Suppose that sock refers to a TCP socket connected to another machine, and in is aScanner. Which code sends the string "Who is there?" to the other machine, receives the return answer, and then prints it?
A) PrintWriter pw = new PrintWriter(sock.getOutputStream().println("Who is there?"));
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine());
B) PrintWriter pw = new PrintWriter(sock.getInputStream());
pw.println("Who is there?");
pw.flush();
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine());
C) PrintWriter pw = new PrintWriter(sock.getOutputStream());
pw.flush("Who is there");
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine());
D) PrintWriter pw = new PrintWriter(sock.getOutputStream());
pw.println("Who is there?");
pw.flush();
InputStream instream = sock.getInputStream();
Scanner in = new Scanner(instream);
System.out.println(in.nextLine());

Question

Quizplus · Accepted Answer

The code correctly creates a PrintWriter to send data through the socket's output stream, sends the string, flushes the stream, and then uses a Scanner to read the response from the input stream.

Suppose That Sock Refers to a TCP Socket Connected to Another