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Microprocessor

Microprocessor
Identify the programmable DMA controller from the following

 8257
 8251
 8253
 8279

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Microprocessor
Which one of the following statement is false?

 A microprocessor has bi-directional data bus
 A microprocessor has bi-directional address bus
 A microprocessor has unidirectional address bus
 A microprocessor has an ALU

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Microprocessor
The operations executed by two or more control units are referred as

 Micro-operations
 Macro-operations
 Multi-operations
 Bi control-operations

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Microprocessor
If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative number the result is

Either A or B depending on the actual number
A smaller floating point number
A larger floating point number
A negative floating point number

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Microprocessor
The number of output pins in 8085 microprocessors are

 19.
 21.
 27.
 40.

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Microprocessor
During which T-state, contents of OP code from memory are loaded into IR (Instruction Register)?

 T4 OP code fetch
 T2 OP code fetch
 T1 OP code fetch
 T3 OP code fetch

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