Problem

1. Observe this command; does it make any sense? set `set`

2. You have to run a job at night and need to have both the output and error messages in the same file. How will you run the script?

3. Write a script that behaves in both interactive and noninteractive mode. When no arguments are supplied, it picks up each C program from the current directory and lists the first 10 lines. It then prompts for deletion of the file. If the user supplies arguments with the script, it works on those files only.