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Software Engineer Senior Interview Questions

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71,535 software engineer senior interview questions shared by candidates

Interview 1: - Abstract classes over interfaces. Why we use interfaces over abstract classes. - Given a sentence with each letter as a node of the linkedlist. Reverse the order of the words (not the word itself). "My name is Batman" -> "Batman is name my" - Zigzag level traversal of a tree.
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Senior Software Engineer

Interviewed at UiPath

3.6★
Sep 10, 2018

Interview 1: - Abstract classes over interfaces. Why we use interfaces over abstract classes. - Given a sentence with each letter as a node of the linkedlist. Reverse the order of the words (not the word itself). "My name is Batman" -> "Batman is name my" - Zigzag level traversal of a tree.

1. How to encrypt a set of string e.g. WAAAYYFFFFFAIIIRR to W1A3Y2F4A1I3R2 etc... And how to decrypt it back to original string (2 separate functions) 2. How to design a system so that user can check in their location thru their phone, and how to scale it when the app gets popular and millions of users are using it. How would you expand the application features when popularity grows. 3. How to design a database of Warehouse, Suppliers and Customers and they ask you to write various SQL queries to pull products sold, how many customers bought more than 30 products etc 4. A coding problem to simulate the coin game and gambler's fallacy (if they are 4 Heads in a row, gambler would bet on Tail, and vice versa).
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Senior Software Engineer

Interviewed at Wayfair

3★
May 23, 2019

1. How to encrypt a set of string e.g. WAAAYYFFFFFAIIIRR to W1A3Y2F4A1I3R2 etc... And how to decrypt it back to original string (2 separate functions) 2. How to design a system so that user can check in their location thru their phone, and how to scale it when the app gets popular and millions of users are using it. How would you expand the application features when popularity grows. 3. How to design a database of Warehouse, Suppliers and Customers and they ask you to write various SQL queries to pull products sold, how many customers bought more than 30 products etc 4. A coding problem to simulate the coin game and gambler's fallacy (if they are 4 Heads in a row, gambler would bet on Tail, and vice versa).

Implement a class called AirMap that has two methods: 1. add_route(start, destination) - adds ONE WAY connecting flight from one airport to another 2. print_all_routes(start, destination) - prints all possible routes from start to destination Given the following routes, print all possible routes between the airport C and D: A -----> B B -----> A A -----> C C -----> A A -----> D D -----> A B -----> C C -----> B B -----> D D -----> B Expected Output: C,A,B,D C,A,D C,B,A,D C,B,D
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Senior Software Engineer

Interviewed at Bloomberg

4★
Nov 1, 2021

Implement a class called AirMap that has two methods: 1. add_route(start, destination) - adds ONE WAY connecting flight from one airport to another 2. print_all_routes(start, destination) - prints all possible routes from start to destination Given the following routes, print all possible routes between the airport C and D: A -----> B B -----> A A -----> C C -----> A A -----> D D -----> A B -----> C C -----> B B -----> D D -----> B Expected Output: C,A,B,D C,A,D C,B,A,D C,B,D

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