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Microprocessor Interview Questions - 5

1. Why are program counter and stack pointer 16-bit registers?
Answer

2. What happens during DMA transfer?
Answer

3. Define ISR.
Answer

4. Define PSW.
Answer

5. What are the execution modes available in x86 processors?
Answer

6. What is meant real mode?
Answer

7. What is protected mode?
Answer

8. What is virtual 8086 mode?
Answer

9. What is unreal mode?
Answer

10. What is the difference between ISR and a function call?
Answer
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