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Which mechanism can control the access?(a) in-situ(b) spin-lock(c) ex-situ(d) both in-situ and ex-situI had been asked this question in exam.Question is taken from Resource Protection topic in division Real Time Operating systems of Embedded Systems

Answer»

Right answer is (b) spin-lock

To ELABORATE: Both the MEMORY and the HARDWARE part are protected by the memory management unit and the hardware such as the input-output devices are protected, These are prevented from the direct access. These accesses are made through a DEVICE driver and this device driver can control the serial port. Such a mechanism is called spin-lock mechanism which provides the control access.



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