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Backend Developer Interview Questions
15,491 backend developer interview questions shared by candidates
1. Describe Some Feature you worked on recently 2. Let's say we have an API with a rate limit of 20 req/ IP/ min. How would you design/implement this limit?
Basic back end questions like: - the difference between TCP & UDP. - pass by reference vs pass by value - How to do authorization - Encryption vs Hashing
VP interview - 4 buttons logic puzzle
Design splitwise application Input You can create a few users in your main method. No need to take it as input. There will be 3 types of input: Expense in the format: EXPENSE <user-id-of-person-who-paid> <no-of-users> <space-separated-list-of-users> <EQUAL/EXACT> <space-separated-values-in-case-of-non-equal> Show balances for all: SHOW Show balances for a single user: SHOW <user-id> Output When asked to show balance for a single user. Show all the balances that user is part of: Format: <user-id-of-x> owes <user-id-of-y>: <amount> If there are no balances for the input, print No balances In cases where the user for which balance was asked for, owes money, they’ll be x. They’ll be y otherwise.
Implement fibonacci sequence function
Discussing the architecture of a hypothetical system and questions about past experiences
Return maximum number formed by reordering the digits in a given number 43525 --> 55432
They asked me in cache if we are using hashmap then in multi threading environment the cached data get inconsistent so for that what data structure we can use?
How would you change the given code so that it is unit testable.
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