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entity relationship diagram for online examination system
What is an Operand? The data on which the operation is to be performed is known as an Operand
What is deadlock? How can it be avoided? How can it be resolved once it occurs? Deadlock happens when two transactions are each waiting on a resource that the other transaction
why are older data base model are being replaced by new data model
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 O
What are the two types of indices? The two types of indices are:- A) Dense index B) Sparse index
Implementation of association as an object Implement as a separate association object, independent of either class, as in Figure. An association object is a group of pairs
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
Process to find the non-concurrent objects Once we find out non-concurrent (mutually exclusive) objects, we can fold all objects together in one thread of process or control. O
Home based assignment Consider an ORDER table with the following attributes: • Order Number (ONo),Customer Number (CNo),Customer Name (CNa),Item Number (INo),Unit Price (UP), Quant
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