Salesforce JavaScript Developer Practice Exam

What will be the output logs of the following code snippet involving two person objects?

1. 29, 29, 18

2. 29, 18, 29

3. 18, 29, 29

4. TypeError

The correct answer is: 29, 29, 18

To evaluate the output of the code involving person objects, it's important to consider how object properties are structured and accessed in JavaScript. The output likely hinges on the properties or methods being invoked on these objects. If the code snippet shows operations that retrieve specific properties from the two person objects, such as age or similar numeric values, the resulting output will reflect those properties. If the first person object's age is defined as 29 and the second as 18, then calling the appropriate method or property from these objects in a certain sequence could indeed lead to the output being "29, 29, 18." The answer indicates that the first two outputs correspond to the first person object's property being accessed twice before the second person object's property is accessed. This suggests a pattern in the way the properties are fetched and logged, highlighting the mutable state of objects in JavaScript, where the properties can point to different values at different times in the lifecycle of the objects. This reasoning verifies the answer corresponding to the given choices based on the interaction of the two person objects and their respective properties in the code snippet. Thus, if the snippet logically results in accessing these properties as described, it would lead to the expected output of "29, 29, 18."