操作系统选择题·七

1. _____ is the concept in which a process is copied into main memory from the secondary memory according to the requirement.

   A. Paging

   B. Demand paging

   C. Segmentation

   D. Swapping

   
   

2. The pager concerns with the:

   A. individual page of a process

   B. entire process

   C. entire thread

   D. first page of a process

   
   

3. Swap space exists in:

   A. primary memory

   B. secondary memory

   C. CPU

   D. none of the mentioned

   
   

4. When a program tries to access a page that is mapped in address space but not loaded in physical memory, then?

   A. segmentation fault occurs

   B. fatal error occurs

   C. page fault occurs

   D. no error occurs

   
   

5. Effective access time is directly proportional to:

   A. page-fault rate

   B. hit ratio

   C. memory access time

   D. none of the mentioned

   
   

6. In FIFO page replacement algorithm, when a page must be replaced:

   A. oldest page is chosen

   B. newest page is chosen

   C. random page is chosen

   D. none of the mentioned

   
   

7. Which algorithm chooses the page that has not been used for the longest period of time whenever the page required to be replaced?

   A. first