Linux Bash Arithmetic Expressions Question:
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Which expression use the value of the enclosed arithmetic expression?
a) $(())
b) $()
c) ${}
d) $[]


a) $(())

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Which built-in command performs integer arithmetic in bash shell?
a) let
b) get
c) set
d) none of the mentioned
If a and b are 2 variables then the meaning of a<<=b is:
a) b = a << b
b) a = a << b
c) b = b << a
d) a = a << b