Written Paper Section III Question 25 from the 2003 HSC Examination
Summary: (a) Explain how a fraction is represented in single precision floating point binary representation. Convert a decimal number to a hexadecimal number. Using four-bit binary representation and two's complement to perform a subtraction. (b) Describe the function of a flip-flop and explain how it achieves its purpose. Draw a truth table for the AND gate and a flowchart to describe the logic of an OR gate. (c) Compare and contrast the data stream sent from the scanner to the central computer with the data stream that would be sent from the central computer to the door in the scenario.