Super 15 MERN Stack

What will be the output of the following code

console.log( true && false)

console.log( true || false)

• • true true

• • false true

• • false false

• • true false

What will be the output of the following code?

console.log( "string" ? true : false)

console.log( "" ? true : false)

• • true true

• • true false

• • string true

• • string false

What will be the output of the following code?

console.log( 0 ? true : false)

console.log("0" ? true : false)

• • true false

• • 0 ""

• • true true

• • false true

How to include a javascript file in an HTML file?

• • via script tag

• • via include tag

• • via import tag

• • None of the above

What will be printed on the console

console.log(parseInt("123xyz"))

• • 123xyz

• • NaN

• • 0

• • 123

What will be printed on the console

console.log(parseInt("A123xyz"))

• • A123xyz

• • NaN

• • 0

• • 123

How to take values as input from user?

• • window.alert()

• • window.prompt()

• • window.confirm()

• • window.input()

What will be printed in the console.

var input = 7;

var output1 = ++input + ++input + ++input; 

var output2 = input++ + input++ + input++;

var output3 = input++ + ++input + input++;

console.log(output1 + ' ' + output2 + ' ' + output3);

• • 27 33 43

• • 27 35 43

• • 27 33 45

• • None of the above

What will be printed on the console?

var a = 10;

var b = 5;

var c = 12; 

var e = 8;

var d;

d = parseInt((a (c - b) / e + (b + c)) <= (e (c + a) / (b + c) + a));

console.log(d);

if (d == 1){

console.log(parseInt((a * (c - b) / e + (b + c))));

} else {

console.log(parseInt((e * (c + a) / (b + c) + a)));

}

• • NaN and 25

• • 24 and NaN

• • NaN and 20

• • None of the above

What will be printed on the console?

var valA = "true";

var valB = "false";

var valC = true;

var valD = false;

console.log(!!valA == !!valB)

console.log(!!valC == !!valD)

• • false and true

• • true and false

• • false and false

• • true and true