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Explain in detail about Collaboration Diagrams
Collaboration diagrams are interaction diagrams which emphasize structural organisation of an object that transmit and receive messages. There is always a path in collaboration diagrams which indicate how one object is linked to other and sequence numbers to show the time ordering of a message. The notation for depiction of a collaboration diagram is as:
Figure: Collaboration diagram
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
Difference between LEFT OUTER JOIN and RIGHT OUTER JOIN In left outer join tuples from the left-hand-side relation which do not match any tuple in the right-hand-side relation
explain participation constraints with examples
What is conceptual model ? A conceptual model is a independent of both hardware and software.
Explain the Deferred Update The deferred update methods do not physically update the database on disk till after a transaction reaches its commit point; after that the updates
Explain the ISA relationship Answer: ISA relationship - ISA notation is employed in generalization/ specialization to depict relationship among lower and higer level entity s
does tables are called relations
Un-Normalized Form (UNF) If a table having non-atomic values at every row, it is said to be in UNF. An atomic value is something that cannot be further decomposed. A non-atomic
Give the limitations of SQL authorization. The code for checking authorization becomes intermixed with the rest of the application code. Implementing authorization by applic
What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
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