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The program counter (PC) in a micro-processor:

counts the number of programs being executed by the microprocessor

counts the number of instructions being executed by the microprocessor

counts the number of interrupts handled by the microprocessor

keeps the address of the next instruction to be fetched

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A bus connected between the CPU and the main memory that permits transfer of information between main memory and the CPU is known as

DMA bus

Memory bus

Address bus

Control bus

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When a program is being executed in an 8085 microprocessor, its program counter contains

The memory address as the instruction that is to be executed next

The memory address of the instruction that is being currently matched

The total number of instructions in the program being executed

The number of instructions in the current program that have already been executed

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The clock frequency of an 8085 microprocessor is 5 MHz. If the time required to execute an instruction is 1.4 ?s, then the number of T-states needed for executing the instruction is

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The status flag that is available in microprocessor 8085, but not available in micro-controller 8051 is:

Carry flag

Overflow flag

Auxiliary flag

Zero flag

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The ALU of a microprocessor performs operations of 8-bit two

Result = D8H, Overflow and negative flags set

Result = D8H, Negative flag is set

Result = D8H, No flags set

Result = 28H, Overflow flag set

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