Distributed operating systems consist of :
2017
Distributed operating systems consist of :
- A.
Loosely coupled O.S. software on a loosely coupled hardware.
- B.
Loosely coupled O.S. software on a tightly coupled hardware.
- C.
Tightly coupled O.S. software on a loosely coupled hardware.
- D.
Tightly coupled O.S. software on a tightly coupled hardware.
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Correct answer: C
Answer: Tightly coupled operating system software on loosely coupled hardware.
Explanation: In a distributed operating system, the physical machines are independent and connected by a network (loosely coupled hardware). The distributed OS implements tight integration in software so that these separate machines appear and behave like a single coherent system.
Loosely coupled hardware: independent processors with their own memory and OS, communicating over a network.
Tightly coupled software: the distributed OS provides resource sharing, process coordination, transparency, and a single-system image across the networked machines.
Why other combinations are wrong: if the software is loosely coupled, the system would behave like a collection of independent machines rather than a unified system; if the hardware is tightly coupled, the scenario describes a single closely integrated machine rather than a distributed system.