Possible Answers

1. Arrays are initialized using the new operator and the Array() construct.
   

   var names = new Array();
   var marks = new Array();
   

2. Array values can be accessed using loops. The for is frequently used for this purpose.
3. Yes, array values can be changed.
4. JavaScript is a loosely typed language and allows for various data types in a single array.
5. 
   

   var n = new Array();
   var t = 10;
   for (var x = 0; x < 9; x++)
      {
      t = t * (x + 1);
      n[x] = t;
      }
   alert(n);