{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Can you give an example to illustrate the scenario of cross-program call?","a":"Process management in operating systems: When a process needs to access the data  or resources of another process, it can be achieved through cross-process calls. For example, in Linux systems, system calls (such as pipe, msgpacket, etc.) are used to communicate between parent and child processes."}]}],"pr":"54bded70e2b3b0020af2cb7bf5e89860a001cef567a3fbd5ef7c483ae3d051c5"}