DataSource and Editing

1. What action must be taken if the `ModelState` is not valid when updating data using the Kendo DataSource?

Throw an exception Return Json with ModelState errors Ignore the invalid state Continue with the save operation

2. Which editing mode allows users to edit many cells and sync all changes with a single Save button in Kendo's grid?

Inline Popup Batch/InCell Readonly

3. In Kendo's DataSource configuration, why is it essential to define the model's identity with `m.Id(...)`?

To enable inline editing To ensure proper client-side validation To prevent data duplication on updates To configure custom templates

4. What must be included in the update payload to handle concurrency in a Kendo grid effectively?

User ID Timestamp/rowversion Client-side validations Error handlers