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Q. Some untimely computers protected the operating system by placing it in a memory partition that couldn't be modified by either the user job or the operating system itself. Explain two difficulties that you think could arise with such a scheme.
Answer: The data necessary by the operating system (access controls, passwords, accounting information, and so on) would have to be stored in or passed through unprotected memory and thus be accessible to unauthorized users.
How can a user program disturb the normal operation of the system? a) Issuing illegal I/O operation. b) By accessing memory locations within the OS itself. c) Refusing to
what is difference between file descriptor and file pointer?
Q. In a disk jukebox what would be the result of having more open files than the number of drives in the jukebox? Answer: Two bad results could result. One likelihood is star
What are the various disk-scheduling algorithms? The several disk-scheduling algorithms are a. First Come First Served Scheduling b. Shortest Seek Time First Scheduling
Operating Systems 1. Explain single Partition Allocation and Multiple Partition Allocation. 2. What do you mean by PCB? What useful information is available in PCB? 3. De
Referring to Figure below, discuss how you would alter the circuit to obtain: 1. a straightforward amplifier with gain 1, 2. a straightforward amplifier with gain 10, 3. a
Explain with an example the need of Shift Alteration in critical section problem? Consider processes P i and P j and consider the algorithm for P i and P j .
Describe the purpose of the checkpoint mechanism. How habitually must checkpoints be performed? Explain how the frequency of checkpoints affects: System performance while no
Question: a) Each process is represented in the operating system by a process control block (PCB). The PCB contains many pieces of information associated with a specific proce
What are the two principles in Hungarian method?
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