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Out of the numerous uses of the queues, one of the most useful is simulation. A simulation program attempts to model a real-world phenomenon. Many popular video games are simulations, e.g., SimCity, Flight Simulator etc. Each object and action in the simulation has a counterpart in the real world. Computer simulation is very powerful tool and it is used in different high tech industries, especially in engineering projects. For example, it is used in aero plane manufacturing. Actually Computer Simulation is full-fledged subject of Computer Science and contains very complex Mathematics, sometimes. For example, simulation of computer networks, traffic networks etc.
A customer enters the bank at a specific time (t1) desiring to conduct a transaction. Any one of the four tellers can attend to the customer. The transaction (withdraws, deposit) will take a certain period of time (t2). If a teller is free, the teller can process the customer’s transaction immediately and the customer leaves the bank at t1+ t2. It is possible that none of the four tellers is free in which case there is a line of customers at each teller. An arriving customer proceeds to the back of the shortest line and waits for his turn. The customer leaves the bank at t2 time units after reaching the front of the line. The time spent at the bank is t2 plus time waiting in line. So what we want to simulate is the working environment of the bank that there are are serving customers one by one. A customer has to wait for a certain period of time before he gets served and by using simulation tool, we want to know the average waiting time of a bank customer. We will talk about this simulation in the next lecture and will do coding also in order to understand it well. |
gdb should contains definitions and their work in operating system
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