This Quiz contains totally 10 Questions each carry 1 point for you.
1. What keyword is used to check whether a given property is valid or not?
in
is in
exists
lies
Correct!
Wrong!
2. What is the use of the <noscript> tag in Javascript?
The contents are displayed by non-JS-based browsers.
Clears all the cookies and cache.
Both 1 & 2
None of these
Correct!
Wrong!
3. What will be the output of the following code snippet?
(function(){
setTimeout(()=> console.log(1),2000);
console.log(2);
setTimeout(()=> console.log(3),0);
console.log(4);
})();
1 2 3 4
2 3 4 1
2 4 3 1
4 3 2 1
Correct!
Wrong!
4. What will be the output of the following code snippet?
(function(a){
return (function(){
console.log(a);
a = 6;
})()
})(21);
21
6
NaN
None of the above
Correct!
Wrong!
5.What will be the output of the following code snippet?
function solve(arr, rotations){
if(rotations == 0) return arr;
for(let i = 0; i < rotations; i++){
let element = arr.pop();
arr.unshift(element);
}
return arr;
}
// solve([44, 1, 22, 111], 5);
[111, 44, 1, 22]
[44, 1, 22, 111]
[1, 22, 111, 44]
[22, 111, 44, 1]
Correct!
Wrong!
6. What will be the output for the following code snippet?
<p id="example"></p>
<script>
function Func()
{
document.getElementById("example").innerHTML=Math.sqrt(81);
}
</script>
9
81
0
error
Correct!
Wrong!
7. When an operator’s value is NULL, the typeof returned by the unary operator is:
Boolean
Undefined
Object
Integer
Correct!
Wrong!
8. What will be the output of the following code snippet?
var a = 1;
var b = 0;
while (a <= 3)
{
a++;
b += a * 2;
print(b);
}
4 10 18
1 2 3
1 4 7
None of these
Correct!
Wrong!
9. What does the Javascript “debugger” statement do?
It will debug all the errors in the program at runtime.
It acts as a breakpoint in a program.
It will debug error in the current statement if any.
All the above
Correct!
Wrong!
10. What will be the output of the following code snippet?
var a = Math.max();
var b = Math.min();
print(a);
print(b);
-Infinity Infinity
Infinity -Infinity
-Infinity -Infinity
Infinity Infinity
Correct!
Wrong!
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JavaScript-Quiz-2
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