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Illustrate some notations of object modeling notations
A classifier is a mechanism which describes behavioural and structural features. In UML significant classifiers are class, signals, data type, interface, use case, nodes, components, and subsystems.
A class is a description of a set of objects which share same attribute, semantics, operations, and relationships. In UML, it is represented by a rectangle.
An attribute is a named feature of a class which describes a range of values that instances of property may hold. In UML, they are listed in the compartment just below the name of that class.
An operation is implementation of a service which can be requested from any object of class to affect behaviour. In UML, they are listed in the compartment just below to that of the class attribute.
Explain the working of broad band ISDN. BISDN Configuration: Figure shows how access to the BISDN network is accomplished. All peripheral devices are interfaced to the acces
Q. Show Packing and Unpacking Data? Packing and Unpacking Data pvm_packs - Pack active message buffer with arrays of prescribed data type: int info = pvm_pac
Define data type and abstract data type comment upon the significant of both
what is anatomy of digital computer
What are the advantages of electronic payment system? Advantages of the electronic payment system are illustrated below: This gives good security schemes. Four important sec
It is desirable that operating speed of primary storage of a computer system be as fast as possible since most of the data transfer to and from processing unit is via main memory.
Used to interrupt CPU normal implementation routine and to get its attention .Mostly generated by an external devices, timers, counters...etc
Draw and elucidate the block diagram of programmable interrupt controller 8259. The 8259A adds 8 vectored priority encoded interrupts to microprocessor. It can be expanded to 6
Define emulation. Given a computer with a particular instruction set, it is possible to explain additional machine instructions and execute them with extra micro routines. Emul
Yet another type of input is HIDDEN input. A HIDDEN input is a value/name pair which is returned to you but doesn
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