Please evaluate and explain the following statements:
a. An interrupt is always a high priority, urgent task.
b. Using interrupts is always faster than polling.
c. System latency is always larger than interrupt latency
d. Global variables used within an ISR should always be declaredvolatile.
e. The interrupt vector table must be placed in a specific locationin memory.
Answer
a. An interrupt is always ahigh priority, urgent task.
Interrupts aresignals sent to the CPU by external devices, normally I/O devices.They tell the CPU to stop its current activities and execute theappropriate part of the operating system.
There are three types ofinterrupts:
- Hardware Interuptsare generated
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