1) Assume a is a variable of type int. Which of the expressions below always has the same value as the expression ~a?

a)a ^ -1

b)-(!a)

c)a - 1

d)!a

2) Assume ints are 12 bits wide. What bit pattern is stored in i?

int i = 0xF15 && 0xE24;

a) 0xD39

b) 0xE04

c)0x000

d) 0x001

3) Assuming numbers are stored in 6 bits using two's complement encoding, what base 10 number is represented by the bit pattern 100100?

a) 16

b) 36

c) -4

d) -28