JavaScript 1000+ MCQ with answer for SSC Scientific Assistant

var grade='E';
var result;
switch(grade)
{
case 'A':
result+=10;
case 'B':
result+= 9;
case 'C':
result+= 8;
default:
result+= 0;
}
document.write(result);

int sum=0;
var arr = [10,15,20,30];
arr.forEach(function myFunction(element)
{
sum= sum+element;
});
document.writeln(sum);

var pow=new Function(num1,num2,return Math.pow(num1,num2));
document.writeln(pow(2,3));

function f() {};

<script>
document.getElementById("demo").innerHTML = typeof "John"
</script>

<script>
var x = 10;
x *= 5;
document.getElementById("demo").innerHTML = x;
</script>

var add=new Function(num1,num2,return num1+num2);
document.writeln(add(2,5));

var count = 0;
while (count < 10)
{
console.log(count);
count++;
}

int a=4;
int b=1;
int c=0;
If(a==b)
document.write(a);
else if(a==c)
document.write(a);
else
document.write(c);

var a=3.7;
var b=2;
a=ciel(a)
document.writeIn(a*b);

switch(expression)
{
statements
}

function f(o)
{
if (o === undefined) debugger;
}

function printArray(a)
{
var len = a.length, i = 0;
if (len == 0)
console.log(Empty Array);
else
{
do
{
console.log(a[i]);
} while (++i < len);
}
}

function range(int length)
{
int a=5;
for(int i=0;i<length;i++)
{
console.log(a);
}
}
range(3);

var obj=
{
length:20,
height:35,
}
if (breadth' in obj === false)
{
obj.breadth = 12;
}
console.log(obj.breadth);

var values=[1,2,3,4]
var ans=values.slice(1);
document.writeln(ans);

for(var num=10;num>=1;num--)
{
document.writeln(num);
}

var num=10;
while(num>=1)
{
document.writeln(num);
num++;
}

const object1 = {
property1: 20
};
console.log(Object.is(object1));

const obj1 =
{
property1: 21
}
const descriptor1 = Object.getOwnPropertyDescriptor(obj1, 'property1');
console.log(descriptor1.configurable);
console.log(descriptor1.enumerable);

for(var p in o)
console.log(o[p]);

var grand_Total=eval(10*10+5);

var count = [1,,3];

function compare()
{
int num=2;
char b=2;
if(a==b)
return true;
else
return false;
}

var count = 0;
while (count < 10)
{
console.log(count);
count++;
}

var tensquared = (function(x) {return x*x;}(10));