1. If 4 bits are used to differentiate light intensity of an LED how many levels
ID: 3867056 • Letter: 1
Question
1. If 4 bits are used to differentiate light intensity of an LED how many levels of intensity are possible __________.
2. When an I/O device or timer needs attention a __________________occurs.
3. When a single processor system switches from thread A to thread B it must save pointers and registers from thread A in a __________ __________ ____________.
4. What device is located between the system bus and peripheral devices which relieves the CPU from knowing how to communicate with and control the peripheral devices. _______________
5. DMA devices access _______________ directly.
6. The control unit is used to determine the _________________of instruction execution.
Explanation / Answer
Dear Student,
Here are the answers...
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Answer 1: If 4 bits are used to differentiate light intensity of an LED how many levels of intensity are possible?
Ans = 16
explanation: 4 bit = 24 = 16 combination.
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Answer No: 2 When an I/O device or timer needs attention a interrupt occurs.
Explanation: In microprocessor an interrupt is a signal to the processor which is generated by hardware or software indicating an event that needs immediate attention.
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Answer No: 3: When a single processor system switches from thread A to thread B it must save pointers and registers from thread A in a context switch.
Explanation: A context switch saves the process state so later on the process can be resumed from the same state where it had stopped.
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Answer No: 4: PCI( Peripheral Component Interconnect) is located between the system bus and peripheral devices which relieves the CPU from knowing how to communicate with and control the peripheral devices.
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Answer No:5: DMA devices access data from the memory directly.
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Answer No: 6: The control unit is used to determine the result of instruction execution.
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Kindly Check and Verify Thanks...!!!
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