Final answer:
The CPU can turn off the maskable interrupt before executing critical instruction sequences to prevent unwanted interruptions.
Step-by-step explanation:
The CPU can turn off the maskable interrupt before the execution of critical instruction sequences that must not be interrupted. A maskable interrupt is a type of interrupt that can be enabled or disabled by the CPU according to the need of the system. They are used to handle less urgent tasks compared to nonmaskable interrupts, which cannot be turned off and are used for emergency situations. When a sequence of instructions cannot be interrupted for the system to function correctly, maskable interrupts may be turned off; this is a common function within interrupt-driven system designs.