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Embedded linux developer Interview Questions

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Explain what happens when an interrupt occurs.

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- The current contents of registers are placed on the stack. - The current program address is placed on the stack. - The Interrupt Vector Table is checked to determine the source of the interrupt, and which Interrupt Service Routine it should go to. - At the end of the ISR, the interrupt flag must be cleared for normal operation to continue.

What is a watchdog timer?

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Linux questions, specifically about system startup and systemd. I was asked the standard questions about priority inversion, deadlock, etc. There was one coding exercise - write a C function that mirrors the bits in a byte.

Describe what you've done with < insert technology listed on resume >

What do specific keywords mean in C? (I.e. static, const, volatile, etc.)

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Explain Muti-threading, scheduling concepts for implementing any applications ?

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