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Computer Science Engineering Object Oriented Programming Using C Plus Plus Difficulty: Medium

Which of the following can be considered as a distributed caching system? This program can send the request to #include<stdio.h> #include<netinet/in.h> #include<sys/types.h> #include<sys/socket.h> int main() { int fd_client,fd, len; struct sockaddr_in add_server; fd_client = socket(AF_INET,SOCK_STREAM,0); if (fd_client == -1) { perror("fd_sock"); exit(1); } add_server.sin_family = AF_INET; add_server.sin_port = ntohs(4001); add_server.sin_addr.s_addr = inet_addr("193.39.0.4"); len = sizeof(add_server); fd = connect(fd_client,(struct sockaddr*)&add_server,len); if(fd == -1) perror("connect"); return 0; } . . . . . . . . option is used with df command for displaying the total amount of disk space in the file system in terms of Kilobytes. How the decision tree reaches its decision? Which devices measures gases or liquid?