EN0-001 Exam Dumps : ARM Accredited Engineer

Which of the following operations would count as intrusive to normal processor operation?

Which of the following is an optional extension to the ARMv7-A architecture?

An interrupt handler contains the following instruction sequence at the end. The purpose of these instructions is to clear the interrupt request in the interrupt controller and then safely re-enable interrupts.

STR r0, [r1] ; write to interrupt controller register to clear interrupt request

CPSIE i ; re-enable IRQ interrupts

Which of the following instructions should be placed at position in order to ensure that the interrupt controller sees the write before interrupts are re-enabled?