Sounds like you are asking for answers to a homework question.

Use GOOGLE to search for your answers. If you do, the following are typical of the answers you will find.

1). A view is a virtual table that consists of columns from one or more tables. Though it is similar to a table, it is not stored in the database.

2). Functions are computed values and cannot perform permanent environmental changes to SQL Server (i.e. no INSERT or UPDATE statements allowed).