Computer Science for IGCSE & O level - Hardware (Section 9 - No. 23)
In a barcode system, what happens after a barcode is scanned at the checkout?
The price of the item is displayed.
The item is added to the customer's shopping cart.
The barcode reader looks up the stock item in the database.
The database is updated with the scanned item's details.
Giải thích
The text states that after a barcode is scanned, the barcode reader looks up the item's information in the database.