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

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Microprocessor
DS directive in 8085

Forces the assembler to reserve one byte of memory
Forces the assembler to reserve a specified number of consecutive bytes in the memory
None of these
Forces the assembler to reserve a specified number of bytes in the memory

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Microprocessor
A high on RESET OUT signifies that

 all the registers and counters are being reset and this signal can be used to reset external support chip
 all the registers and counters are being reset
 all the registers of the CPU are being reset
 processing can begin when this signal goes high

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