Techincal Interview Questions - Microprocessor questions

MICROPROCESSOR QUESTIONS

· 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?