Session – 1 Interview Questions from Embedded Systems, Microprocessor, Microcontrollers –
The Memory Management Unit is a hardware component present in ARM processors that is responsible for managing memory and providing memory protection. The MMU allows the processor to map virtual memory addresses to physical memory addresses, and it also enforces memory protection by preventing access to memory that is not supposed to be accessible.
The bit size of an ARM processor refers to the width of the data bus. A 32-bit data bus can transfer 4 bytes of data at a time, while a 64-bit data bus can transfer 8 bytes of data. The bit size also determines the maximum addressable memory, so a 32-bit processor can address 4 GB of memory, while a 64-bit processor can address 16 GB of memory.
ARM and Intel processors are both popular choices for embedded systems and mobile devices. ARM processors are typically more power-efficient than Intel processors, but they may not offer the same level of performance. In terms of instruction sets, both ARM and Intel processors support a wide variety of instructions, but ARM processors typically have a smaller instruction set than Intel processors. In terms of performance, ARM processors are typically slower than Intel processors, but they consume less power, which can be important in mobile devices. In terms of cost, ARM processors are typically less expensive than Intel processors. In terms of memory, both ARM and Intel processors support a wide variety of memory types, but ARM processors typically have less cache memory than Intel processors.
Mode switching is used to change the state of the processor in order to run different types of code. For example, you might have a processor that is in user mode most of the time, but when it needs to run a privileged instruction, it will switch to supervisor mode. This allows the processor to maintain security by only allowing certain types of code to run in privileged mode.
ARM Processors are used in a wide range of devices, from phones to tablets to wearables. They are known for their low power consumption and high performance. If you are interviewing for a position that uses ARM Processors, it is important to be prepared to answer questions about them. In this article, we will review some of the most common ARM Processor interview questions and how you should answer them.
Here I have tried to create some collection of “embedded system interview questions with answers” that might ask by your interviewer. These embedded system questions not only for fresher but also good for the experienced person.
This article is mainly focused on the most repeatedly asked embedded system interview questions. If you are looking for “embedded system interview questions” or “simple questions on embedded systems”, then you at the right place.
I hope these embedded system interview questions with the answer will be helpful. If you have any other important questions relate to the embedded systems and concepts or want to give the answer to any mentioned embedded systems interview questions, then please write in the comment box. It is helpful to others.
In general, a bootloader is a code that executes at the instant the CPU comes out of reset until it passes off control of the system to the OS. It performs basic initialization of the CPU and sometimes some other peripheral devices, such as disk subsystems, sometimes network controllers, perhaps timers, DMA controller, video controller, UART(s), etc. Sometimes it can have an interactive component, or it might be completely invisible.
It is an important question that is asked by the interviewer to test the understanding of Interrupt. Basically, interrupt latency is the number of clock cycles that are taken by the processor to respond to an interrupt request. This number of the clock cycle is count between the assertions of the interrupt request and the first instruction of the interrupt handler.
Explain what is embedded system in a computer system?
An embedded system is a computer system that is part of a larger system or machine. It is a system with a dedicated function within a larger electrical or mechanical system.
Why embedded system is useful?
With embedded system, it is possible to replace dozens or even more of hardware logic gates, input buffers, timing circuits, output drivers, etc. with a relatively cheap microprocessor.
FAQ
Why is ARM Cortex preferred compared to other architecture?
Which ARM processor is used for real-time application?
What are the three categories of ARM processors?
