Question 1

What is the correct way to define an object "person" with properties "firstName", "lastName", and "age"?

Options :

A : const person = {firstName: 'Jane', lastName: 'Doe', age: 30};

B : const person = new Object('firstName' = 'Jane', 'lastName' = 'Doe', 'age' = 30);

C : const person = {'firstName': 'Jane', 'lastName': 'Doe', 'age': 30};

D : const person('firstName' = 'Jane', 'lastName' = 'Doe', 'age' = 30);

Answer: A

Question 2

What will be the value of result after the following code is executed?

var num1 = 10;

var num2 = 20;

var result = (num2 === 20) ? "yes" : "no";

Options :

A : 10

B : 20

C : "yes"

D : "no"

Answer: C

Question 3

In the following code snippet, what line of code should be inserted to declare a method named showInfo that outputs the string "Hi" to the console?

class A {

// insert code here

}

let a = new A();

console.log(a.showInfo());

Options :

A : let showInfo = function() { console.log("Hi"); }

B : showInfo = function() { return "Hi"; }

C : showInfo() { return "Hi"; }

D : function showInfo() { return "Hi"; }

Answer: B

Question 4

What is the correct output of the following code:

var obj = {

value: 10

};

var foo = function() {

console.log(this.value);

};

var bar = function() {

console.log(this.value);

};

var boundFoo = foo.call(obj);

var boundBar = bar.bind(obj)();

console.log(boundFoo === boundBar);

Options :

A : 10 10 false

B : 10 undefined false

C : 10 10 true

D : undefined 10 false

Answer: C

Question 5

What line of code should be inserted into the Product class definition to add a property price to the class?

class Product {

constructor(name)

{

this.name = name;

// insert code here

}

Options :

A : price: 0;

B : this.price = 0;

C : var price = 0;

D : let price = 0;

Answer: B