Some common Interview Questions on Microprocessors

• Which type of architecture 8085 has?
• How many memory locations can be addressed by a microprocessor with 14 address lines?
• 8085 is how many bit microprocessor?
• Why is data bus bi-directional?
• What is the function of accumulator?
• What is flag, bus?
• What are tri-state devices and why they are essential in a bus oriented system?
• Why are program counter and stack pointer 16-bit registers?
• What does it mean by embedded system?
• What are the different addressing modes in 8085?
• What is the difference between MOV and MVI?
• What are the functions of RIM, SIM, IN?
• What is the immediate addressing mode?
• What are the different flags in 8085?
• What happens during DMA transfer?
• What do you mean by wait state? What is its need?
• What is PSW?What is ALE? Explain the functions of ALE in 8085.
• What is a program counter? What is its use?
• What is an interrupt?
• Which line will be activated when an output device require attention from CPU?