Which of the following correctly creates an instance of a Car object using a constructor function?
A). var myCar = Car('Toyota', 'Corolla', 2020);
B). var myCar = new Car('Toyota', 'Corolla', 2020);
C). var myCar = create Car('Toyota', 'Corolla', 2020);
D). var myCar = construct Car('Toyota', 'Corolla', 2020);
How can you iterate over all properties of an object?
A). for (var key of object)
B). for (var key in object)
C). for (var key with object)
D). for (var key over object)
In JavaScript, what keyword is used to define a new object from a constructor function?
A). create
B). construct
C). new
D). object
Which of the following is a correct way to define an object using an object literal?
A). var car = {make: 'Toyota', model: 'Corolla'};
B). var car = make: 'Toyota', model: 'Corolla';
C). var car = new Object(make: 'Toyota', model: 'Corolla');
D). var car = Object.create(make: 'Toyota', model: 'Corolla');
What will car['make'] return if var car = {make: 'Ford', model: 'Mustang'};?
A). Ford
B). Mustang
C). Undefined
D). Error
What is the output of car.start() if var car = {start: function() {console.log('Car started');}};?
A). Car
B). started
C). Car started
D). Error
What will the following code output? console.log(car.make); if var car = {make: 'Honda', model: 'Civic'};
A). Honda
B). Civic
C). Undefined
D). Error
How do you define a method inside a class in JavaScript ES6?
A). methodName() {}
B). this.methodName = function() {}
C). function methodName() {}
D). methodName: function() {}
How do you add a new property to an existing object in JavaScript?
A). object.property = value;
B). object->property = value;
C). object:property = value;
D). object.addProperty('property', value);
What is encapsulation in the context of JavaScript objects?
A). Hiding the internal state and requiring all interaction to be performed through an object's methods
B). Extending one object from another
C). Creating a new object
D). Removing a property from an object