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Back End Engineer Interview Questions
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Le domande del colloquio conoscitivo riguardano il percorso accademico, le domande del tecnico riguardano Java ( classi astratte, interfacce, modificatori)
Mi è stato chiesto di raccontare la mia esperienza lavorativa.
Write an application which connects to Twitter Stream API and collect 100 tweets or listen the stream for 30 seconds. Sort the authors and tweets in an ascending order by creation date.
What are the trade-offs between raw SQL queries and the use of an ORM
How many years of exp in java
Che Reddito Annuo Lordo percepisci attualmente?
What are the main principles of OOP? What is the difference between an interface and an abstract class? How does HashMap work internally? What is hash collision? What is the difference between equals() and hashCode()? Why is String immutable in Java? What are checked and unchecked exceptions? What is the difference between ArrayList and LinkedList? What is the difference between HashMap and ConcurrentHashMap? Explain the lifecycle of a thread. What is the difference between Runnable and Callable? What is synchronization? What is the volatile keyword? What are lambda expressions? What is the Stream API in Java 8? 🚀 Spring Boot What is Spring Boot? What is the difference between @Component, @Service, and @Repository? How does dependency injection work in Spring? What is @Autowired? What is the Spring Bean lifecycle? How do you handle exceptions globally in Spring Boot? What is REST and how does it work? How do you secure a Spring Boot application? Explain the flow of a REST API request in Spring Boot. What is Spring Security? 🔐 JWT / Security What is JWT? How does JWT authentication work? What is the difference between authentication and authorization? How do you implement role-based access control? 🧱 Microservices What is the difference between monolithic and microservices architecture? What are the advantages of microservices? How do microservices communicate with each other? What is an API Gateway? What is service discovery? What is a circuit breaker? How do you handle failures in microservices?
Get all odd numbers from a singly linked list.
Create a service which implements the provided method
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