Java Library

What is the Jackson library used for in Java? A) For serializing Java objects to JSON and deserializing JSON to Java objects B) For managing database connections C) For handling XML data D) For building user interfaces Answer: A) For serializing Java objects to JSON and deserializing JSON to Java objects Explanation: The Jackson library […]

How does the Guava EventBus work? A) It allows for decoupled event publishing and subscription B) It handles database transactions automatically C) It manages HTTP requests in a web application D) It provides a GUI framework for Java applications Answer: A) It allows for decoupled event publishing and subscription Explanation: The Guava EventBus allows for

What is the purpose of the Guava Ordering class? A) To create and manage complex comparison logic B) To manage database queries C) To configure HTTP request ordering D) To sequence method calls in multithreading Answer: A) To create and manage complex comparison logic Explanation: The Guava Ordering class is used to create and manage

What does Guava’s Splitter class do? A) It splits strings into components based on a separator B) It divides files into multiple parts C) It distributes tasks across multiple threads D) It breaks down large datasets into smaller subsets Answer: A) It splits strings into components based on a separator Explanation: Guava’s Splitter class is

What is the purpose of Guava’s Joiner class? A) To concatenate elements of a collection into a single string B) To merge multiple files into one C) To combine multiple databases D) To create complex SQL queries Answer: A) To concatenate elements of a collection into a single string Explanation: Guava’s Joiner class is used

How does Guava handle caching? A) Through the Cache interface and CacheBuilder class B) By using the Map interface C) By storing data in files D) By using the System properties Answer: A) Through the Cache interface and CacheBuilder class Explanation: Guava handles caching through the Cache interface and the CacheBuilder class. These provide a

What does the Guava Preconditions class provide? A) Methods for checking method arguments and state B) Tools for managing database transactions C) Utilities for handling I/O operations D) Methods for parsing and formatting dates Answer: A) Methods for checking method arguments and state Explanation: The Guava Preconditions class provides methods for checking method arguments and

What is the purpose of the Guava Optional class? A) To handle nullable values in a safe way B) To manage optional configuration files C) To provide an alternative to method overloading D) To store optional data in a map Answer: A) To handle nullable values in a safe way Explanation: The Guava Optional class

What does the Guava Multimap class provide? A) A collection that maps keys to multiple values B) A map that supports concurrent access C) A thread-safe implementation of HashMap D) A map that stores values in sorted order Answer: A) A collection that maps keys to multiple values Explanation: The Guava Multimap class provides a

What is the purpose of the Guava ImmutableList class? A) To create immutable lists that cannot be modified after creation B) To perform I/O operations C) To handle database connections D) To manage user interfaces Answer: A) To create immutable lists that cannot be modified after creation Explanation: The Guava ImmutableList class is used to

What does the Guava Lists class provide? A) Utility methods for working with lists B) A way to handle I/O operations C) A framework for building GUIs D) A method for logging events Answer: A) Utility methods for working with lists Explanation: The Guava Lists class provides utility methods for working with lists in Java.

What is Google Guava? A) A set of core libraries for Java developed by Google B) A web framework for building Java applications C) A database management tool D) A logging framework for Java Answer: A) A set of core libraries for Java developed by Google Explanation: Google Guava is a set of core libraries

What is the purpose of the OPTIONS method in REST? A) To describe the communication options for the target resource B) To create a new resource C) To retrieve a resource D) To delete a resource Answer: A) To describe the communication options for the target resource Explanation: The OPTIONS method in REST is used

What is a resource in the context of REST? A) Any identifiable entity that can be manipulated using HTTP methods B) A static file on the server C) A database table D) An HTML page Answer: A) Any identifiable entity that can be manipulated using HTTP methods Explanation: In the context of REST, a resource

Which HTTP method is typically used to update an existing resource in REST? A) PUT B) GET C) DELETE D) POST Answer: A) PUT Explanation: The PUT method is typically used to update an existing resource in REST APIs. When a client sends a PUT request, it usually includes the updated data in the request

What is HATEOAS in REST API design? A) Hypermedia as the Engine of Application State B) HTTP API Transfer Engine of Application Services C) Hypertext Application Template of Engine Services D) Hypermedia and Text Application Engine System Answer: A) Hypermedia as the Engine of Application State Explanation: HATEOAS stands for Hypermedia as the Engine of

Which status code indicates a successful GET request? A) 200 OK B) 201 Created C) 400 Bad Request D) 500 Internal Server Error Answer: A) 200 OK Explanation: The status code 200 OK indicates a successful GET request in REST APIs. When a server returns this status code, it means that the request was processed

What is the purpose of status codes in REST APIs? A) To indicate the result of the HTTP request B) To format the data in a specific way C) To define the structure of the API D) To secure the API Answer: A) To indicate the result of the HTTP request Explanation: Status codes in

What is a RESTful API? A) An API that adheres to REST principles B) An API for managing databases C) An API for building user interfaces D) An API that supports only XML Answer: A) An API that adheres to REST principles Explanation: A RESTful API is an API that adheres to REST (Representational State

Which HTTP method is used to delete a resource in REST? A) DELETE B) GET C) POST D) PUT Answer: A) DELETE Explanation: The DELETE method in REST is used to delete a resource on the server. When a client sends a DELETE request, it specifies the resource to be removed by its URL. The

What is the difference between PUT and POST methods in REST? A) PUT is idempotent, POST is not B) POST is idempotent, PUT is not C) PUT retrieves data, POST deletes data D) POST updates resources, PUT retrieves resources Answer: A) PUT is idempotent, POST is not Explanation: The key difference between PUT and POST

What is the purpose of the POST method in REST? A) To create a new resource on the server B) To update an existing resource C) To delete a resource D) To retrieve a resource Answer: A) To create a new resource on the server Explanation: The POST method in REST is used to create

Which HTTP method is used to retrieve data from a server in REST? A) GET B) POST C) PUT D) DELETE Answer: A) GET Explanation: The GET method in HTTP is used to retrieve data from a server. It is one of the most commonly used methods in RESTful APIs. A GET request fetches the

What does REST stand for? A) Representational State Transfer B) Reliable State Transfer C) Remote State Transfer D) Reusable State Transfer Answer: A) Representational State Transfer Explanation: REST stands for Representational State Transfer. It is an architectural style that defines a set of constraints and principles for creating web services. RESTful services are stateless, meaning

How do you verify that a method was called a specific number of times in Mockito? A) By using verify(mock, times()) B) By using assert(mock, times()) C) By using verify(mock, count()) D) By using assert(mock, count()) Answer: A) By using verify(mock, times()) Explanation: In Mockito, you can verify that a method was called a specific