Q
What is the output of the following code snippet?

Answer & Solution

Answer: Option A
Solution:
javascript const point = { x: 10, y: 20 }; point.y = 10; console.log(point); The code modifies the y property of the point object to 10, resulting in { x: 10, y: 10 }.
Related Questions on Average

What is the output of the following code snippet?

A). A. { a: 1, b: 2, c: 3 }

B). B. { a: 1, b: 2 }

C). C. { c: 3 }

D). D. Error

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

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

A). A. Use Object.preventExtensions()

B). B. Use const for each property

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

D). D. All of the above

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

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 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 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 data type of a constant object in JavaScript?

A). A. Object

B). B. Array

C). C. Function

D). D. String

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

Which of the following will cause an error when used with a constant object in JavaScript?

A). A. Modifying a property using bracket notation

B). B. Adding a property using dot notation

C). C. Deleting a property

D). D. Reassigning the object reference