What is cache-coherency?

Correct Answer: Scheduler deals with the problem of deciding which of the process in the ready queue is to be allocated the CPU Short Term Schedulers, Long Term Schedulers

Correct Answer: An interpreter reads one instruction at a time and carries out the actions implied by that instruction It does not perform any translation But a compiler translates the entire instructions

Correct Answer: A situation, where several processes access and manipulate the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place, is called race condition To guard against the race condition we need to ensure that only one process at a time can be manipulating the same data The technique we use for this is called process synchronization

Correct Answer: Main memory - only large storage media that the CPU can access directly Secondary storage - extension of main memory that provides large nonvolatile storage capacity

Correct Answer: Waiting state

Correct Answer: Responsiveness Resources sharing Economy Utilization of multiprocessor architectures

Correct Answer: diskcopy

Correct Answer: Logical address space is generated from CPU; it bound to a separate physical address space is central to proper memory management Physical address space is seen by the memory unit Logical address space is virtual address space Both these address space will be same at compile time but differ at execution time

Correct Answer: Fragmentation occurs in a dynamic memory allocation system when many of the free blocks are too small to satisfy any request External Fragmentation: External Fragmentation happens when a dynamic memory allocation algorithm allocates some memory and a small piece is left over that cannot be effectively used If too much external fragmentation occurs, the amount of usable memory is drastically reduced Total memory space exists to satisfy a request, but it is not contiguous Internal Fragmentation: Internal fragmentation is the space wasted inside of allocated memory blocks because of restriction on the allowed sizes of allocated blocks Allocated memory may be slightly larger than requested memory; this size difference is memory internal to a partition, but not being used

Correct Answer: 1) ability to support multiple processors 2) virtual storage 3) source level debugging