Viaplus Senior Software Engineer Interview Questions and Answers

Q1. Mimic Dataframe Merge
Ans. 
Implement a function to mimic the functionality of merging two DataFrames in Python.
• Create a function that takes two DataFrames as input.

• Merge the two DataFrames based on a common column or index.

• Handle different types of joins like inner, outer, left, and right joins.

• Return the merged DataFrame as output.
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Q2. Improve above case by case
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1 hour - Find longest palindromic substring

Array and Java related questions

Hacker rank test. Basic coding questions on arrays, list etc.

Q1. Interactive session. Theoritical questions on oops, multithreading, springboot, java8 and few coding questions.
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Q1. Design round. Questions on system design and best practices to be followed while developing any service. Few managerial questions as well.
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Q1. Profile related questions and salary discussion.
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Q1. Medium prepare well on data structure
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Q2. Find duplicate elements in array
Ans. 
Find duplicate elements in array
• Iterate through array and compare each element with all other elements

• Use a hash table to keep track of seen elements

• Sort the array and compare adjacent elements
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Q3. Remove duplicate elements in array
Ans. 
Remove duplicate elements in array
• Use a hash table to keep track of elements already seen

• Sort the array and remove adjacent duplicates

• Use a Set to store unique elements
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Q1. Based on api fetching and data optimazation
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Q1. Basic hr questions like inmovation creation difference
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Q1. With manager one to one discussion on projects
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2 Leetcode medium - LRU Cache and sliding window question

Q1. Design Whatsapp
Ans. 
Design a messaging app like Whatsapp
• Implement end-to-end encryption for secure messaging

• Allow users to send text messages, images, videos, and documents

• Include features like group chats, voice and video calls, status updates

• Provide option for users to share their location

• Develop a user-friendly interface with customizable settings
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Q1. Basics .net , c#, sql
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Q1. Current Project Details, Roles and some technical questions too
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Q1. Package Discussion and Other basic details
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Discussion about OOPS concepts and String related program

Program on Recursion and Array

Q1. Strength and Weakness
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Q2. Reason for joining with company
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Good technical round, you can manage, mainly Java questions used to come

Q1. HR round is also good package discussion will happen
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Q2. Company personal so kept secret
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