Appearance

Sidebar Navigation

Overview

Node.js

All Node.js

What is Node.js and when is it a good fit?

How does the Node.js event loop work?

What is the difference between CommonJS and ES modules?

How do streams work in Node.js?

How do you handle errors in asynchronous Node.js code?

What is the cluster module used for?

How do worker threads differ from child processes?

How do you manage configuration in Node.js?

How do you prevent a Node.js memory leak?

How do you secure a Node.js application?

Express

All Express

What is Express?

How does Express middleware work?

How do you structure an Express application?

How do you handle errors centrally in Express?

How do you validate request input?

How do you implement authentication middleware?

How do you version an Express API?

How do you serve static assets securely?

How do you test Express routes?

How do you handle graceful shutdown in Express?

Java

All Java

What are the main features of Java?

How do the JVM, JRE, and JDK differ?

What is the difference between an interface and an abstract class?

How does Java garbage collection work?

What is the Java memory model?

What is the difference between checked and unchecked exceptions?

How do Java collections differ?

What is immutability in Java?

How does concurrency work in Java?

What are records and sealed classes?

Spring Boot

All Spring Boot

What is Spring Boot?

What does dependency injection mean in Spring?

What are Spring Boot starters?

How do you create a REST controller?

How does Spring Boot auto-configuration work?

How do you manage configuration profiles?

How do you handle exceptions globally in Spring Boot?

How do you validate request bodies?

How do you test a Spring Boot application?

How do you secure a Spring Boot API?

Python

All Python

What are Python decorators?

How do Python generators work?

What is the difference between a list and a tuple?

How does Python manage memory?

What are virtual environments?

How do you handle exceptions in Python?

What is the Global Interpreter Lock?

How do async and await work in Python?

How do you structure a Python package?

How do you test Python code?

REST API

All REST API

What makes an API RESTful?

How do you choose HTTP methods?

What status code should an API return?

How do you design resource URLs?

How do you paginate an API?

How do you version a REST API?

How do you make an API idempotent?

How do you design API error responses?

How do you secure a REST API?

How do you document a REST API?

GraphQL

All GraphQL

What is GraphQL?

How does GraphQL differ from REST?

What are queries, mutations, and subscriptions?

How do you design a GraphQL schema?

What is the N+1 query problem?

How do DataLoaders work?

How do you handle GraphQL errors?

How do you paginate a GraphQL connection?

How do you secure a GraphQL API?

How do you version a GraphQL schema?

On this page

Spring Boot

Browse questions in this section. Start here.

Pager

Previous pageWhat are records and sealed classes?

Next pageWhat is Spring Boot?

Built for developers preparing for technical interviews. · About us · Contact us · Privacy policy · Terms & conditions

Spring Boot ​

Spring Boot