Linux Bash Arithmetic Expressions Question:
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The 'logout' built in command is used to:
a) shutdown the computer
b) logoff of the computer
c) logout the current user
d) to exit the current shell

Answer:

d) to exit the current shell

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The command 'umask -S'
a) prints the current mask using symbolic notation
b) prints the current mask using octal numbers
c) sets the mask to 000
d) sets the mask to 777		Which built-in command performs integer arithmetic in bash shell?
a) let
b) get
c) set
d) none of the mentioned