Q17.What are the parameters required to design device drivers?ġ:- Structure: Synchronous entry and asynchronous entry. DMA provides high-quality performance and is used to execute overall execution in the system. Data transfer between two devices can be done by an interrupt. I/o Devices data can be detected and communicated automatically. Q16.What is the use of DMA in embedded systems?ĭMA means Direct Memory Access controller which handles dynamic memory allocation and allow data to be transferred between devices. It helps to construct the iterative model by using library components which involve analysis of the model so that the process can be made automated. It provides a Bottom-up and top-down approach. Model transformation basically used to obtain different views for embedded project development. Q15.What is the use of model transformation in embedded? A device’s interrupt priority is picked on two criteria: it’s maximum interrupt latency requirements and the device driver’s interrupt execution time. Once that cannot be serviced within the time limits specified for bus interrupts qualify as off-level interrupts. The execution time of the device driver’s interrupts. Interrupts selection based on two criteria: No, Smart devices are not embedded systems but it contains several embedded systems like Wifi, Bluetooth, GSM Modules. Timer calculation can be done by an external clock and controller itself. Timers maintain accuracy and precise value. By using for loop we can generate delay but will not get accuracy as per requirement. Timers maintain accuracy as per requirement. Timer is not only used to generate delay but used to count pulses. Q11.List various timers in embedded systems?Īns: Time Slicing, Time Division, Capture, and Compare Timer.Timer/Counter Every protocol has its unique quality to show performance in industry project. As per industry requirement and project need all three are best. Q10.In I2C, SPI and CAN which one is best?ĭon’t give an answer to the interviewer that is best. The microcontroller has I/O, memory,& Peripherals inbuilt into it and designed for control. Microprocessor is a device in which memory, peripherals, and I/O devices connected externally. Q9.What is the difference between microprocessor and microcontroller? The execution time of microcontrollers works in microseconds which give the output of particular embedded applications in specific time duration. Microcontroller is an electronic device which controls I/o devices and has own CPU which contains peripherals, memory, and processor which can be used as embedded systems. So to receive and send contents on device/computer I/O device functionality can be used by embedded applications. While communicating and interchanging contents with these devices require physical entities. Q7.Why I/O Devices are important in embedded systems?Īs we know embedded systems have inbuilt on a single chip which contains peripherals, memory and communication protocols like I2C, SPI CAN. Wrong insertion of Memory devices into memory slots.Transient current and static charges which damages memory devices.Wrong addressing of address lines and data lines within a circuit.Q6.What are commonly found errors in embedded systems? In the little endian format, little end data stored first. In multiple bytes, the first byte is the biggest or represents the primary value but The big-endian means data is stored at the big end first. Q5.What is big-endian and little-endian format in embedded systems? Q4.What is mean by an infinite loop in embedded systems?Īns: As it works on real-time embedded systems applications which used to repeatedly monitoring/processing status of the program. In RTOS time responsiveness is fast and it maintains scalability. Why embedded applications are real-time?Īns: An embedded system is a dedicated electronics design system which is used to control and access data within a given response time to handle critical events. It helps to achieve a real-time embedded system with considering factors like speed and efficiency. Have its own CPU which contains memory, timers, peripherals, bus, reset, on-chip oscillation.Īs we all know it’s a combination of hardware and software.Embedded systems can be termed as a combination of hardware and software.Here are some frequently asked Embedded Interview Questions :
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