Infosys Embedded Systems Engineer Interview Questions and Answers

A watchdog timer is a hardware or software component that monitors the operation of a system and resets it if necessary.

• A watchdog timer is used to prevent system crashes or lock-ups by resetting the system if it becomes unresponsive.

• It is typically implemented as a counter that needs to be periodically reset by the system software.

• If the watchdog timer is not reset within a certain time period, it triggers a system re...read more

Semaphore is a synchronization object used to control access to a shared resource.

• Semaphore is a signaling mechanism used to control access to a shared resource

• It allows multiple processes/threads to access the shared resource simultaneously

• Semaphore maintains a count of the number of resources available

• When a process/thread requests access to the resource, the count is decremented

• When the process/thread releases the r...read more

Interrupt latency is the time delay between the occurrence of an interrupt and the start of the routine that services the interrupt.

• Interrupt latency is a critical factor in real-time systems

• It can be affected by factors such as the priority of the interrupt and the current state of the processor

• Reducing interrupt latency can improve system performance and responsiveness

• Examples of interrupts include hardware interrupt...read more

DMA address deals with data transfer between memory and peripherals without CPU intervention.

• DMA stands for Direct Memory Access.

• DMA address is used to transfer data between memory and peripherals without CPU intervention.

• DMA address is used to reduce the load on the CPU and improve system performance.

• Examples of peripherals that use DMA include network cards, sound cards, and hard drives.