11. The system's performance is low in terms of failing to respond quickly enough to meet the stated user requirement of interactive, screen-based use that has been identified as a problem during the testing process in the development of a new system Which of the following is NOT identified the problem from that stage in the life cycle of database system development? A implementation stage - identify actual performance B. design stage - attempts at performance prediction C. testing stage - validate database development and design predictions D. requirements collection and analysis stage - identify the user requirements 12. There are three main phases of database design, at what phase does the identification of important entities, relationships and attributes is carried out? A. Conceptual database design B. Logical database design C. Physical database design D. Management database design 13. Which of the following is specifics the number of instances of one entity that can or must be associated with each instance of another? A. Cardinality constraint B. Entity instance C. Associative entity D. Multi-valued attribute 14. The attribute name could be structured as an attribute consisting of first name, middle initial, and last name. This type of attribute is called? A Simple attribute B. Composite attribute C. Multivalued attribute D. Derived attribute