Which mapping exists between the external and conceptual levels:

Related MCQs

• Which mapping exists between the conceptual and internal levels:
• Data Model is collection of conceptual tools for describing -
• Which is the transformation of requests and results between different levels of abstraction:
• The                            system is widely used for mapping from Java objects to relations.
• If an index is                                    the metadata and statistics continue to exists
• A deadlock exists in the system if and only if the wait-for graph contains a                        
• A deadlock exists in the system if and only if the wait for graph:
• The EXISTS keyword will be true if:
• A system is in a              state if there exists a set of transactions such that every transaction in the set is waiting for another transaction in the set.
• A(n) ____ lock exists when concurrent transactions are granted Read access on the basis of a common lock.