5. What type of bus in the 8051 has the same bit width as the program counter register? a. address bus c. control bus b. data bus d. NA 6. Which register of the 8051 points to the next instruction to be executed? a. B-Register c. Data Pointer b. Accumulator d. Program Counter 7. A is a subroutine within another subroutne. a. stacked subroutine c. secondary subroutine b. nested subroutine d. NA 8. Which register(s) can be used as pointers to indirectly address the data? a. RO c. Both RO& R b. R1 d. NA 9. The stack is a section of used by the CPU to store data temporanily a. RAM b. ROM d. N/A 10. What is a subroutine a. a block of code that is called only once in a program b. a block of code that is called zero times in a program c. a block of code that is called more than once in a program d. N/A