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Microprocessor

Microprocessor
Which of the following instruction will never affect the zero flag?

 DCX Rp
 DCR R
 XRA R
 ORA R

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Microprocessor
If the number of address bits in a memory is reduced by 2 and the addressability is doubled, the size of the memory (i.e., the number of bits stored in the memory)

Increases by 2^(address bits)/addressability
Remains unchanged
Doubles
Halves

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Microprocessor
What is mean by ALU

 Arithmetic logic unsigned
 Arithmetic local unsigned
 Arithmetic logic unit
 Arithmetic logic upgrade

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Microprocessor
In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is

Arithmetic, relational, assignment
Arithmetic, assignment, relational
Assignment, relational, arithmetic
Relational, assignment, arithmetic

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Microprocessor
The length of bus cycle in 8086/8088 is four clock cycles, T1, T2, T3, T4 and an indeterminate number of wait state clock cycles denoted by Tw. The wait states are always inserted between

 T3 & T4
 T4 & T1
 T2 & T3
 T1 & T2

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Microprocessor
The timing difference between a slow memory and fast processor can be resolved if

Neither A nor B
Either A or B
Processor is capable of waiting
External buffer is used

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