JavaScript Socket Test – 1

1. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
function myFunction() 
{
   var str = "Hello World!"; 
   var patt1 = /\127/g;
   var result = str.match(patt1);
   if(result) 
  	result=true;
   else
  	result=false;
   document.getElementById("demo").innerHTML = result;
}
</script>

2. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
function myFunction() 
{
   var str = "100%!";
   var patt1 = /\W/g;
   var result = str.match(patt1);
   var result = str.match(patt1);
   if(result) 
  	result=true;
   else
  	result=false;
   document.getElementById("demo").innerHTML = result;
}
</script>

3. Which method is used to close the WebSocket?

4. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
function myFunction() 
{
   var str = "hello to \r world."; 
   var patt1 = /\v/;
   var result = str.search(patt1);
   document.getElementById("demo").innerHTML = result;
}
</script>

5. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
function myFunction() 
{
   var str = "Hello World!"; 
   var patt1 = /\x57/g;
   var result = str.match(patt1);
   if(result) 
  	result=true;
   else
  	result=false;

   document.getElementById("demo").innerHTML = result;
}
</script>

6. What does the following JavaScript code snippet do?

var httpserver = new http.Server();

7. What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
function myFunction() 
{
   var str = "Visit W3Schools. Hello World!"; 
   var patt1 = /\u0057/g;
   var result = str.match(patt1);
   var result = str.match(patt1);
   if(result) 
  	result=true;
   else
  	result=false;
   document.getElementById("demo").innerHTML = result;
}
</script>

8. What does the value 2 of the WebSocket attribute Socket.readyState indicate?

9. How does the client and the server communicate following the rules defined by the WebSocket protocol?

10. Which of the following is not a socket property?

11. Which of the following is not a WebSocket event?

12. Which of the following is a stateless protocol?

13. How can we check the subprotocol being used by the client?

14. How will you transmit data using the connection?

15. How many WebSocket events are available?