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GlobalFon is an international communication company, which offers international prepaid calling cards. They introduced three different types of cards, (1) AsiaFon: is cheapest for calling all over Asia. (2) EuroFon: offers economical rates for all over Europe and UK. AmericanoFon: offers very attractive rates for USA and Canada. Every card has attributes for activation (True/False), activation date, time remaining, and no. of call made. The card is available in domination of $5, $10 and $20. Assuming there are serial numbers on card for keep track of production system, and a 14-digit code for activating the card. The validity for card after activation is 45 days. AsiaFon; offers 25cent per minutes. EuroFon charges 16 cents per min. AmercanoFon charges 12 cents per min. The billing least count is min. The company wants object oriented software to handle the service of international calling. You are only required to developed classes for processing cards with basic functionality.
a. Explain the hardware mechanism for handling multiple interrupt requests. b. What are handshaking signals? Describe the handshake control of data transfer during input and out
Although there are no compulsory "c" compiler for this subject, but the compiler we are going to use for this example is the Mingw32 compiler. Download the source code files fro
What is computer science
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Explain The Boolean Equations for Logic Circuits? A Boolean equation is the mathematical representation of a logic circuit using standard Boolean terms. All the logic gates (AND,
A student counted up the number of statements implemented in a program developed for sorting n integers and came up with a recurrence of the form: T(n) = a * n + b + 2T(n/2), an
Q. Write an interrupt routine to handle 'division by zero'? This file can be loaded just like a COM file though makes itself permanently resident until the system is running.
Explain ISDN Addressing with a example. A sub address, though a part of the ISDN address, is not seems as an integral part of the numbering scheme. Sub-address is carried in a
What is computer virus? A computer virus is a computer program that is designed to spread itself between computers. Computer virus are inactive when standing a
Assessing Heuristic Searches Given a specific problem you want to create an agent to solve, there can be more than one way of specifying it as a search problem, more than one o
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