InetAddress class — Java Technical Interview Questions & Answers

InetAddress class

InetAddress class

  • java.net covers sockets, URLs, addresses. Socket = endpoint for TCP communication.
  • URL/URLConnection fetch remote resources.
  • Always handle IOException.
  • Write one tiny example for InetAddress class. Compile, print one result, and say the output out loud before you type.
  • Use InetAddress class only when the problem needs it. Don’t force it into every program. Know one beginner trap.
  • Let's take this on the board with one tiny Main class — no extra files. InetAddress class — prints local machine host name and IP — basic networking API. Start from main, go line by line, and stop at each print. That output is the proof for InetAddress class.

Technical Interview Tip: Client socket needs host + port.

Code Examples for InetAddress class

Example

import java.net.InetAddress;
public class Main {
  public static void main(String[] args) throws Exception {
    InetAddress local = InetAddress.getLocalHost();
    System.out.println(local.getHostName());
    System.out.println(local.getHostAddress());
  }
}

InetAddress class — prints local machine host name and IP — basic networking API.

How to Explain InetAddress class to an Interviewer

What is InetAddress class?

InetAddress class is a Java idea you should explain with one small example. Know the keyword / API used for InetAddress class. Type a tiny Main and print one result. For InetAddress class, say the output before you code.

Why do we use InetAddress class in Java?

Makes the program clearer or safer InetAddress class is a Java idea you should explain with one small example.

Write one small example of InetAddress class.

Show syntax Say what prints

What mistake do beginners make with InetAddress class?

Only the name, no example InetAddress class — only memorising the heading. No example, no trap.

Where is InetAddress class used in a real program?

Day-to-day Java code