Q1: How long will it take to serially transmit the hexadecimal number C3₁₆ if the clock frequency is 1.5 MHz?

ANS:D - 5.33 s

Here in this question the data are serially transmit right so we will conisder the bits.

Now, (c3) hexa decimal means (1100 0011) right that means no of bits is 8 and the value is c3.

So,
Time = (no of bits/frequency) = 8/ (1.5*10^6) = 5.33 micro seconds.