Linux Bash Arithmetic Expressions Question:
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Which one of the following is bit-wise 'exclusive or' operator?
a) ^=
b) |=
c) !=
d) none of the mentioned

Answer:

a) ^=

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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
Which one of the following is not a valid operator in bash shell?
a) ||
b) ~
c) =<<
d) -=