Why might a system use interrupt-driven I/O to manage a single serial port, but polling I/O to

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Why might a system use interrupt-driven I/O to manage a single serial port, but polling I/O to manage a front-end processor, such as a terminal concentrator?
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Foundations of Financial Management

ISBN: 978-1259194078

15th edition

Authors: Stanley Block, Geoffrey Hirt, Bartley Danielsen

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