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3,650 backen interview questions shared by candidates

1- Experience with AWS; 2 - Difference between EKS and ECS; 4 - Questions about integration/unit tests 3 - How would you create a non-singleton spring bean? 4 - Questions about the CI/CD 5 - What are the new features after Java 8? 6 - Question about ORM 7 - Describe OO Principles (Give an example about Polymorphism). 8 - Describe SOLID (Describe and give an example of the Dependency Inversion Principle) 9 - Describe the Factory method 10 - What design patterns are used in Spring (Describe Singleton and Prototype and give examples) 11 - Using Spies to mock static methods 12 - What are the types of injection in Spring? Why use Constructor injection is better? 13 - What are the best practices in Rest APIs? 14 - How did you debug an issue after the deploy to prod? 15- How to secure an API? 16 - What composes the JWT token? 17- Describe the top 10 types of API security vulnerabilities. 18 - Why use JPA/Spring Data instead JDBC?
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Senior Back End Engineer

Interviewed at Modus Create

3.6★
Aug 22, 2023

1- Experience with AWS; 2 - Difference between EKS and ECS; 4 - Questions about integration/unit tests 3 - How would you create a non-singleton spring bean? 4 - Questions about the CI/CD 5 - What are the new features after Java 8? 6 - Question about ORM 7 - Describe OO Principles (Give an example about Polymorphism). 8 - Describe SOLID (Describe and give an example of the Dependency Inversion Principle) 9 - Describe the Factory method 10 - What design patterns are used in Spring (Describe Singleton and Prototype and give examples) 11 - Using Spies to mock static methods 12 - What are the types of injection in Spring? Why use Constructor injection is better? 13 - What are the best practices in Rest APIs? 14 - How did you debug an issue after the deploy to prod? 15- How to secure an API? 16 - What composes the JWT token? 17- Describe the top 10 types of API security vulnerabilities. 18 - Why use JPA/Spring Data instead JDBC?

Comenzaron con preguntas generales de Computer Science, como: ¿Qué es una lista enlazada? Luego pasaron al live coding, donde había que resolver un ejercicio simple en JavaScript en un tiempo limitado. Se podía usar Google una sola vez durante la prueba.
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Back End Developer

Interviewed at Howdy

4.6★
Oct 6, 2025

Comenzaron con preguntas generales de Computer Science, como: ¿Qué es una lista enlazada? Luego pasaron al live coding, donde había que resolver un ejercicio simple en JavaScript en un tiempo limitado. Se podía usar Google una sola vez durante la prueba.

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