[مخالف]مساعده

السلام عليكم

صباح الخير أنا عندى بعض الاشكاليات وأريد منكم التوضيح فقط

وهذ اليس واجب كما زعمت أنا أريد من ذوى العلم أن الايبخالو علينا

وشكرا,

1- What is the purpose of interrupts? What are the differences between a trap and an interrupt? Can traps be generated intentionally by a user program? If so, for what purpose?

2- Direct memory access is used for high-speed I/O devices in order to avoid increasing the CPU´s execution load.

a. How does the CPU interface with the device to coordinate the transfer?

b. How does the CPU know when the memory operations are complete?

c. The CPU is allowed to execute other programs while the DMA controller is

transferring data. Does this process interfere with the execution of the user

programs? If so, describe what forms of interference are caused.

3- Describe three general methods for passing parameters to the operating system.

4- What are the two models of inter-process communication? What are the strengths and weaknesses of the two approaches?

5- What is the main advantage for an operating-system designer of using a virtual-machine architecture? What is the main advantage for a user?