Microprocessor
I)A total of about one million bytes can be directly addressed by the 8086 microprocessor II)8086 has thirteen 16-bit registers III)8086 has eight flags IV)Compared to 8086, the 80286 provides a higher degree of memory protection Which one of the statements given above are correct?

 1,2 & 3
 1,2 & 4
 2,3&4
 1,3 &4

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Microprocessor
Cycle stealing mode of DMA operation involves

 Data transfer takes place between the I/O device and memory during every alternate clock cycle
 While the microprocessor is executing a program an interface circuit takes over control of address, data, control buses when not in use by microprocessor
 DMA controller taking over the address, data and control buses while a block of data is transferred between memory and I/O device
 The DMA control waiting for the microprocessor to finish execution of the program and then takes over the buses

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Microprocessor
PUSH B instruction in 8085 microprocessor causes

 registers B & C to be cleared
 the contents of register B only to be copied in the stack
 the contents of register B & C to be copied in the stack
 the contents of registers B & C to be transferred in the stack and and the registers get cleared

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