6. To start executing a computer, the start address of program is loaded into A. MBR C. PC B. MAR D. accumulator What is the maximum directly addressable memory capacity (in bytes) if the address bus is 11 bits? ( remember that 210-1024-1 K) 7. A. 2 Kbytes C. 10 KBytes B. 4 Kbytes D. 20 Kbytes For a processor with a 30-bit address bus and a 32-bit data bus, how many bits are needed for the program counter? 8. A. 64 C. 30 B. 16 D. 32 9. What is the twos complement representation of-11 A 1111 0101 C 1000 1011 B. 1111 0001 10. What is the range of unsigned numbers that can be represented in binary using &-bits? A. 0 to 255 C -128 to 128 B. -128 to 127 D. 0 to 256