Web Dev Quizz 1

What is the difference between == and .equals() when comparing two objects in Java?

• == compares object references;
  .equals() compares object values

• == compares object values;
  .equals() compares object references

• == and .equals() are used interchangeably in Java

• == and .equals() both compare object references

Which Java collection is best suited for maintaining a unique set of elements with no duplicates?

• ArrayList

• LinkedList

• HashSet

• TreeMap

What HTTP status code is returned when a resource is successfully created on the server?

• 200

• 201

• 204

• 400

Explain the concept of microservices architecture and how it differs from a monolithic architecture.

• Microservices divide an application into smaller, independent services; Monolithic is a single, large application

• Microservices are used only in mobile app development; Monolithic is for web applications

• Microservices are a type of database; Monolithic is a type of server

• Microservices are used in mainframe computing; Monolithic is used in cloud computing

What is a checked exception in Java, and when should you use them in your code?

• Checked exceptions are always thrown at runtime; use them for critical errors

• Checked exceptions must be caught or declared; use them for recoverable errors

• Checked exceptions are never thrown; they are used for documentation purposes

• Checked exceptions are handled by the JVM automatically; use them for all exceptions

Briefly describe the difference between authentication and authorization in web security.

• Authentication verifies a user's identity; authorization defines what actions they can perform

• Authentication controls access to web pages; authorization validates user input

• Authentication encrypts data; authorization decrypts data

• Authentication and authorization are the same concepts in web security

What is multithreading, and how can it improve the performance of a Java application?

• Multithreading is the same as multiprocessing; it doesn't improve performance

• Multithreading allows an application to execute multiple threads concurrently, improving responsiveness and resource utilization

• Multithreading can only be used in distributed systems

• Multithreading reduces the performance of a Java application

JSP ( Java Server Pages ) runs on a _(1)_ and respond to requests from _(2)_

• (1) client, (2) servers

• (1) device, (2) users

• (1) browser, (2) databases

• (1) server, (2) clients

Name two popular front-end JavaScript frameworks/libraries used for building single-page applications (SPAs).

• Angular and React

• Java & C#

• JQuery & Bootstrap

• Python & Ruby

What is the purpose of API documentation, and name a commonly used format for documenting RESTful APIs.

• API documentation provides information about the API's author;

  Swagger is a commonly used format

• API documentation is used for testing APIs;
  XML is a commonly used format

• API documentation helps developers understand how to use an API;
  Swagger and OpenAPI are commonly used formats

• API documentation is not necessary for RESTful APIs