Learning Guide Unit 1

Question 1

What are the 4 primary types of logic gates?

Answer 1

NOT, AND, OR, Exclusive-OR (XOR)

Question 2

Which gate is sometimes referred to as an inverter?

Answer 2

The NOT gate

Question 3

Which gate is the only gate of the 4 primary that has a single input?

Answer 3

The Not gate

Question 4

Outputs a logic 1 if any of its inputs are a logic 1.

Answer 4

OR Gate

Question 5

This gate only outputs a logic of 0 if all of its inputs are logic 0.

Answer 5

OR Gate

Question 6

” “ count the number of ones being input to a circuit and output logic 1 or 0 based on whether the number of ones is odd or even.

Answer 6

Parity checkers

Question 7

The “ “ gate counts the number of ones at its input and outputs a logic 1 for an odd count and a logic 0 for an even count.

Answer 7

Exclusive-OR (XOR)

Question 8

The inverter has “one” input and “ “ output.

Answer 8

One input and one output.

Question 9

The XOR gate’s output is set to logic 1 if there are an “ “ number of ones being input to the circuit.

Answer 9

Odd

Question 10

What condition will cause the AND gate to output a logic 0?

Answer 10

If any inputs equal zero. It does not matter what the other inputs are.

Question 11

If any input to an “ “ gate is one, the output is 1.

Answer 11

OR gate. The only time an OR gate outputs a 0 is when all of the inputs are set to 0.

Question 12

” “ connects multiple logic gates by using the outputs from some of the gates as inputs to others.

Answer 12

Combinational Logic

Question 13

AND gate + NOT gate = ?

Answer 13

NAND gate

Question 14

OR gate + NOT gate = ?

Answer 14

NOR gate

Question 15

What law is this? The results of the boolean operations AND and OR are the same regardless of the order of their operands.

Answer 15

Commutative Law
A + B = B + A
A · B = B · A

Question 16

What law is this? The results of the boolean operations AND and OR with three or more operands are the same regardless of which pair of elements are operated on first.

Answer 16

Associative Law
A + (B + C) = (A + B) + C
A · (B · C) = (A · B) · C

Question 17

What law is this? The AND’ing of an operand with an OR expression is equivalent to OR’ing the results of an AND between the first operand and each operand within the OR expression.

Answer 17

Distributive Law
A · (B + C) = A · B + A · C

Question 18

True or False:
A two-input XOR gate outputs a 1 if its inputs are different and a 0 is its inputs are the same.

Answer 18

True.