Salesforce JavaScript Developer Practice Exam 2026 – Your All-in-One Guide to Exam Success!

When you use `Object.seal(emp)`, it prevents the addition of new properties to the object and marks all existing properties as non-configurable. This means that existing properties cannot be deleted or redefined.

In this case, since the `name` property already exists on the `emp` object and you attempt to delete it after sealing the object, the `delete emp.name` statement will have no effect. The `name` property remains unchanged because sealing the object has made it non-configurable, thus preventing its deletion.

This behavior highlights the purpose of the `Object.seal()` method, which is to allow the existing properties to be modified if they are writable, but to protect the structure of the object itself by disallowing any deletions or additions.