What does setData(dataObject, callback) do, and what risk does a partial data object introduce?

What does setData(dataObject, callback) do, and what risk does a partial data object introduce?

• A. It reads data.
• B. It updates the canvas in real time.
• C. It triggers authentication.
• D. It sets metadata and overwrites; partial data leads to data loss.

Answer: (D)

This is about writing data into the current store. setData takes the dataObject you provide and updates the stored data (often triggering the callback when done). Because this operation replaces the existing data with what you supply, any fields not included in the dataObject can be overwritten or cleared. That means a partial data object can erase other information, leading to data loss. If you need to preserve existing fields, you’d typically merge the new values with what's already stored before saving.

This is about writing data into the current store. setData takes the dataObject you provide and updates the stored data (often triggering the callback when done). Because this operation replaces the existing data with what you supply, any fields not included in the dataObject can be overwritten or cleared. That means a partial data object can erase other information, leading to data loss. If you need to preserve existing fields, you’d typically merge the new values with what's already stored before saving.