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9,173 backend developer interview questions shared by candidates

Coding questions: 1. Given two strings s1 and s2 , find whether s2 is rotated version of s1 or not 2. Given an array find first non repeating integer. 3. Given a stack , remove middle element without using extra data structure 4. Search element in BST , provided leaf nodes are connected to each other forming circular doubly linked list. SQL and mongodb query ACID property Normalization caching mathematical series puzzle: given series ABBCCCDDD.... find 97th element? one system design question
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Backend Developer

Interviewed at Rebel Foods (Formerly Faasos)

3.8★
Aug 25, 2021

Coding questions: 1. Given two strings s1 and s2 , find whether s2 is rotated version of s1 or not 2. Given an array find first non repeating integer. 3. Given a stack , remove middle element without using extra data structure 4. Search element in BST , provided leaf nodes are connected to each other forming circular doubly linked list. SQL and mongodb query ACID property Normalization caching mathematical series puzzle: given series ABBCCCDDD.... find 97th element? one system design question

Q: Given two strings, you have to write a function that returns a boolean value that returns true if two strings are Anagrams and return false if they are not Anagrams. Two parameters have been passed to the function i.e String 1 and String 2. He told me to write down the function in the Notepad and present my screen while writing the code. (He mentioned that Brute Force Approach is also allowed).
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Backend Developer

Interviewed at Rebel Foods (Formerly Faasos)

3.8★
Jan 19, 2022

Q: Given two strings, you have to write a function that returns a boolean value that returns true if two strings are Anagrams and return false if they are not Anagrams. Two parameters have been passed to the function i.e String 1 and String 2. He told me to write down the function in the Notepad and present my screen while writing the code. (He mentioned that Brute Force Approach is also allowed).

Q: Given an unsorted array with duplicate elements. You have to remove the duplicate elements without using a built-in data structure(Java Collection Framework or C++ STL Library). The interviewer mentioned that you can use the data structure that you can build on your own like Array, LinkedList, etc. Only the approach was asked not code.
avatar

Backend Developer

Interviewed at Rebel Foods (Formerly Faasos)

3.8★
Jan 19, 2022

Q: Given an unsorted array with duplicate elements. You have to remove the duplicate elements without using a built-in data structure(Java Collection Framework or C++ STL Library). The interviewer mentioned that you can use the data structure that you can build on your own like Array, LinkedList, etc. Only the approach was asked not code.

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