Microprocessor
The relation among IC (Instruction Cycle), FC (Fetch cycle) and EC (Execute Cycle) is

 IC = FC + EC
 IC = FC + 2EC
 IC = FC - EC
 EC = IC + FC

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Microprocessor
In 8085 microprocessor , let the accumulator contains the value 0AH and register C contains the value 05H. After CMP C instruction is executed, the

 zero and carry flags will be reset
 zero and carry flags will be set
 zero flag will be set and carry flag will be reset
 zero flag will be reset and carry flag will be set

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Microprocessor
Which of the following is not true during the execution of an interrupt service routine, which does not contain any EI instructions

 the microprocessor cannot be interrupted by any interrupt
 all interrupts except non-maskable interrupt are disabled
 the microprocessor can be interrupted by a non-mask able interrupt
 the microprocessor cannot be interrupted by any mask able interrupt

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Microprocessor
Assertion(A): Monostablemultivibrators (IC74121) are used in a microprocessor based system for frequency measurement. Reason(R): Microprocessor counts the number of interrupt signals/second or within a specified interval through ISR.

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

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