Debugging Question: Download Linux Debugging PDF

In GDB, we can refer to machine register contents, in expressions, as variables with names starting with:
a) $
b) #
c) !
d) none of the mentioned

a) $

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Which one of the following variables is used within GDB to hold on to a value and refer to it later? a) convenience variables b) environment variables c) temporary variables d) none of the mentioned	In GDB hardware-dependent information about the floating point unit can be displayed by the command a) info float b) display float c) show float d) none of the mentioned