1. | The initial program that is run when the computer is powered up is called : |
Discuss |
Answer: (d).bootstrap program
|
2. | How does the software trigger an interrupt ? |
Discuss |
Answer: (b).Executing a special operation called system call
|
3. | What is a trap/exception ? |
Discuss |
Answer: (b).software generated interrupt caused by an error
|
5. | An interrupt vector |
Discuss |
Answer: (a).is an address that is indexed to an interrupt handler
|
6. | DMA is used for : |
Discuss |
Answer: (d).Both a and c
|
7. | In a memory mapped input/output : |
Discuss |
Answer: (b).the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available
|
8. | In a programmed input/output(PIO) : |
Discuss |
Answer: (a).the CPU uses polling to watch the control bit constantly, looping to see if device is ready
|
9. | In an interrupt driven input/output : |
Discuss |
Answer: (c).the CPU receives an interrupt when the device is ready for the next byte
|
10. | In the layered approach of Operating Systems : |
Discuss |
Answer: (d).Both b and c
|