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JavaScript - Quiz(MCQ)
1 .
How to write an IF statement in JavaScript?
A)
if i = 5
B)
if (i == 5)
C)
if i = 5 then
D)
if i == 5 then

Correct Answer : Option (B) :  

if (i == 5)

2 .
How to write an IF statement for executing some code if "i" is NOT equal to 5?
A)
if (i <> 5)
B)
if i <> 5
C)
if i =! 5 then
D)
if (i != 5)

Correct Answer : Option (D) :  

if (i != 5)

3 .
How does a WHILE loop start?
A)
while (i <= 10)
B)
while i = 1 to 10
C)
while (i <= 10; i++)
D)
None of the above.

Correct Answer : Option (A) :  

while (i <= 10)

4 .
How does a FOR loop start?
A)
for i = 1 to 5
B)
for (i <= 5; i++)
C)
for (i = 0; i <= 5)
D)
for (i = 0; i <= 5; i++)

Correct Answer : Option (D) :  

for (i = 0; i <= 5; i++)

5 .
Which of these is a correct method to create a new array?
A)
var myArray = ();
B)
var myArray = [];
C)
var myArray = {};
D)
var myArray = array();

Correct Answer : Option (B) :  

var myArray = [];

6 .
How to append a value to an array of Java Script?
A)
arr[arr.length] = value
B)
arr[arr.length+1] = new Arrays()
C)
arr[arr.length-1] = value
D)
arr[arr.length*1] = value

Correct Answer : Option (A) :  

arr[arr.length] = value

7 .
How to return the first value of this array?
var myArr = [1, 2, 3, 4, 5];
A)
myArr[0];
B)
myArr(1);
C)
myArr[1];
D)
myArr(0);

Correct Answer : Option (A) :  

myArr[0];

8 .
Which is the correct way to write a JavaScript array?
A)
var txt = new Array(1:"abc",2:"efg",3:"xyz")
B)
var txt = new Array:1=(" abc ")2=("efg")3=("xyz")
C)
var txt = new Array("abc","efg","xyz")
D)
var txt = new Array=" abc ","efg","xyz"

Correct Answer : Option (C) :  

var txt = new Array("abc","efg","xyz")

9 .
Which event occurs when the user clicks on an HTML element?
A)
onmouseclick
B)
onmouseover
C)
onclick
D)
onchange

Correct Answer : Option (C) :  

onclick

10 .
Which of the following is the tainted property of a window object in Java Script?
A)
Pathname
B)
Protocol
C)
Defaultstatus
D)
Host

Correct Answer : Option (C) :  

Defaultstatus