Quiz on Sample Code - JavaScript

What will be the output of the following JavaScript code?

<p id="demo"></p>

var txt1 = "St'Joseph's_";

var txt2 = "IT";

document.getElementById("demo").innerHTML = txt1 + txt2;

• error

• St'Joseph's_ IT

• undefined

• St'Joseph's_IT

What will be the output of the following JavaScript code?

<p id="demo">

</p> <script>

var js = 10;

js *= 5;

document.getElementById("demo").innerHTML = js;

</script>

• 10

• 50

• 5

• Error

Will the following JavaScript code work?

var js = (function(x) {return x*x;}(10));

• Exception will be thrown

• Memory leak

• Error

• Yes, perfectly

What will be the output of the following JavaScript code snippet?

int a=1;

if(a!=null) // JavaScript not equal to Operators

return 1;

else

return 0;

• 0

• 1

• Compiler Error

• Runtime Error

What will be the output of the following JavaScript code?

function height()

{

var height = 123.56;

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

return type;

}

• short

• 123.56

• tall

• 190

What will be the output of the following JavaScript function?

<p id="demo">

</p> <script>

function javascript()

{

// javacript abs() method

document.getElementById("demo").innerHTML = Math.abs(-7.25);

}

</script>

• -7.25

• 7.25

• -7

• 7