Linux Bash Arithmetic Expressions Question:

The command 'hash':
a) manages a internal hash table
b) find and remember the full path name of the specified command
c) displays used command names and the number of hits
d) all of the mentioned

d) all of the mentioned

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Which command concatenate the specified argument into a single command, then execute the command? a) fc b) eval c) exec d) getopts	Which command runs the shell built-in command 'command' with the given argument? a) builtin b) caller c) there is no command present for this purpose d) none of the mentioned