Arm Embedded Software Intern interview questions

• What is Cache? Explain the basics of it and how does it work at hardware level. • Explain cache mapping • Explain cache coherence • What is interrupt? And what does the CPU do when an interrupt occurs? • Explain registers in Arm cortex processor • What is Cache? How does it work? • Explain cache mapping • Explain cache coherence • What is interrupt? And what does the CPU do when an interrupt occurs? • Explain registers in Arm cortex processor • What does r14 register do? • What is context switch and how does it happen? • Explain the usage of Volatile keyword. • Explain the usage of Extern keyword • Explain the usage of Static keyword with examples • What happens if a variable has both extern and static keyword? • What is DMA? • What is MMU? • What is Mutex? What is semaphore? What is the difference between semaphore and a mutex? and few more questions