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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