JavaScript Question

Javascript

1) Find suboptimal code in the following snippet:
 
for (var i = 0; i < 100; i++) {
  $("#list").append(i + ", ");
};

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2) What is the result of the following code snippet:

var a=1;
function inc(x) {
 x++;
 x-=2;
}
console.log(inc(a))

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3) What is the result of the following code snippet:

var a={x:1};
function incX(a) {
 a.x++;
 a.x-=2;
}
incX(a)
console.log(a.x)

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4) What is the result of the following code snippet:

var a=1;
function inc(a) {
 a++;
 a-=2;
}
inc(a)
console.log(a)

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5) What is the result of the following code snippet:

var a = 10;
function incA() {
    a++;
}
incA();
console.log(a);

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6) For given part of HTML:

<div id="test" class="red">TEST</div>

and CSS:

#test{
  color:blue;
}
.red {
  color: red;
}

what will be the final color of TEST text?

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7) What is the result of the following code snippet if code is run in any browser:

function logThis() {
        console.log(this)
}

logThis();

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8) What is the result of the following code snippet if the code is executed in any browser:

function logThis() {
        console.log(this)
}

var a = {logThis:logThis}

a.logThis();

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9) What has to be the value of a so that the value of b is false?

var b = a===a; 

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10) What is the result of the following code snippet:

var a = 1;

var b = true || a++;

console.log(a);

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11) What is the result of the following code snippet:

var a = 1;

var b = true && a++;

console.log(a);

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