What is the purpose of the "this" keyword in a co...

What is the output of console.log(obj.prop) if ob...

A). It prints undefined.

B). It throws an error.

C). It prints null.

D). It prints true.

How do you iterate over all properties of an obj...

A). for (var prop in person)

B). forEach(prop in person)

C). for (var prop of person)

D). forEach(prop of person)

How do you create an instance of the 'Car' objec...

A). var myCar = new Car('Toyota', ...

B). var myCar = Car('Toyota', 'Corol...

C). var myCar = create Car('Toyota',...

D). var myCar = construct Car('Toyo...

How do you add a method to an object created wit...

A). this.methodName = function() {}

B). this.methodName: function() {};

C). this.methodName = () {}

D). this.methodName: () {}

How do you get the number of properties in an obj...

A). Object.keys(book).length

B). book.countProperties()

C). book.totalProperties()

D). book.length()

How do you access nested properties in an object?

A). obj.property.nestedProp (B21)

B). obj['property']['nestedProp'] (C21)

C). obj.property['nestedProp'] (D21)

D). obj['property'].nestedProp (E21)

What is the correct way to create an empty object...

A). var obj = {};

B). var obj = ();

C). var obj = [];

D). var obj = <{}>;

What happens if you access a non-existent property...

A). It returns undefined.

B). It throws an error.

C). It returns null.

D). It returns true.

What is the purpose of the 'super' keyword in a ...

A). It calls methods from the paren...

B). It creates a new instance of the...

C). It refers to the current object.

D). It checks for property existence.

How do you access a property called 'name' from an...

A). person.name

B). person['name']

C). person->name

D). person::name