Bash - Variables - multichoice questions

Question 1

Which of the following commands would append the directory /opt/bin to the current value of the PATH environment variable?

Which of the following commands would create a file called jan_reports.txt?

Which command would display the current shell’s process id (pid)?

Which of the following is not a feature of environment variables?

All processes use environment variables, not just those running the bash shell.
Environment variables are inherited by child processes by default.
Upon startup, the bash shell clears all previously defined environment variables.
Environment variables can be examined using files found in the /proc filesystem.
Environment variables possess all these features.

Which ones(s) of the following would correctly set the shell variable ADDR to 123_Elm_St.?

The user elvis performs the following command:

[elvis@station elvis]$ STYLE=terse

Which of the following commands could be used to examine the value of STYLE?

Which of the following command lines would create a file called make $ at home!?

What is the output of this code?

VAR="/var/www/html/website.com/html/"
echo "${VAR#*/html}"

What is the output of this script?

#!/bin/bash
fname=john
john=thomas
echo ${!fname}

When used from within a script, which variable contains the name of the script?