Why must use programs be prohibited from writing to the memory locations containing the interrupt vector?

Use programs must be prohibited from writing to the memory locations containing the interrupt vector to maintain system stability and security. The interrupt vector is critical for handling hardware and software interrupts, and any unauthorized changes could lead to unpredictable behavior, crashes, or vulnerabilities that could be exploited by malicious software. Protecting these memory locations ensures that the operating system can reliably manage interrupts and maintain control over the system's response to events.