What happens if you try to reassign a constant object to a new object in JavaScript?

Which of the following will result in an error when using a constant object in JavaScript?

A). A. Modifying an existing property

B). B. Adding a new property

C). C. Reassigning the object reference

D). D. None, all operations are valid with constant objects

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

What happens if you use Object.freeze() on a constant object in JavaScript?

A). A. The object reference becomes mutable

B). B. The properties of the object become immutable

C). C. The object becomes frozen and cannot be modified

D). D. A TypeError is thrown

Which statement best describes the behavior of a constant object in JavaScript?

A). A. The object and its properties cannot be changed

B). B. The object reference cannot be reassigned

C). C. All properties are immutable

D). D. The object cannot be modified after declaration

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

Which of the following is a valid way to define a constant object in JavaScript?

A). A. const obj = { a: 1, b: 2 };

B). B. const obj = new Object({ a: 1, b: 2 });

C). C. Both A and B

D). D. None 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

Which statement about constant objects in JavaScript is correct?

A). A. Constant objects can have their properties reassigned

B). B. Constant objects cannot have properties added or removed

C). C. Constant objects are only applicable to primitive values

D). D. Constant objects are mutable

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

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

A). A. Object

B). B. Array

C). C. Function

D). D. String