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A system call is needed for inter-process communication (IPC) between cooperating processes because it provides a controlled interface for processes to request services from the operating system. This ensures that communication is managed safely and efficiently, allowing processes to share data, synchronize their actions, and exchange messages without directly accessing each other’s memory. By using system calls, the operating system can enforce security, manage resources, and maintain stability in a multi-process environment.

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1mo ago

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