Which of the following is an example of CRUD operation?

CRUD operations refer to the fundamental functions performed on data in database management systems. The acronym stands for Create, Read, Update, and Delete. Each operation corresponds to a basic action that can be performed on records in a database.

"Update" specifically refers to modifying existing records within the database. This could involve changing values in fields of a record, such as updating a user's email address or changing a product's price. This action is essential in maintaining accurate and current information in data-driven applications.

The other choices do not align with the CRUD framework. "Download" implies retrieving data for use elsewhere, typically associated with the Read operation, but it is not itself a CRUD operation. "Display" suggests showing or visualizing data without modifying it, which again relates to reading rather than the core CRUD functions. "Apply" is vague in the context of data operations and does not pertain to Create, Read, Update, or Delete. Therefore, "Update" stands out as the clear example of a CRUD operation and highlights the importance of data maintenance in database management.