# Quiz #2

8 March, 1994

This is an open books, open notes exam to be turned in by 8:30
PM. No calculators may be used during this quiz!

## Problem 1. (15 points)

On the back of this page, draw a very abstract block diagram for
a 3x8 decoder with an enable input. Don't show any gates. Only show
the input and output wires.

## Problem 2. (25 points)

On the back of this page, show how you construct a 16-to-1
multiplexer out of five 4-to-1 multiplexers.

## Problem 3. (12 points)

How many address lines and data lines are needed for a 16Kx32
memory?

## Problem 4. (12 points)

Convert the decimal number 201 into a binary number.

## Problem 5. (12 points)

Convert the binary number 10110111001 into a decimal number.

## Problem 6. (12 points)

Convert -105 in a 10 bit two's complement binary number.

## Problem 7. (12 points)

Convert the decimal number 91.25 into a binary number with a
binary point.