Shell Questions (6 points each) 1. What is short-circuit evaluation? Provide an example 2. Give the true table for the "&&" command operator. Your answer should depict the values for short-circuit evaluation 3. Every command in the bash-shell returns a value. What variable do you use 4. 5. 6. to obtain the returned value What is a built-in command? What is the Sha-Bang? For each of the following commands, enumerate the permissions of the file after the command is executed a) chmod 0743 filename b) chmod 0357 filename c) chmod 0246 filename 7. For each of the following commands indicate what it does: 2. cd 3. read 4. touch 5. test 8. For each of the following commands indicate what it does: 1. chmod 2. grep 3. umask 4 5. true