Quiz on Socket Programming in Java

Which of the following is the correct syntax for socket connection ?

class Program {

public static void main ( String args [ ] )

{

Socket socket;

DataInputStream input;

DataOutputStream output;

input = DataInputStream (System.in);

Program {

Socket socket = new Socket(“127.0.0.1”, 5000);

System.out.println(“Established”);

}

Program p = new Program();

}

}

The given program is an example of which type of Socket programming ?

Which of the following is the correct syntax to accept a socket connection ?

Which of the following is not used in a socket connection ?

class Message {

public static void main ( String args [ ] )

{

String servername = “servername”;

int port = portnumber;

Socket client = new Socket(servername,portnumber);

OutputStream out = client.getOutputStream();

DataOutputStream stream = new DataOutputStream(out);

stream.write(“Message for client”);

InputStream in = client.getInputStream();

DataInputStream input = new DataInputStream(in);

System.out.println(in.ReadUTF()):

client.close();

}

}

What is the output of the program ?

class Exception {

public static void main ( String args [ ] )

{

void Connection()
    {

Socket socket = new Socket(5021,”126.4.3.1”);

System.out.println(“Connection is established”);

}

}

}

What is the error in the program ?

Which of the following methods are used to send the data through the data Stream ?

class Function {

public void method(String Address, double Port)

{

Socket socket = new Socket();

DataInputStream input = new DataInputStream();

System.out.println(Address,Port);

}

class Main {

public static void main ( String args [ ] )

{

Function f = new Function();

f.method(“127.1.1.9”,8765);

}

}

What is the output of the program ?

class Example {

public static void main ( String args [ ] )

{

    throws IOException {

    Socket socket = new Socket(3278);

InputStream input = socket.InputStream();

DataInputStream in = new DataInputStream(input);

input.close();

in.close();

socket.close();

catch(UnknownHostException exception)

{ 

System.out.println(exception)

}

}

What is the output of the program ?

Which of the following is used to close the socket connection ?

class SimpleClient {

public static void main ( String args [ ] )

{

    throws IOException {

    Socket socket = new Socket(“host”,3278);

InputStream input = socket.InputStream();

DataInputStream in = new DataInputStream(input);

String string = new String(in.ReadUTF());

System.out.println(string);

input.close();

in.close();

socket.close();

}

}

What is the output of the program ?

class Main {

public static void main ( String args [ ] )

{

Address host = Address.getLocalHost();

        Socket socket = null;

        ObjectOutputStream out = null;

        ObjectInputStream in = null;

        for(int i=0; i<3;i++){

            socket = new Socket(host.getHostName(), 4357);

            oos = new ObjectOutputStream(socket.getOutputStream());

            System.out.println(“Server request sent”);

            if(i==2)out.writeObject(“exit”);

            else out.writeObject(“”+i);

            in = new ObjectInputStream(socket.getInputStream());

            String message = (String) ois.readObject();

            System.out.println(“Message: ” + message);

      in.close();

            out.close();

        }

    }

What is the function of the given program ?

 Which of the following classes are used for socket programming in java ?

 class SocketProgramming {

public static void main ( String args [ ] )

{

String servername = “126.9.0.3”;

int port = 4531;

Socket client = new Socket(servername,portnumber);

OutputStream out = client.getOutputStream();

DataOutputStream stream = new DataOutputStream(out);

System.out.println(stream.write(“welcome client”);

InputStream in = client.getInputStream();

DataInputStream input = new DataInputStream(in);

System.out.println(in.ReadUTF()):

client.close();

}

}

What is the error in the program ?

class Client {

public static void main ( String args [ ] )

{

long port;

String address;

public void method ( address , port )

{

Socket socket = new Socket( address , port );

System.out.println(“Connection is established in this “ + address + “ using this “ + port “);

}

method(“130.0.0.2”,4329);

}

}

What is the output of the program ?