty - Easy

The round was held on Google Meet with HR from 2:30 PM to 3:15 PM.
The HR was friendly and asked the basic questions.