What is the correct way to create an empty object...
A). var obj = {};
B). var obj = ();
C). var obj = [];
D). var obj = <{}>;
What will console.log(obj.toString()) output?
A). The string representation of...
B). The object itself.
C). An error.
D). 1
What is the purpose of the 'this' keyword in a co...
A). It refers to the new object bei...
B). It refers to the global object.
C). It refers to the current object.
D). It refers to the parent object.
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...
What does the Object.values(obj) method return?
A). An array of object keys.
B). An array of object values.
C). An array of object properties.
D). An array of object methods.
What does Object.keys(obj) return?
A). An array of object keys.
B). An array of object values.
C). An array of object properties.
D). An array of object methods.
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.
How can you remove a property 'email' from an obj...
A). delete user.email;
B). user.remove('email');
C). user.email = null;
D). user.pop('email');
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 inherit properties and methods from a...
A). class SubClass extends SuperClas...
B). class SubClass inherits SuperCla...
C). class SubClass implements Super...
D). class SubClass derives SuperCla...