Virtual Memory Quiz

What does MMU stand for?

• Memory Mapping Unit

• Memory Management Unit

• Multi-core Mapping Unit

• Memory Mapped Unit

Which of the following is NOT a function of virtual memory?

• Allows larger programs to run on systems with less physical RAM

• Allows faster memory access by increasing the size of the cache

• Isolates processes from each other

• Allows processes to use more memory than available RAM

What is the purpose of the page table in virtual memory?

• To store all the pages in memory

• To divide programs into pages

• To manage I/O devices

• To map virtual addresses to physical addresses

What is a page fault?

• When a program accesses a memory location that is not mapped to RAM

• When the program crashes due to lack of memory

• When a page of memory becomes corrupted

• When the system runs out of memory pages

What is demand paging?

• Load pages as they are needed

• Load all pages of a program into memory at once

• Prevent pages from being swapped out of memory

• Pre-load frequently accessed pages

What is the typical size of a memory page?

• 1KB

• 2KB

• 4KB

• 8KB

What happens when the system runs out of physical memory but more pages are needed?

• The system crashes

• Virtual memory is disabled

• Pages are swapped to disk

• New pages are created in memory

What is the 'working set' in virtual memory systems?

• The total number of pages in memory

• The size of the virtual address space

• The maximum number of pages allowed per process

• The number of pages actively used by a process

What is the main disadvantage of using virtual memory?

• It limits the size of physical memory

• It requires multithreading

• It can introduce latency due to pages swapping

• It can only be used in single-tasking systems

What is a translation lookaside buffer (TLB)?

• A special cache used to store page table entries

• A table that translates physical addresses into virtual addresses

• A buffer that manages I/O operations

• A register that holds the current memory page