JavaScript Objective Questions

• Code: JavaScript
  /* start code */
  function getNum(x)
  {
  x += 3;
  if(x)
  return x;
  x *= 3;
  return x;
  }
  
  What will the above decalred function return when called like this getNum(4); ?
  
  a> 9
  b> 7
  c> 21
  d> 8
  
• Which company first implemented the JavaScript language?
  a> Netscape Communications Corp.
  b> Microsoft Corp.
  c> Sun Microsystems Corp.
  d> Consortium of the above companies
  
• When was the first release of a browser supporting JavaScript?
  a> 1994
  b> 1995
  c> 1996
  d> 1997
  
• The original name of JavaScript was
  a> JavaScript
  b> LiveScript
  c> WireScript
  d> ECMAScript
  
• The JavaScript international standard is called
  a> ECMA-262 Standard
  b> DHTML JavaScript Standard
  c> JavaScript 1.3 Standard
  d> ISO-262 Standard
  
• Which of the following statements best describes the relationship between JavaScript and DHTML?
  a> JavaScript is DHTML plus CSS plus Document Object Model.
  b> DHTML is Document Object Model plus JavaScript plus CSS.
  c> Document Object Model is JavaScript plus DHTML plus CSS.
  d> JavaScript has nothing to do with DHTML.
  
• What label catches all values except those specified in “switch” statement?
  a> otherwise
  b> default
  c> any
  d> all
  
• How do you locate the first X in a string txt?
  
  a> txt.find('X');
  b> txt.locate('X');
  c> txt.indexOf('X');
  d> txt.countTo('X');
  
• Which of these contains an executable statement?
  a> // var a = 0; // var b = 0;
  b> /* var a = 0; // var b = 0; */
  c> /* var a = 0; */ var b = 0;
  d> // var a = 0; /* var b = 0; */
  
• What does ++ operator do?
  a> Adds two numbers together
  b> Joins two text strings together
  c> Adds 1 to a number
  d> Adds 2 to a number
  
• Which of the following does not result in a variable going out of scope?
  a> End of the block in which it was defined
  b> Start of a block in which a like named variable is defined
  c> when a function is called
  d> when the program finishes running
  
• Which of these is not a logical operator?
  a> &&
  b> &
  c>
  d> !
  
• What does the following statment return, Math.floor(29.36); ?
  a> 30
  b> 29.5
  c> 29
  d> 29.4
  
• Code: JavaScript
  /* start code */
  var a = ["s","a","v","e"];
  document.write(a.join(""));
  
  What would be the output of the above code fragment?
  a> undefined
  b> save
  c> vase
  d> s
  
• /* start code */
  var a = 0;
  var b = 1;
  var c = a b;
  
  What does the variable c contain??
  a> 0
  b> true
  c> false
  d> null
  
• What would be the output of the follow statement, document.write("JavaScript ".length); ?
  a> 9
  b> 10
  c> 11
  d> null