SSC IMD SA 2017 – Question 144

Which of the following tables contains the base address of each page in physical memory?

• Process
• Memory
• Page
• Frame

Detailed Explanation:

The correct answer is c) Page [table] (पृष्ठ तालिका).

In an operating system with virtual memory:

• The Page Table is the fundamental data structure maintained by the memory management system for every active process.
• Its primary purpose is to maintain the mapping between the logical pages of a process and the physical frames of RAM.
• Each entry in the page table holds the base address (frame number) of the corresponding page in physical memory, along with status flags (such as the valid-invalid bit, dirty bit, and read/write protection bits).

Why Other Options are Incorrect:

• Process [table]: Stores general process control information (PCB – Process Control Block) such as PID, state, scheduling parameters, and open file descriptors.
• Memory: Physical storage hardware, not a table mapping pages to base addresses.
• Frame: Represents a fixed-size block of physical memory itself, not the lookup table containing base addresses.