Virtual Memory

Where is Virtual Memory Located?

• RAM

• Flash Drive

• Compact Disk

• Hard Disk

What is virtual memory?

• An address assigned to a location in the Hard Disk that will allow that location to be accessed for collecting contents that has been stored and taken into physical memory(RAM).

• A feature of an OS that allows a computer to make up for shortages of physical memory(RAM) by transferring data from RAM to the Hard Disk.

• The range of memory addresses available to process.

• The address of a storage location in main memory(RAM).

What is Virtual Address?

• The virtual storage that a program is assigned to.  (Storage on the hard disk where the program is placed)

• The range of memory addresses available to process.

• The address of a storage location in main memory(RAM).

• A feature of an OS that allows a computer to make up for shortages of physical memory(RAM) by transferring data from RAM to the Hard Disk.

What is Address Space?

• The range of memory addresses available to process.

• An address assigned to a location in the Hard Disk that can be accessed for retrieving contents that have been stored and then taken into physical memory(RAM).

• The address of a storage location in main memory(RAM).

• A feature of an OS that allows a computer to make up for shortages of physical memory(RAM) by transferring data from RAM to the Hard Disk.

What is Physical Address?

• Your home address where you currently live.

• An address assigned to a location in the Hard Disk that will allow that location to be accessed for collecting contents that has been stored and taken into physical memory(RAM).

• The address of a storage location in main memory(RAM).

• The range of memory addresses available to process.

There are 3 features important to memory management. If these 3 features are present, segments or pages of a process are not necessary in main memory during execution.

• True

• False

Does the Principle of Locality help in making good guesses that avoid thrashing?

• True

• False

Thrashing in Operating Systems mean?

• Pieces of a process is brought into main memory.

• A state in which the system spends most of its time swapping process pieces rather than executing instructions.

• Leaving an area completely covered in trash.

• An interrupt is generated when an address is needed and not located in main memory(RAM).

With the implementation of Virtual Memory, more processes may be maintained in main memory because portions of a particular process are loaded, leaving room for more processes.

• True

• False

Each segment table entry contains the starting address of the segment in RAM and the length of the segment.

• True

• False