Java Serialization And Networking — Part 1 MCQs with Explanations

The correct answer is Option B: https . Let's break down why: The code uses the java.net.URL class, which is designed to work with URLs (Uniform Resource Locators). A URL is essentially an address for a resource on the internet, like a webpage. The line URL obj = new URL("https://www.example.com/javamcq"); creates a new URL object named 'obj'. This object represents the URL "https://www.example.com/javamcq". The obj.getProtocol() method is called. This method specifically extracts the protocol part of the URL. The protocol is the first part of a URL that indicates how the data will be transferred. Common protocols are "http" and "https". In the given URL "https://www.example.com/javamcq", the protocol is "https". Therefore, obj.getProtocol() will return "https", which is then printed to the console using System.out.print() .

The process of converting an object into a byte stream is the correct answer to “What is Java Serialization”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

`Serializable` is the correct answer to “Which interface in Java is used to mark a class as serializable”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To write objects to an output stream is the correct answer to “What is the purpose of the `ObjectOutputStream` class in Java Serialization”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

It indicates that the variable should not be serialized is the correct answer to “In Java Serialization, what is the purpose of the `transient` keyword when applied to an instance variable”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

The process of converting a byte stream back into an object is the correct answer to “What is deserialization in Java Serialization”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

`ObjectInputStream` is the correct answer to “Which class in Java is responsible for deserialization during Java Serialization”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To create a client socket for communication with a server is the correct answer to “In Java Networking, what is the purpose of the `Socket` class”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

A numerical identifier for a specific process on a host is the correct answer to “What is a port number in Java Networking”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

`ServerSocket` is the correct answer to “Which class in Java Networking is used to represent a server socket that listens for incoming client connections”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To represent a Uniform Resource Locator is the correct answer to “In Java Networking, what is the purpose of the `URL` class”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

SMTP (Simple Mail Transfer Protocol) is the correct answer to “Which protocol is commonly used for sending emails in Java Networking”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To perform HTTP network operations is the correct answer to “In Java Networking, what is the purpose of the `HttpURLConnection` class”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To send and receive datagrams over a connectionless UDP protocol is the correct answer to “What is the primary use of the `DatagramSocket` class in Java Networking”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To represent an IP address is the correct answer to “In Java Networking, what is the purpose of the `InetAddress` class”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

A small packet of data sent over a network is the correct answer to “What is a datagram in Java Networking”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To represent a packet of data for use with UDP communication is the correct answer to “In Java Networking, what is the purpose of the `DatagramPacket` class”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

`InputStream` and `OutputStream` is the correct answer to “Which class in Java Networking is used for reading and writing streams of bytes”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To represent a connection to a resource on the internet is the correct answer to “What is the purpose of the `URLConnection` class in Java Networking”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

FTP (File Transfer Protocol) is the correct answer to “Which protocol is commonly used for file transfer in Java Networking”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To send and receive multicast datagrams is the correct answer to “In Java Networking, what is the purpose of the `MulticastSocket` class”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

Sending data to a group of interested receivers is the correct answer to “What is a multicast in Java Networking”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

An `InvalidClassException` is thrown is the correct answer to “In Java Serialization, what happens if a serialized class changes between serialization and deserialization”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

`writeObject()` and `readObject()` is the correct answer to “Which method is used to customize the serialization process in Java”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To provide a version number for the serialized class is the correct answer to “In Java Serialization, what is the purpose of the `serialVersionUID` field”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

It provides classes for network communication is the correct answer to “What is the purpose of the `java.net` package in Java”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

`URL` is the correct answer to “Which Java class is used to represent a URL (Uniform Resource Locator)”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

To listen for incoming client connections is the correct answer to “In Java Networking, what is the purpose of the `ServerSocket` class”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

HTTP (Hypertext Transfer Protocol) is the correct answer to “Which protocol is commonly used for web communication in Java Networking”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

`DatagramSocket` is the correct answer to “In Java Networking, which class is used for creating a UDP socket”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

It provides classes for input and output operations is the correct answer to “What is the primary use of the `java.io` package in Java”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

toExternalForm() is the correct answer to “Which of these methods is used to know the full URL of an URL object”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

Serialization is the correct answer to “Which of these is a process of writing the state of an object to a byte stream”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

parse() is the correct answer to “Which of these methods is used to make raw MIME formatted string”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

run() is the correct answer to “Which of these method is used to start a server thread”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

writeDiskCache() is the correct answer to “Which of these method of httpd class is used to write UrlCacheEntry object into local disk”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

writeObject() is the correct answer to “Which of the following methods is used to avoid serialization of new class whose super class already implements Serialization”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

httpd is the correct answer to “Which of these class is used for operating on request from the client to the server”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

HttpResponse is the correct answer to “Which of these is a wrapper around everything associated with a reply from an http server”. This question is standard in competitive examination syllabi for Java Serialization And Networking.

False is the correct answer to “Default Serialization process cannot be overridden.”. This question is standard in competitive examination syllabi for Java Serialization And Networking.