Week 10.1

Which JavaScript operator is used to determine the type of a variable?

• typeof

• TypeOf

• typeOf

• sizeof

What will be the output of the following JavaScript code?

var x = 12.34;
	document.write(typeof(x));

• int

• float

• long

• number

Which keyword is used to define a JavaScript function?

• module

• fun

• func

• function

In JavaScript a variable contains one value while an object may contain ___.

• One value

• Two values

• Three values

• Many values

Which is the correct syntax to access an object property in JavaScript?

More than one answer

• objName:propertyName

• objName.propertyName

• objName["propertyName"]

What will be the output of the following JavaScript code?

var str = "JavaScript is Fun";
	document.write(str.length);

• 15

• 16

• 17

• 18

What will be the output of the following JavaScript code?

var x = "JavaScript is Fun";
    document.write(x.slice(-7,-4));

• JavaScript

• is

• Fun

• Script

What will be the output of the following JavaScript code?

var cars = ['Honda', 'Hyundai'];
    cars.push('Mahindra');
    document.write(typeof cars + " " + cars);

• array Honda,Hyundai,Mahindra

• string Honda,Hyundai,Mahindra

• object Honda,Hyundai,Mahindra

• object "Honda", "Hyundai", "Mahindra"

What will be the output of the following JavaScript code?

var msgs=["Hello","Hey","Morning!"];  
	for (i=0;i<msgs.length;i++){  
		document.write(msgs[i] + " | ");  
	}

• Hello | Hey |

• Hello | Hey | Morning! |

• ValueError

What will be the output of the following JavaScript code?

var values = [10, 20, 30];
	var result = values.map(myFunction);

	document.write("Result: ", result);

	function myFunction(value, index, array) {
	  return value * value;
	}

• Result: 10,20,30

• Result: 10*10,20*20,30*30

• Result: 100,400,900

• ValueError