1. A microprocessor always has which of the following components on the chip its A. UART Check for correct B. CPU C ROM choices D. Timers 2. Which of the following buses are always bi-directional? A. All control buses. B. The address bus C The data bus D. Data bus and address bus 3. The 8051 carry flag is set whenever A. there is a carry from the D3 to the D4 bit B there is a carry beyond the D7 bit C. the A register contains an odd number of 1s D. the A register contains an even number of 1s 4. Find the organization and chip capacity for ROM with 12 address pins and 4 data pins. A. 4K x 12, 48K bits B. 16K x4, 48K bits C. 8K x 4, 32K bits D. HK x 4, 16K bits 5. Which of the following registers can be used for register indirect addressing mode? A. RO and R1 B. RO and R7 C. R6 and R7 D. R5 and R3