IoT Hardware Devices and Processors ISE Practice Questions (Page 6)

Questions 26–30

1. 26expert · hard

   A developer is debugging a hard fault on an ARM Cortex-M4 microcontroller running an RTOS. The fault occurs intermittently when a high-priority task accesses a shared data structure that is also used by an interrupt service routine (ISR). The developer suspects a race condition. Which approach is the most appropriate to resolve this issue?

   • AMove the shared data structure to a different memory region.
   • BIncrease the priority of the task to ensure it runs to completion before the ISR.
   • CDisable interrupts around the critical section in the task.
   • DUse a mutex to protect the shared data structure.
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   In bare-metal programming on a microcontroller, how does the processor respond to an external event like a button press?

   • AIt uses an interrupt to pause the current code and run an interrupt service routine (ISR)
   • BIt polls the button continuously in the main loop
   • CIt shuts down the processor to save power
   • DIt restarts the entire program
   Reveal Solution Discussion Select an answer first
4. 28foundation · easy

   Which interface is typically used to connect a digital temperature sensor to an IoT microcontroller for reading temperature values?

   • ASPI
   • BUSB
   • CUART
   • DGPIO
   Reveal Solution Discussion Select an answer first
5. 29foundation · easy

   What is a primary difference between a microcontroller and a microprocessor in the context of IoT devices?

   • AA microprocessor has built-in flash memory, while a microcontroller does not.
   • BA microcontroller can run a full operating system like Linux, while a microprocessor cannot.
   • CA microcontroller integrates CPU, memory, and peripherals on a single chip, while a microprocessor typically requires external components.
   • DA microprocessor is always more power-efficient than a microcontroller.
   Reveal Solution Discussion Select an answer first
6. 30application · medium

   A developer is connecting a high-speed camera sensor to a microcontroller for a machine vision application. The camera sensor outputs data at 50 Mbps. Which interface is most appropriate for this data rate?

   • AUART at 115200 baud
   • BI2C at 400 kHz
   • CParallel camera interface or MIPI CSI
   • DSPI at 20 MHz
   Reveal Solution Discussion Select an answer first