How many properties are there in the PerformanceTiming interface?

Which of the following is an interface?

What is the maximum number of global symbols that can be defined by a module?

What does a minified JavaScript file return?

Which of the following keyboard modifier keys are not set to true when held down?

In order to skip or seek to the desired location in a sound or video, which property becomes helpful? 

When does the mouseover event occur?

What is the purpose of the Block tab in a web browser or network tool?

When do uncaught exceptions generate events?

What will be the output of the following JavaScript code?

<p id="demo"></p>
<script>
function myFunction()
{
  var str = "Is this all there is?";
  var patt1 = /\s/g;
  var result = str.match(patt1);
  if(result)
  result=true;
  else
  result=false;
  document.getElementById("demo").innerHTML = result;
}
</script>