wp_js

What will be the output of the following code snippet?

const obj1 = {first: 20, second: 30, first: 50};

console.log(obj1);

• {first: 20, second: 30, first: 50}

• {first: 50, second: 30}

• {first: 20, second: 30}

• syntax error

What will be the output of the following code snippet?

print(typeof(NaN));

• None of the above

• String

• Number

• Object

What will be the output of the following code snippet?

const set = new Set();

set.add(5);

set.add('Hello');

set.add({ name: 'Scaler' });

for (let item of set)

{ console.log(item + 6); }

• 11 NaN NaN

• 11 Nan [object object]

• 11 Hello6 [object object]6

• None of the above

What will be the output of the following code snippet?

var a = true + true + true * 3; print(a)

• 3

• 0

• 5

• Error

When the switch statement matches the expression with the given labels, how is the comparison done?

• Only the value of the expression is compared.

• None of the above.

• Only the datatype of the expression is compared.

• Both the datatype and the result of the expression are compared.

Which of the following keywords is used to define a variable in Javascript?

• None of the above

• Both A and B

• let

• var

Which of the following methods can be used to display data in some form using Javascript?

• All of the above

• window.alert()

• console.log()

• document.write()

Which of the following function of the String object returns the character in the string starting at the specified position via the specified number of characters?

• 1. search( )

• 1. substr( )

• 1. split( )

• 1. slice( )

Which event occurs when the user clicks on an HTML element?

     

• onmouseover

• onmouseclick

• onchange

• onclick

What will be the output of the following code?
let a = 2;
if(a > 3) {
console.log('Yes');
} else {
console.log('No');
}

• Yes

• No

• Undefined

• Error