Debugging Question: Download Linux Debugging PDF

Which GDB command interrupts the program whenever the value of a variable is modified and prints the value old and new values of the variable?
a) watch
b) show
c) trace
d) none of the mentioned

a) watch

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Which GDB command prints the value of a variable in hex. a) print/x b) print/h c) print/e d) none of the mentioned	Which GDB command produces a stack trace of the function calls that lead to a segmentation fault? a) trace b) backtrace c) forwardtrace d) none of the mentioned