SQL:1999 is the standard for which database?
A、Relational.
B、Object-relational.
C、Object-oriented.
D、All of the above.
A、Relational.
B、Object-relational.
C、Object-oriented.
D、All of the above.
A、dysphagia
B、dyspnea
C、dyskinesia
D、dystrophy
A、1 and 4
B、4 and 6
C、1, 4 and 6
D、3, 4 and 6
A、Dirty read possible
B、Nonrepeatable read possible
C、Phantom possible
D、Repeatable read
A、Structured types.
B、References.
C、Collections.
D、All of the above.
A、Map the entire class hierarchy to a single “superclass” table.
B、Map each disjoint concrete class to a table.
C、Map each abstract class to a table.
D、None of the above – all are permissible.
A、Unit of work.
B、Identity map.
C、Data mapper.
D、Lazy load.
A、to program business rules
B、in support of database security
C、to define domains
D、none of the above.
A、Write intent lock.
B、Read lock.
C、Shared lock.
D、No lock.
Read the attached project statement, develop a class diagram corresponding to your sequence diagram from Task 5. Show only operations in classes (specify names of operation’s arguments and return types). Show constructors for classes that were instantiated in Task 5. Specify relationships between classes (use uni-directional associations unless the interactions from Task 5 suggest both-directional communication). Show visibility of operations. Describe the meaning of the model, including any assumptions you have made, in text under the diagram.
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