plz solve all of them and i will upvote you immediately

Question No 1: True or False 1. The purpose of f0rk0 is to create a new parent process. 2. System call fork () returns a process ID. 3. If fork () returns any positive value, it means creation of 4. The perror 0 function is error-handling tools. Question No 2: Give short answers of following questions. 1. Which command is used to see the output of program after compilation? \begin{tabular}{|c|} \hline 12 \\ \hline 0.54=2.0 Marks \\ \hline \end{tabular} 2. How to save program after writing in "vi" editor. 3. Which command gives ID of only parent process? 4. I want to sleep of 20 seconds which command I will use. Operating Systems (227CSS-3 \& 332CCS-3) - GROUP A (I)