Which is true of diagnosing and troubleshooting? Diagnosing attempts to identify the source of a problem, while troubleshooting looks for the nature of the problem. Diagnosing is used to fix problems with hardware, while troubleshooting is used to fix problems in program code. Diagnosing looks for the nature of the problem, while troubleshooting attempts to identify the source of the problem. Diagnosing is used to fix problems in program code, while troubleshooting is used to fix problems with hardware.