1. What is Stack Pointer?

Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack.

2. What are the various flags used in 8085?

Sign flag, Zero flag, Auxillary flag, Parity flag, Carry flag.

3. In 8085 name the 16 bit registers?

Stack pointer and Program counter all have 16 bits.

4. What is the strength of the signal transmitted by powerful cell phones?

The powerful cell phones can transmit a signal of 3 watts.

5. What does Quality factor mean?

The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.

the quality factor is measurement of efficiency(or effectiveness) of a device or circuitry.In literal sense quality factor means qualitative performance of a device.

6. Which interrupt is not level-sensitive in 8085?

RST 7.5 is a raising edge-triggering interrupt.


7. What is Program counter in 8085?

Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.

8. Which is the Stack used in 8085?

LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.

9. What is meant by a bus?

A bus is a group of conducting lines that carriers data, address, & control signals.

A bus is two or many wire communication method.A bus which communicate between two active devices,it may transfer address,data,etc.

10. What is Tri-state logic?

Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.

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