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Microprocessor

Microprocessor
In order to complement the lower nibble of accumulator one can use

 ANI 0FH
 CMA
 ORI 0FH
 XRI 0FH

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Microprocessor
The ROM programmed during manufacturing process itself is called

 MROM
 EPROM
 EEPROM
 PROM

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 A is false but R is true
 Both A & R are true and R is the correct explanation of A
 Both A & R are true but R is not the correct explanation of A
 A is true but R is false

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Microprocessor
The microprocessor issues ALE during first T-state of

 every machine cycle
 memory READ cycle only
 fetch cycle only
 memory WRITE cycle only

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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

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

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Microprocessor
Which one of the following ICs is used to interface keyboard and display?

 8253
 8251
 8279
 8259

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