Salesforce JavaScript Developer Practice Exam

What is the expected output of the code that attempts to log an imported value that cannot be reassigned?

1. Output is the assigned value.

2. An error message indicating a read-only property.

3. undefined because reassignment fails silently.

4. A console warning about variable scope.

The correct answer is: An error message indicating a read-only property.

When attempting to log an imported value that cannot be reassigned, the expected output is an error message indicating a read-only property. In JavaScript, when a value is imported from a module, it is treated as a read-only reference. This means that trying to reshape or reassign that imported value will result in an attempt to change something that is immutable in that context. The nature of imported values protects them from reassignment, so if the code includes something like `import { value } from './module'; value = newValue;`, it will trigger an error. This behavior ensures the integrity and consistency of modules in JavaScript, leading to predictable outcomes during execution. Thus, logging an attempted reassignment triggers a runtime error that clearly communicates that the property cannot be altered.