Which of the following statements is not true?" Client computers are responsible for presenting data to the user and passing user input back to the server. The database and application functions are separate in the three tier model. In a typical two-tier client server system, the server handles both application and database duties in three-tier client server architecture, one tier is for user presentations, one is for database and applications, and the third is for internet access. Legacy systems are t advanced systems without a data warehouse. old manual systems that are still in place stable database systems after debugging flat file mainframe systems developed before client-server computing became standard