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

var string1 = ”123”;

var intvalue = 123;

alert( string1 + intvalue );

2. Guess the ternary operator used in the following example ?

marks = (mark<35)?"Fail":"Pass";

3. Initialization of variable can be done by writing ______________ operator in between variable name and operand value.

4. What will be the output of the following script ?

<script>

var x = 5;

document.write(x === "5");

</script>

5. Which of the operator is used to test if a particular property exists or not?

6. What will be the equivalent output of the following JavaScript code snippet?

x = ~-y;

w = x = y = z;

q = a?b:c?d:e?f:g;

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

function height()

{

var  height = 123.56;

var type = (height>=190) ? "tall" : "short";

return type;

}

8. What type of value gets printed if we add following two variables .

var a = "1";

var b = 5;

9. JavaScript contains a _________________ that assigns a value to a variable based on some condition.

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

var  obj=

{

length:20,

height:35,

}

if (‘breadth' in obj === false)

{

obj.breadth = 12;

}

 

console.log(obj.breadth);