One of the actions listed are not carried out in interrupt h

One of the actions listed are not carried out in interrupt handling. Which one? Return address is stored in r14. Operating mode change CPSR is stored in the shadow register SPSR. R_0~r_3 registers are automatically pushed into the stack. The following statements are on interrupt vectors. One of them is incorrect. Which one? An interrupt vector holds the address of an interrupt routine. Reset Handler, ie the reset interrupt routine\'s Interrupt Vector is allocated at 0 Times 0000 0004. The Cortex_M3\'s interrupt vectors are located at the beginning of the memory. An interrupt vector holds the return address of an interrupt routine. The following statements are on interrupts and the relevant programming. Only one is correct. Which one? High priority level interrupts can interrupt lower level interrupts. IRQ and FIQ share same stack in the memory. The return instruction in the IRQ or FIQ interrupt routines use the instruction SUBS pc, r14. All interrupts must have different priority levels.

Solution

Q3 : operating mode change.

Q4 : option (d)

Q5 : option ( d)