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Total 160 Questions | Updated On: Nov 21, 2024

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Question 1

What is the output of the following code snippet?

class Shape{};

class Pyramid extends Shape{};

class SquareBasedPyramid extends Pyramid {};

let shape = new SquareBasedPyramid ();

console.log(`${shapeinstance of Shape} ${shape instance of Pyramid } ${shape instance of SquareBasedPyramid }`)

A : true true true

B : false false true

C : true false true

D : false false false

Answer: A

Question 2

What is the value of property "y" in object "point2" after the following code is executed?

let point = {x: 100, y: 200};

let point2 = {...point};

point2.y = 300;

A : undefined

B : 100

C : 300

D : 200

Answer: C

Question 3

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

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 4

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());

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

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

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

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

Answer: B

Question 5

The shape object can be converted to JSON format using the built-in command:

A : JSON.parse(shape);

B : JSON.stringify(shape);

C : JSON(shape);

D : shape.toJSON();

Answer: B

Page: 1 / 32

Total 160 Questions | Updated On: Nov 21, 2024

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