Congratulations - You have completed JavaScript : MCQ.

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Question 1
Which of the following is not a compound assignment operator.
A
>>=
B
===
C
<<=
D
+=
Question 1 Explanation: 
Compound assignment operators exist for each of the major mathematical operations
Question 2
If a string cannot be converted to a number __________ will be returned.
A
Zero
B
Null
C
Infinite
D
NaN
Question 2 Explanation: 
NaN stands for Not A Number.
Question 3
If the values on either side of '+' operator are numerical values then ___________.
A
values are added together
B
None of These
C
values are concatenated together.
Question 4
<html>
    <head>
        <title>A Simple Page</title>
        <script language="JavaScript">
            <!--
            var A = "Compile ",
                B = "Error";
            C = A + B;
            alert(C);
            //  -->
        </script>
    </head>
    <body></body>
</html>
What will be printed ?
A
Nothing will be printed
B
"Compile Error" will be printed
C
None of these
Question 5
var str = "Str";
var num = 10;
var output = str + num;
What will be the value of Variable 'output' ?
A
Null
B
NaN
C
Nothing will be printed
D
Str10
Question 5 Explanation: 
String + Number = String
Question 6
What will be printed on the screen ?
A
1001020
B
10030
C
100101010
D
130
Question 6 Explanation: 
String + Number = String
Question 7
During addition of two numbers , suppose one of the number is NaN then output of the following code will be ?
A
Zero
B
Null
C
NaN
D
Infinite
Question 7 Explanation: 
NaN + Any Value = NaN
Question 8
+Infinity in JS gets added with +Infinity then output of the code will be -
A
+Infinity
B
-Infinity
C
NaN
Question 8 Explanation: 
+Infinity + +Infinity = +Infinity
Question 9
-Infinity in JS gets added with -Infinity then output of the code will be -
A
NaN
B
+Infinity
C
-Infinity
Question 9 Explanation: 
-Infinity + -Infinity = -Infinity
Question 10
-Infinity in JS gets added with +Infinity then output of the code will be -
A
+Infinity
B
-Infinity
C
NaN
Question 10 Explanation: 
+Infinity + -Infinity = NaN
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