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Back End Developer Interview Questions
821 back end developer interview questions shared by candidates
¿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?
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)
Difference between PHP and Javascript
Pretty much basic OOP C# questions were discussed.
Suppose your wife moved to another country, would you follow her or would you stay with the company?
I was given a task to implement using their tech stack (MERN stack) It has a main required goal, and other optional requirements
Ask about the technologies that they require.
Where do see yourself in 3 years ?
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