How can you prevent modifications to the properties of a JavaScript object?

What happens if you try to delete a property from a constant object in JavaScript?

A). A. The property is deleted successfully

B). B. A TypeError is thrown

C). C. A SyntaxError is thrown

D). D. Nothing happens

What is the data type of a constant object in JavaScript?

A). A. Object

B). B. Array

C). C. Function

D). D. String

What does the const keyword do when used to declare an object in JavaScript?

A). A. Makes the object immutable

B). B. Prevents reassignment of the object reference

C). C. Freezes all properties of the object

D). D. All of the above

What is the correct way to modify a property of a constant object in JavaScript?

A). A. Use the delete keyword

B). B. Use the const keyword for the property

C). C. Use dot notation or bracket notation to access and modify the property

D). D. Use Object.freeze() to freeze the object

What is the output of the following code snippet?

A). A. { x: 10, y: 20 }

B). B. { x: 20, y: 10 }

C). C. { x: 10 }

D). D. Error

What happens if you try to modify a property of a frozen object in JavaScript using Object.freeze()?

A). A. The property is modified successfully

B). B. A TypeError is thrown

C). C. The property is deleted

D). D. The object becomes mutable

What is the result of the expression Object.keys(person).length for the following code snippet?

A). A. 1

B). B. 2

C). C. 3

D). D. Error

How can you ensure that a constant object remains unchanged in JavaScript?

A). A. Use Object.preventExtensions()

B). B. Use Object.freeze() to freeze the object

C). C. Use const for each property

D). D. All of the above

Which statement is true about constant objects in JavaScript?

A). A. The properties of a constant object cannot be changed

B). B. Constant objects are frozen and immutable

C). C. Constant objects cannot have properties added or deleted

D). D. The object reference can be reassigned

How can you change the properties of a constant object in JavaScript?

A). A. Use Object.freeze()

B). B. Use const for each property

C). C. Use the delete keyword to remove properties

D). D. Use dot notation or bracket notation