Due to a number of different memory blocks can only share a cache block, in the event of failure of the cache on the current contents of the cache must be cleared out block. This practice not only because of the frequent replacement of cached content caused a lot of delay, but not effectively use the program run has temporal locality.
Cache in the CPU if you do so much opposed to your CPU also become so large,as a result, it is not possible to do so large.
2.CPU immediately stop a running job.
Interrupt belong asynchronous event occurred.
Traps belong to the synchronizing state, usually by the execution of a particular instruction.
Yes, the purpose to protect system resources.
3.A device controller is a part of a computer system that makes sense of the signals going to, and coming from the CPU.
CPU is mainly explained computers and computer software in data processing.
CPU and device controller all can generate interrupts.
4.Program execution sequence, but an interrupt is generated, it will leave the program being executed immediately interrupt priority order. When finished with all emergency work, back to the original program interruption place, to finish the work.