Backend Developer Interview Questions

15,457 backend developer interview questions shared by candidates

The codility problems where medium level I would say. The HR interview is a standard one: you got to talk a little bit about your previous experience (in my case was mainly University since I'm a fresh graduate) and then you got the usual questions about how to deal with situation in the specific case and so forth. The technical interview was pretty standard as well: the interviewer presented a coding problem and ask me to solve it. It took me a while to do that but eventually I was able to solve it and had some question about code complexity and the data structure used in my code.
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Backend Engineer

Interviewed at Zalando

3.6
Dec 3, 2019

The codility problems where medium level I would say. The HR interview is a standard one: you got to talk a little bit about your previous experience (in my case was mainly University since I'm a fresh graduate) and then you got the usual questions about how to deal with situation in the specific case and so forth. The technical interview was pretty standard as well: the interviewer presented a coding problem and ask me to solve it. It took me a while to do that but eventually I was able to solve it and had some question about code complexity and the data structure used in my code.

1st round: 1. Time and Space complexity of all the data structures and algorithms. 2. What is Scaling? What is Vertical and Horizontal Scaling? 3. Questions on Java 8 2nd round: 3 coding questions, I attended only two 1. Balancing brackets like "()[]{}" and "([)]" . Push in stack if open bracker is encountered and pop from Stack if closing bracket is the and match them. https://leetcode.com/problems/valid-parentheses/ 2. Given a linked list, determine if it has a cycle in it https://leetcode.com/problems/linked-list-cycle/
Oct 31, 2021

1st round: 1. Time and Space complexity of all the data structures and algorithms. 2. What is Scaling? What is Vertical and Horizontal Scaling? 3. Questions on Java 8 2nd round: 3 coding questions, I attended only two 1. Balancing brackets like "()[]{}" and "([)]" . Push in stack if open bracker is encountered and pop from Stack if closing bracket is the and match them. https://leetcode.com/problems/valid-parentheses/ 2. Given a linked list, determine if it has a cycle in it https://leetcode.com/problems/linked-list-cycle/

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