Quiz on Memory Management in Operating Systems

What is the purpose of the Memory Management Unit (MMU)?

• To manage CPU scheduling

• To map virtual addresses to physical addresses

• To handle input/output operations

• To allocate disk space

Which memory management technique involves dividing memory into fixed-sized blocks?

• Segmentation

• Swapping

• Paging

• Contiguous Allocation

What does the valid-invalid bit in a page table indicate?

• Whether the page is read-only

• Whether the page is in the process' logical address space

• Whether the page is in the cache

• Whether the page is modified

What is the main disadvantage of using the First-In-First-Out (FIFO) page replacement algorithm?

• It can lead to Belady's Anomaly

• It is the most efficient algorithm

• It requires complex hardware support

• It is easy to implement

What is the purpose of the base and limit registers in memory management?

• To manage cache memory

• To handle disk I/O

• To protect user processes from each other

• To define the physical address space

Which of the following is a characteristic of demand paging?

• It requires more physical memory

• Pages are loaded only when needed

• It eliminates page faults

• All pages are loaded into memory at once

What does internal fragmentation refer to?

• Memory that is inaccessible to the OS

• Unused memory within allocated blocks

• Memory that cannot be allocated due to fragmentation

• Memory that is lost during swapping

In which memory management technique are segments defined as logical units?

• Contiguous Allocation

• Swapping

• Segmentation

• Paging

What is the main advantage of using dynamic linking?

• It reduces the size of the executable file

• It allows for faster execution of programs

• It eliminates the need for libraries

• It simplifies the compilation process

What is thrashing in the context of memory management?

• The process of swapping pages in and out of memory

• High memory usage without any processes running

• Excessive page faults leading to low CPU utilization

• The allocation of memory to multiple processes