Answer to Question 1
A report is a database front-end component whose purpose is to present the data and calculations on the data from one or more tables from the database in a formatted way. Whereas the purpose of forms is to facilitate the interaction between the end users and the database by enabling users to engage in actions such as update and search, reports are used strictly for the retrieval of data. The data that is retrieved via reports is formatted and arranged in a professional and easy-to-view fashion, to be displayed on the screen or printed as a hard copy.
Answer to Question 2
Update failure is the failure of a database system during an update operation.
