Microprocessor
Assertion(A): The frequency of 8085 system is ½ of the crystal frequency. Reason(R): Microprocessor (8085) requires a two phase clock.

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

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Microprocessor
When referring to instruction words, a mnemonic is

 shorthand for machine language.
 a short abbreviation for the operation to be performed.
 a short abbreviation for the operand address.
 a short abbreviation for the data word stored at the operand address.

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Microprocessor
A high on RESET OUT signifies that

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

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Microprocessor
The stack pointer register in a microprocessor

 holds the address of the top of the stack
 counts the number of programs being executing on the microprocessor
 keeps the address of the next instruction to be fetched
 counts the number of instructions being executing on the microprocessor

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