How long time it takes to run certain java code.
Back End Developer Interview Questions
822 back end developer interview questions shared by candidates
What is a generator
how did you identify a risk and how did you manage to mitigate it.
What is a list comprehension and the difference with a for loop in Python.
Ingest some data with Django and fill some collection. Fairly standard stuff.
Reverse the words in a string in a constant space complexity
After submitting the assessment, the interviewers reviewed my implementation in detail. One of the main things they asked me about was the design decisions I made, particularly around: How I handled authentication and authorization, and why I chose a specific approach (e.g., JWT vs. session-based, role hierarchy). My microservice setup, especially how I structured inter-service communication and ensured decoupling. Security considerations, such as how I protected file uploads and prevented common vulnerabilities. They were especially interested in understanding my reasoning behind certain architectural choices and how I ensured scalability and maintainability.
What are the key considerations when implementing custom routing logic in Elasticsearch to control how data is distributed across shards and nodes? (related to my side project)
Project architecture,bean scopes,java 11 features, sql queries like second highest salary
¿Qué es la programación orientada a objetos (OOP) en Java? ¿Qué diferencias hay entre == y .equals() en Java? ¿Qué es una clase interna o anónima en Java? ¿Qué son las expresiones lambda en Java? Da un ejemplo. ¿Qué es una interfaz funcional? ¿Qué paradigmas incorpora Java desde la versión 8? ¿Qué patrones de diseño has utilizado?
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