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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.
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
Which operator is used to compare a value to a list of literals values that have been specified? BETWEEN operator is used to compare a value to a list of literals values that h
Strict 2PL :Though, this basic 2PL suffers from the trouble that it can result into loss of isolation / atomic property of transaction as theoretically speaking once a lock is rele
How external/conceptual mapping and conceptual /internal mapping is performed
Question 1 Explain the concept of Foreign Key. How a foreign key differs from a Primary Key? Can the Foreign Key accept nulls? Question 2 With a necessary example explain (i)
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
Explain the function of Object model Object model describes the classes of objects in system, including their attributes and operations which they support. The analysis object
Explain in detail the consistency model of the distributed file system you studied (GFS or AFS). Present the consistency model chosen and how it was achieved through design. Clarit
Explain the steps for reduction of E-R model into relational model. Ans:(a) Entity set in E-R model will be considered as table name in relational Model. (b) Attributes of e
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
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