The correct answer is A - III, B - I, C - IV, D - II
Key Points
A. Paging - III:
Paging is a memory management scheme that eliminates the need for contiguous allocation of physical memory. This allows the physical address space of a process to be noncontiguous. It translates logical addresses to physical addresses. So, Paging matches with Logical to physical mapping.
B. LRU (Least Recently Used) - I:
LRU is a cache eviction algorithm that evicts the least recently used items first. It keeps track of the usage history of cache items and removes the least recently accessed item. So, LRU matches with Evicts least recently used process.
C. C-SCAN - IV:
C-SCAN (Circular SCAN) is a disk scheduling algorithm that moves the disk arm across the entire disk and then returns to the beginning. It services requests in one direction and jumps back to the start when it reaches the end. So, C-SCAN matches with Circular disk access.
D. Virtual Memory - II:
Virtual memory is a memory management capability of an operating system that uses hardware and software to allow a computer to compensate for physical memory shortages by temporarily transferring data from random access memory to disk storage. This extends the physical memory by using disk space. So, Virtual Memory matches with Extends physical memory.
Therefore, the correct option is A - III, B - I, C - IV, D - II. So, the correct option is 2).
