Computer Knowledge

Java Enterprise and Web Technologies

2,279 Questions

Java enterprise and web technologies questions focus on J2EE architecture, web services like SOAP, and servlet functionalities. These topics frequently appear in IT officer and specialist scale examinations. Regular practice ensures familiarity with enterprise application components.

HttpServlet methodsSOAP and web servicesEJB architecture rolesJ2EE componentsJSP servlet callingUDDI concepts

Java Enterprise and Web Technologies Questions

Multiple choice

Which framework is widely used for building web applications in Python?

  1. Django

  2. Flask

  3. Spring Boot

  4. Express.js
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Django is a high-level Python web framework that provides a comprehensive set of tools and features for rapid web development.

Multiple choice

Which framework is commonly used for building RESTful APIs in Node.js?

  1. Express.js

  2. Django

  3. Flask

  4. Spring Boot
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Express.js is a lightweight and flexible Node.js framework for building web applications and APIs.

Multiple choice

Which framework is commonly used for building web applications in C#?

  1. Django

  2. Flask

  3. ASP.NET Core

  4. Express.js
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

ASP.NET Core is a cross-platform, open-source framework for building modern web applications using C#.

Multiple choice

Which of the following is a popular framework for developing Microservices?

  1. Spring Boot

  2. .NET Core

  3. Node.js

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Spring Boot, .NET Core, and Node.js are widely used frameworks for developing Microservices, providing comprehensive features and tools for building, deploying, and managing Microservices applications.

Multiple choice

What is the purpose of a service in Angular?

  1. To provide reusable functionality across components

  2. To manage state and data

  3. To handle user input and events

  4. To perform HTTP requests
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Services in Angular are used to provide reusable functionality that can be shared across multiple components. This helps in reducing code duplication and improving maintainability.

Multiple choice

What is the purpose of the HttpClient module in Angular?

  1. To perform HTTP requests

  2. To handle user input and events

  3. To manage state and data

  4. To create custom HTML elements
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The HttpClient module in Angular is used to perform HTTP requests and fetch data from remote servers. It provides a simplified and type-safe way to make HTTP requests and handle responses.

Multiple choice

What is the concept of dependency injection in Angular?

  1. A technique for providing dependencies to components and services

  2. A way to create custom HTML elements

  3. A method for handling user input and events

  4. A mechanism for performing HTTP requests
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dependency injection in Angular is a technique for providing dependencies to components and services. It allows for a more modular and testable codebase, as dependencies can be easily swapped out or replaced.

Multiple choice

Which design pattern is implemented by Angular's Dependency Injection (DI) mechanism?

  1. Singleton

  2. Factory

  3. Decorator

  4. Observer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Angular's DI utilizes the Decorator design pattern to inject dependencies into components, services, and other Angular classes.

Multiple choice

What is the purpose of the @Inject() decorator in Angular?

  1. To specify the dependencies required by a service

  2. To define the scope of a service (root or component)

  3. To provide metadata about a service for DI

  4. To configure the lifecycle hooks of a service
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The @Inject() decorator in Angular allows you to specify the dependencies required by a service, enabling DI and the automatic instantiation of those dependencies.

Multiple choice

Which Angular service is responsible for making HTTP requests?

  1. HttpClient

  2. HttpService

  3. HttpRequest

  4. HttpResponse
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The HttpClient service in Angular is used for making HTTP requests and handling HTTP responses, providing a convenient way to communicate with RESTful APIs.

Multiple choice

Which Angular service is used for managing user authentication and authorization?

  1. AuthService

  2. UserService

  3. SecurityService

  4. JwtService
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

AuthService is a common name for a service in Angular that handles user authentication and authorization, providing methods for login, logout, and managing user roles and permissions.

Multiple choice

How can you specify the HTTP method for a fetch() request?

  1. Using the method option

  2. Using the type option

  3. Using the request option

  4. Using the data option
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The method option in the fetch() method allows you to specify the HTTP method to use for the request.

Multiple choice

What is the purpose of the headers option in the fetch() method?

  1. To specify the request headers

  2. To specify the response headers

  3. To specify the request body

  4. To specify the response body
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The headers option in the fetch() method allows you to specify the request headers to send with the request.

Multiple choice

What is the purpose of the readystatechange event in XMLHttpRequest?

  1. To notify when the request state changes

  2. To notify when the response is received

  3. To notify when the request is completed

  4. To notify when an error occurs
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The readystatechange event in XMLHttpRequest is used to notify when the state of the request changes.