Operating Systems Section 1 - Technical Questions and Answers

21.

Describe the Buddy system of memory allocation.

22.

What is time-stamping?

23.	How are the wait/signal operations for monitor different from those for semaphores?
	Answer: If a process in a monitor signal and no task is waiting on the condition variable, the signal is lost. So this allows easier program design. Whereas in semaphores, every operation affects the value of the semaphore, so the wait and signal operations should be perfectly balanced in the program. Workspace Report errors ... Name : Email: View Answer

24.

In the context of memory management, what are placement and replacement algorithms?

25.

In loading programs into memory, what is the difference between load-time dynamic linking and run-time dynamic linking?

26.	What are demand-paging and pre-paging?
	Answer: With demand paging, a page is brought into memory only when a location on that page is actually referenced during execution. With pre-paging, pages other than the one demanded by a page fault are brought in. The selection of such pages is done based on common access patterns, especially for secondary memory devices. Workspace Report errors ... Name : Email: View Answer

27.	Paging a memory management function, while multiprogramming a processor management function, are the two interdependent?
	Answer: Yes. Workspace Report errors ... Name : Email: View Answer

28.	What is page cannibalizing?
	Answer: Page swapping or page replacements are called page cannibalizing. Workspace Report errors ... Name : Email: View Answer

29.	What has triggered the need for multitasking in PCs?
	Answer: Increased speed and memory capacity of microprocessors together with the support fir virtual memory and Growth of client server computing Workspace Report errors ... Name : Email: View Answer

30.	What are the four layers that Windows NT have in order to achieve independence?
	Answer: Hardware abstraction layer Kernel Subsystems System Services. Workspace Report errors ... Name : Email: View Answer