What happens if a new interrupt request occurs with a lower priority than a previous request with an ISR currently running? It depends on how long the current ISR has been running It depends on how the priorities have been set for the interrupts. A higher priority interrupt can interrupt lower priority interrupts. The ISR for new request will run right away and the current ISR is terminated The ISR for the new request always runs when the current ISR is done QUESTION 10 Which is NOT true about the SysTick timer? It is only good for slow timing The counter is 24 bits It is a periodic timer It does not have a clock pre-scalar