OfxWatchdog questions

using OfxwatchDog to reboot my app if it hangs.
Couple questions regarding initializing.
1 What would be the purpose and result of setting the 3rd parmeter, ‘use internal signal handler’ to true?

2 If the last parameter print more log info, is set to true, is this log info printed to an external file, or?

// ofxWatchdog::watch(msec, reboot, override, verbose)
// msec : how long does the watchdog wait, when the process hangs-up in milli seconds
// reboot : automatically restart the process
// override : use internal signal handler (optional)
// verbose : print more log information (optional)

ofxWatchdog::watch(3000, true, true, true);