| 1. | In memory-mapped I/O… |
| a. | The I/O devices and the memory share the same address space |
| b. | The I/O devices have a seperate address space |
| c. | The memory and I/O devices have an associated address space |
| d. | A part of the memory is specifically set aside for the I/O operation |
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Answer: (a).The I/O devices and the memory share the same address space
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| 2. | The usual BUS structure used to connect the I/O devices is |
| a. | Star BUS structure |
| b. | Multiple BUS structure |
| c. | Single BUS structure |
| d. | Node to Node BUS structure |
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Answer: (c).Single BUS structure
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| 3. | The advantage of I/O mapped devices to memory mapped is |
| a. | The former offers faster transfer of data |
| b. | The devices connected using I/O mapping have a bigger buffer space |
| c. | The devices have to deal with fewer address lines |
| d. | No advantage as such |
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Answer: (c).The devices have to deal with fewer address lines
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| 4. | The system is notified of a read or write operation by |
| a. | Appending an extra bit of the address |
| b. | Enabling the read or write bits of the devices |
| c. | Raising an appropriate interrupt signal |
| d. | Sending a special signal along the BUS |
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Answer: (d).Sending a special signal along the BUS
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| 5. | To overcome the lag in the operating speeds of the I/O device and the processor we use |
| a. | Buffer spaces |
| b. | Status flags |
| c. | Interrupt signals |
| d. | Exceptions |
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Answer: (b).Status flags
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| 6. | The method of accessing the I/O devices by repeatedly checking the status flags is |
| a. | Program-controlled I/O |
| b. | Memory-mapped I/O |
| c. | I/O mapped |
| d. | None of the above |
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Answer: (a).Program-controlled I/O
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| 7. | The method of synchronising the processor with the I/O device in which the device sends a signal when it is ready is |
| a. | Exceptions |
| b. | Signal handling |
| c. | Interrupts |
| d. | DMA |
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Answer: (c).Interrupts
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| 8. | The method which offers higher speeds of I/O transfers is |
| a. | Interrupts |
| b. | Memory mapping |
| c. | Program-controlled I/O |
| d. | DMA |
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Answer: (d).DMA
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| 9. | The process where in the processor constantly checks the status flags is called as |
| a. | Polling |
| b. | Inspection |
| c. | Reviewing |
| d. | Echoing |
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Answer: (a).Polling
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| 10. | The interrupt-request line is a part of the |
| a. | Data line |
| b. | Control line |
| c. | Address line |
| d. | None of the above |
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Answer: (b).Control line
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