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Microprocessor

Microprocessor
In a computer the data transfer between hard disk and CPU is nearly the same as that between diskette and CPU.

True
False

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Microprocessor
The relation among IC (Instruction Cycle), FC (Fetch cycle) and EC (Execute Cycle) is

 EC = IC + FC
 IC = FC + EC
 IC = FC + 2EC
 IC = FC - EC

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Microprocessor
The program counter in a 8085 micro-processor is a 16-bit register, because

 It has to fetch two 8-bit data at a time
 It counts 16-bits at a time
 It facilitates the user storing 16-bit data temporarily
 There are 16 address lines

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Microprocessor
Number of Hex digits needed to represent the 20-bit address of a memory location are

 4
 5
 20
 16

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Microprocessor
After RESET 8255 will be in

 mode 0; all ports are input
 mode 0; all ports are output
 unchanged condition
 mode 2

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Microprocessor
In microprocessor based system DMA refers to

 direct memory access for the user
 direct memory access for the I/O device
 direct memory access for microprocessor
None of these

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