Technical interview questions and answers are essential for Micro Processor Interviews because companies want to evaluate your understanding of CPU architecture, instruction sets, registers, addressing modes, interrupts, and memory hierarchy. Microprocessor fundamentals are crucial for electronics, embedded systems, and computer engineering interviews. Companies like TCS, Infosys, Wipro, Cognizant, and Capgemini frequently include microprocessor questions in placement tests and technical rounds. This guide provides the most important Micro Processor interview questions with clear explanations to help freshers and engineering students strengthen their basics. Preparing these questions will boost your confidence during hardware-related interviews, lab-oriented assessments, and competitive exams.
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1. What are the various registers in 8085?
Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085 .
2. In 8085 name the 16 bit registers?
Stack pointer and Program counter all have 16 bits.
3. 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.
4. What is Program counter?
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.
5. Which Stack is 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.
6. What happens when HLT instruction is executed in processor?
The Micro Processor enters into Halt-State and the buses are tri-stated.
7. What is meant by a bus?
A bus is a group of conducting lines that carriers data, address, & control signals.
8. 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.
9. Give an example of one address microprocessor?
is a one address microprocessor.
10. In what way interrupts are classified in 8085?
In 8085 the interrupts are classified as Hardware and Software interrupts.