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Describe about Use Case and external case in DFD
The processes are transformed those into the Use Case and external case in DFD has same characteristics which of an actor in OOAD.
The data store is transformed into class and part of data store to attributes of class.
Draw an ER diagram that shows the organization of a simple student database. The database captures the information about letter grades obtained by university students who enrolled
List any two disadvantages of a database system ? The disadvantages of database system are: • Database systems are difficult, complex, and time-consuming to design. • Substanti
sql is relationally complete-justify
The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored
what is difference between circular inked lust and grunded linked list
WHAT IS MEANT BY E-R MODEL
Q. Why would you choose a database system instead of simply storing data in operating system file? Define at a base concept in details. Sol. Advantages of Database over Fil
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
Homework chapter 10 no 3
Unrepeatable reads : Assume T7 reads X twice during its implementation. If it did not update X itself it could be very disturbing to see a dissimilar value of X in its next read. B
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