Truth table-boolean expressions, Algebra

1. Construct a truth table for the following Boolean expressions:

a) ABC + A'B'C'

b) ABC + AB'C' + A'B'C'

c) A (BC' + B'C)

2.  Simplify the following expressions:

a) A•B' + B'•A + C•D•E + C'•D•E + E•C'•D

b) A•B + A•C + B•A

3. How many input and output lines does a multiplexer contain if it has four select lines? Justify your answer.

4. How many output lines does a decoder contain if it has 10 input lines?

Justify your answer.

5. Design a 4-to-1 multiplexer using AND, OR, and NOT gates. HINT: construct a truth table for this multiplexer using a maximum of a 2-bit combinations.

6. Convert 0010 11012 to hexadecimal.

7. What ASCII character is 0110 11012?

8. Two's complement is a method of representing positive and negative integers in binary. Provide the 8-bit two's complement representation of +67 and -67.

Your answers must be 8 bits long.

9. Perform the indicated base conversions:

a) 548 to base 5

b) 3124 to base 7

c) 5206 to base 7

d) 122123 to base 9

10. If processor A has a higher clock rate than processor B, and processor A also has a higher MIPS rating than processor B, explain whether processor A will always execute faster than processor B. Suppose that there are two implementations of the same instruction set architecture. Machine A has a clock cycle time of 20ns and an effective CPI of 1.5 for some program, and machine B has a clock cycle time of 15ns and an effective CPI of 1.0 for the same program. Which machine is faster for this program, and by how much?

11. What does this circuit do?

689_circuit gate.png

Posted Date: 3/4/2013 6:53:40 AM | Location : United States

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