A. to use primary memory efficently
B. to do intra process communication
C. to do inter process communication
D. None of above

Solution

C. to do inter process communication

Explanation

The main function of shared memory is to provide a mechanism for inter-process communication (IPC), allowing multiple processes to share data and communicate with each other more efficiently. Shared memory is a method by which several processes can access common data structures, variables, or segments of memory.