[amp_mcq option1=”works best with many small partitions” option2=”allows many programs to use memory simultaneously” option3=”allows each program in turn to use the memory” option4=”does not work with overlaying E. None of the above” correct=”option2″]
The correct answer is: B. allows many programs to use memory simultaneously.
Swapping is a technique used in computer operating systems to move data from main memory to secondary storage and vice versa. It is used to manage memory when the amount of memory available is less than the amount of memory required by all the programs that are currently running.
Swapping allows multiple programs to use memory simultaneously by moving programs that are not currently being used to secondary storage. This frees up memory for programs that are currently being used.
Swapping is not a perfect solution, as it can cause programs to be slowed down when they are swapped in and out of memory. However, it is a necessary technique for managing memory in most operating systems.
Here is a brief explanation of each option:
- A. works best with many small partitions. This is not true. Swapping works best with a few large partitions. This is because it is more efficient to move large blocks of data than small blocks of data.
- B. allows many programs to use memory simultaneously. This is true. Swapping allows multiple programs to use memory simultaneously by moving programs that are not currently being used to secondary storage. This frees up memory for programs that are currently being used.
- C. allows each program in turn to use the memory. This is not true. Swapping allows multiple programs to use memory simultaneously.
- D. does not work with overlaying. This is true. Swapping does not work with overlaying. Overlaying is a technique used to reduce the amount of memory required by a program by dividing the program into multiple parts that can be loaded into memory as needed. Swapping does not work with overlaying because it requires that the entire program be in memory at all times.
- E. None of the above. This is not true. The correct answer is B.