Object Manipulation

Question 1

What is the difference between Object.freeze() and Object.seal()?

Answer 1

Object.freeze(obj): Prevents any changes (no adding, deleting, or modifying properties).
Object.seal(obj): Prevents adding/deleting properties, but allows modifying existing properties.

Question 2

What is Object.create() used for?

Answer 2

It creates a new object with the specified prototype.

Example: const person = { greet: () => console.log("Hello!") }; const student = Object.create(person); student.greet(); // "Hello!"

Question 3

Guess the output of the following code: const obj = Object.create(null); console.log(obj.toString);

Answer 3

undefined

Object.create(null) creates an object with no prototype, so it does not inherit toString from Object.prototype.