Memory Management Techniques:
Contiguous Allocation:
Question: What is contiguous allocation in memory management?
Answer: Contiguous allocation assigns a single block of memory to a process. It means that the entire process must occupy one continuous block of memory.
Non-contiguous Allocation:
Question: How does non-contiguous allocation differ from contiguous allocation?
Answer: Non-contiguous allocation allows a process to be scattered throughout the memory. It uses techniques like paging and segmentation to manage memory allocation.
Paging:
Question: Explain the concept of paging in memory management.
Answer: Paging divides physical memory into fixed-size blocks called pages. Processes are divided into the same-sized pages, and each page can be placed anywhere in physical memory.
Segmentation:
Question: What is segmentation in memory management?
Answer: Segmentation divides the logical address space of a process into segments, where each segment represents a different type of data. It provides flexibility but can lead to fragmentation.
Paged Segmentation:
Question: Describe the concept of paged segmentation?
Answer: Paged segmentation is a combination of paging and segmentation. It combines the benefits of both techniques, allowing for flexibility in segment sizes while avoiding external fragmentation.
Comparison of Techniques:
Question: Compare contiguous allocation, paging, and segmentation in terms of advantages and disadvantages?
Answer: Contiguous allocation is simple but can lead to fragmentation. Paging and segmentation address fragmentation but introduce their own complexities. A comparison involves trade-offs in terms of efficiency and simplicity.
Virtual Memory:
Concept of Virtual Memory:
Question: What is virtual memory, and why is it used in computing?
Answer: Virtual memory is a memory management technique that provides an illusion to users that each process has its own dedicated memory. It allows for efficient utilization of physical memory.
Overlay:
Question: Explain the concept of overlay in virtual memory.
Answer: Overlay is a technique where a program is divided into sections, and only the necessary sections are loaded into memory at a given time. It helps overcome the limitations of limited physical memory.
Dynamic Linking and Loading:
Question: What is dynamic linking and loading in the context of virtual memory?
Answer: Dynamic linking allows multiple programs to share a single copy of a library, while dynamic loading loads executable modules into memory only when they are needed, improving resource utilization.
Demand Paging:
Question: How is virtual memory implemented using demand paging?
Answer: Demand paging loads pages into memory only when they are needed, reducing initial load times and allowing more efficient use of physical memory.
Memory Management in Unix/Linux & Windows:
Question: Compare the memory management strategies in Unix/Linux and Windows operating systems?
Answer: Unix/Linux and Windows use variations of demand paging and employ techniques like page replacement algorithms to manage virtual memory efficiently.
These questions cover the specified syllabus and can help in understanding the fundamental concepts of memory management and virtual memory.
Note: These questions cover the specified syllabus and can help in grasping the key concepts related to Memory Management Techniques, Virtual Memory, Segmentation, demand paging and dynamic linking and loading.
0 Comments