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11,457 junior software engineer interview questions shared by candidates

Write a function to find the first non-repeating character in a string. How would you implement a queue using two stacks? Design a URL shortener like Bitly. Explain how you would store URLs, handle collisions, and scale the system. Here’s a piece of code. It doesn’t compile/run as expected. Can you identify and fix the issue? Can you describe a challenging project you worked on, how you approached it, and the outcome? Explain the difference between depth-first search (DFS) and breadth-first search (BFS). When would you use each? What are the differences between let, const, and var in JavaScript?
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Junior Software Developer

Interviewed at SAP

4.2★
Jan 13, 2025

Write a function to find the first non-repeating character in a string. How would you implement a queue using two stacks? Design a URL shortener like Bitly. Explain how you would store URLs, handle collisions, and scale the system. Here’s a piece of code. It doesn’t compile/run as expected. Can you identify and fix the issue? Can you describe a challenging project you worked on, how you approached it, and the outcome? Explain the difference between depth-first search (DFS) and breadth-first search (BFS). When would you use each? What are the differences between let, const, and var in JavaScript?

C function to swap to integers, directly and swapping two pointers that points to integers. C function dealing with bit by bit, but i don't really remember the application. sych and asych. interrupts and ISR, asked to write ISR and draw what will happen on the memory A lot of Questions on memory and what will happen if any of those functions were executed CAN, LIN, UART, SPI and I2C.. how they work macros and functions #if rentrant functions
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Junior Embedded Software Engineer

Interviewed at Valeo

3.7★
Dec 15, 2016

C function to swap to integers, directly and swapping two pointers that points to integers. C function dealing with bit by bit, but i don't really remember the application. sych and asych. interrupts and ISR, asked to write ISR and draw what will happen on the memory A lot of Questions on memory and what will happen if any of those functions were executed CAN, LIN, UART, SPI and I2C.. how they work macros and functions #if rentrant functions

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