8086 interview questions II

1. Which is the tool used to connect the user and the computer? - Interpreter is the tool used to connect the user and the tool.
2. What is the position of the Stack Pointer after the PUSH instruction? - The address line is 02 less than the earlier value.
3. What is the position of the Stack Pointer after the POP instruction? - The address line is 02 greater than the earlier value.
4. Logic calculations are done in which type of registers? - Accumulator is the register in which Arithmetic and Logic calculations are done.
5. What are the different functional units in 8086? - Bus Interface Unit and Execution unit, are the two different functional units in 8086.
6. Give examples for Micro controller? - Z80, Intel MSC51 &96, Motorola are the best examples of Microcontroller.
7. What is meant by cross-compiler? - A program runs on one machine and executes on another is called as cross-compiler.
8. What are the address lines for the hardware interrupts? -
   

   RST 7.5

   003C H

9. Which Segment is used to store interrupt and subroutine return address registers? - Stack Segment in segment register is used to store interrupt and subroutine return address registers.
10. Which Flags can be set or reset by the programmer and also used to control the operation of the processor? - Trace Flag, Interrupt Flag, Direction Flag.
11. What does EU do? - Execution Unit receives program instruction codes and data from BIU, executes these instructions and store the result in general registers.
12. Which microprocessor accepts the program written for 8086 without any changes? - 8088 is that processor.
13. What is the difference between 8086 and 8088? - The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086.