You could get the password in under 60 seconds. This is why modern Packet Tracer (8.x) completely revamped the security.
In legacy files, the password or the "password-protected" flag could be located by opening the .pka file in a hex editor (like HxD). crack patched activity wizard password cisco packet tracer
If you bypass the password, you only cheat yourself. The CCNA exam does not have a “patch” or a “wizard.” When you sit in the exam room, there is no crack tool to save you. The knowledge you skip by viewing answers today becomes a failed exam tomorrow. You could get the password in under 60 seconds