Interviews on Java

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День Святого Валентина (14 Февраля)

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Спектакль "Летучая мышь" г. Минск 3 января, 21 февраля, 15 марта 2026

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Компьютеры, игры, программирование

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Бережная перевозка лежачих больных

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Форум (ваши вопросы, обсуждение)

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Programming, development, testing

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Interviews on Java

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Interviews on Java

last updated: 15 February 2025

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Собеседование по Java EE — Spring Framework (вопросы и ответы). Часть 1

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What is Struts | Java

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Download and install

• Installation JDK (download and install the Java library for Windows)

• Download and install IntelliJ IDEA to explore Java, Spring, Jakarta EE | Functionality and differences: Community | Ultimate

Learn the language Java (class, interface, properties, etc.)

• Create a simple console app in IntelliJ IDEA to learn Java

• What is interface in Java ?

• Directly in the code (at runtime) we make an implementation for the interface | Java

• Threads in Java

• lambda is an unnamed method (no name and no class owned) | Java

• Exceptions and handling in Java. Example: try {...} catch (Exception e) {...}

• Why use throws Exception in the function name in Java? Answer: The method throws an exception and there is no handling of try catch. Example: float CalculateDensity(float mass, float volume) throws Exception { ... throw new Exception("Error! Volume is zero."); ... }

Java web application (servlet, jsp page, basic functionality and no frameworks)

• Creating a new simple web application (jsp web page) | Java, Maven

• Create a web servlet (the servlet is located on the web server, returns the result on request) | Java

• Installation Tomcat web server (download and install for Windows)

• Check, test Tomcat web server (create a new my.hml file)

• What is Maven

• What is a dynamic web page jsp (Java Server Page) ?

• How to install Smart Tomcat plugin in Intellij Idea

• Error "The SDK is not specified for module ... | Project SDK is not defined ..." in IntelliJ IDEA | Java

Spring in Java (Spring Framework, Spring Data, Spring Boot, ...)

• What is Spring? Why use Spring in Java?

• What is Spring Bean? What is Spring Container? IoC (inversion of control) | Creating a simple Spring project and configuration Spring Container in an XML file | Editor IntelliJ Idea and language Java

• What is Dependency Injection in Spring? Creating a simple Spring project with Dependency Injection in the constructor with the attributes @Component, @Autowired | Editor IntelliJ Idea and language Java

• Create a new Spring Web application (the request goes to the Controller → Controller creates a response as text or json) | Java, Spring Web, Spring Boot, Maven

• Creating a new Spring WebSocket application (Java WebSocket sends a message to the JavaScript WebSocket) | Java, Spring WebSocket, Spring Boot, Maven

• Create Azure Web App with the type Java (free). That is, create an empty web server

• Put the Java Spring web application in Azure

• Connect to the application Azure Web App (Java) via FTP | use File Explorer

• Error "The SDK is not specified for module ... | Project SDK is not defined ..." in IntelliJ IDEA | Java, Spring Boot

• How to install Spring WebSocket plugin in Intellij Idea

Jakarta EE / Java EE in Java (Web Applications, Web Services)

• What is Jakarta EE (Java EE)? | In which editor (program) is it convenient to write Jakarta EE (Java EE) code?

• Creating a simple web project in IntelliJ Idea Ultimate | Jakarta EE (Java EE)

Struts in Java (extends API Java Servlet using MVC)

• What is Struts | Java

• Interviews on Java

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