Answer All Questiuons with your own words. do not copy and paste from solutions on the chegg . i need authentic answer. Answer all questions as they are easy. otherwise i will not accept it.

Question #2: What do you think is the role of system calls in an operating system? Explain your answer with few examples. Question # 3 How do processes communicate with one another? Explain Different Message Passing Systems. Also simply names of IPC tools. Question #4 What would be the output of the following code segment, if the current working directory contains the following files and directories: bashrc, .profile, .private, test.c, main.c, courses, personal. main() pid_t childpid; childpid = fork(); if (childpid == -1) { printf("Eork failed. "); exit(1); } if (childpid == 0) { if (execlp ("/bin/ls", "ls ./", NULL)