Week 10.2

What is the value of "elem" variable?

var elem;
if ( 11 == 11 && 12 < 10 ){
elem = 12;
}else {
elem = 'undefined';
}

• undefined

• 12

• 11

• 10

What is the purpose of the value null in JavaScript?

• To indicate a variable has not been assigned any value.

• To represent an error in a mathematical operation.

• To represent an nonexistent value or object

• To indicate an empty string or absence of a value.

What is displayed on the browser?

function myFunction(){

document.write(myFunction === myFunction);

}

myFunction();

• true

• false

• undefined

• null

What is the result?

Number("1") - 1 == 0;

• true

• false

• undefined

• null

What is the result?

(true + false) > 2 + true

• true

• false

• undefined

• null

what is the value of

var x = 3;

var obj ={

x:2,

y: {x:1, y: 2},

}

document.write(obj.y.x);

• 1

• 2

• 3

What is the value of

var x = 3;

var obj ={

x:2,

y: function(){

return this.x},

}

alert(obj.y())

• 1

• 2

• 3

What is the value of

• var arr=["AngularJS","Node.js","JQuery","Bootstrap"]  

• var result=arr.slice(1,2);  

• document.write(result);  

• Angular JS

• Node.js

• JQuery, Bootstrap

• Angular JS, Node.js

What is the value of

var arr=["AngularJS","Node.js","JQuery","Bootstrap"]

var result=arr.slice(0);

document.writeln(result)

• undefined

• 0

• AngularJS

• AngularJS,Node.js,JQuery,Bootstrap

What is the value of

var fruits = ["A", "D", "F", "B"];

fruits.reverse();

alert(fruits)

• A,B,D,F

• B,F,D,A

• null

• undefined