18 Questions
What are the two basic techniques virtual memory is based on?
Paging and partitioning
Which partitioning methods are available for managing memory?
Fixed Partitioning and Dynamic Partitioning
In fixed equal-size partitions, what is the major issue programmers face?
Programs not fitting in a partition
What is the consequence of inefficient main memory use in fixed partitions?
Memory fragmentation
When all partitions are full in equal-size partitioning, what determines which process will be swapped out?
Size of the process
What technique must programmers use to address the issue of programs not fitting in a partition?
Overlay design
What is the purpose of virtual memory in an operating system?
To relieve the user of tight constraints of main memory
What is thrashing in the context of memory management?
A condition in which excessive paging operations are taking place
Which of the following best describes paging in memory management?
Dividing memory into fixed-size blocks called pages
What is the role of the operating system in paging?
To automatically load pieces of a process into main memory as required
What is the main memory also known as?
RAM
Which of the following is a disadvantage of paging?
Increased disk usage
What is the principle of locality in virtual memory?
Program and data references within a process tend to cluster
What are the two ingredients needed for virtual memory to be practical and effective?
Hardware support and operating system management
Which page replacement algorithm aims to minimize the number of page faults?
Optimal
What is the importance of address translation in paging?
It allows logical addresses to be mapped to physical addresses
Which memory partitioning technique allows for efficient memory usage?
Buddy system
What is the role of the operating system in virtual memory?
To manage the movement of pages and/or segments between secondary memory and main memory
Learn about the concepts of real memory (main memory) and virtual memory (memory on disk) in operating systems. Explore how the operating system automatically loads pieces of a process into main memory as required.
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