<!--This is a comment-->
//This is a comment
'This is a comment
#This is a comment
var
let
static
public
document. write()
console.log()
window. alert()
innerHTML
/* This is a comment */
Both A and C
jscript.write("Sky is blue")
document.write("Sky is blue")
print("Sky is blue")
jscript.print("Sky is blue")
22
4
2
syntax error
What will be the output?
console.log(true + true);
0
1
Error
=
==
===
!=
document.getElementById()
variable carName;
var carName;
vari carName;
dim carName;
Volatile variable
Mutable variable
Immutable variable
Dynamic variable
var defines a variable while let defines a constant.
There is no such major difference between them
The value of variable declared with let cannot be changed
var define function scoped variable while let define block scoped variable
Displays a message in an alert box
Prints output to the console
Writes data to a file
Logs an error in the browser console
keyword
function
Declaration Statement
Data type
What is the output?
console.log(2+"2"*2);
44
12
6
x
*
Division by zero
Missing of semicolons
Syntax error
Both A and B
There is no such major difference between them.
The value of a variable declared with var can be changed while the value of a variable declared with let cannot be changed.
var defined function scoped variable while let define block scoped variable.
console.log("5" + 2);
7
52
Undefined
if(a!=null)
if (!a)
if(a!null)
if(a!==null)
/
%
^
Display()
Prompt()
Alert()
Confirm()
Prints an exception error
Prints an overflow error
Displays “Infinity”
Prints the value as such
::
?:
??
=>
5myvalue
myvalue5
Myvalue
None of These
const
none of the above