The goal of the three schema database architecture is to Oa. Separate the user applications from the physical database. O b. All the choices are correct. Oc. Divide the physical database into 3 components Od. Aid the database designer in designing the conceptual database
ER model is a type of data models. O a. conceptual O b. hierarchical O c. physical O d. implementation
Which is false? O a. O b. O c. Od. Database instance changes every time the database is updated. Data update is a database modification operation. Meta-data is the data about data. Database system is a collection of related data. Which is not a job of a DBA? O a. Authorizing access to the database Defining the database constraints O b. Oc. O d. Tuning the DBMS performance Acquiring software and hardware resources In the three-tier client-server architecture, which tier is for application server? O a. Web server O b. database system Oc. None of the choices are correct O d. Web browser