Question 1

If you apply DeMorgan's theorem to the expression  you get:

Accepted Answer

A)   
B)   
C)   
D)   E) A) and B)
F) A) and C)

Question 2

The logic gate that generates a LOW (0)  output when any one of its inputs are HIGH (1)  is the:

Accepted Answer

A)   NOR gate.
B)   OR gate.
C)   NAND gate.
D)   AND gate.E) B) and D)
F) C) and D)

Question 3

Any logic expression can be implemented using NAND gates.

Accepted Answer

A) True 
 B)False

Question 4

Logically, the output of a NOR gate would have the same Boolean expression as a(n) :

Accepted Answer

A)   NAND gate immediately followed by an inverter.
B)   AND gate immediately followed by an inverter.
C)   NOR gate immediately followed by an inverter.
D)   OR gate immediately followed by an inverter.E) B) and D)
F) A) and D)

Question 5

Which of the following logical operations is represented by the + sign in Boolean algebra?

Accepted Answer

A)   Inversion
B)   AND
C)   OR
D)   ComplementationE) None of the above
F) B) and D)

Question 6

A ___________is used to illustrate the various input/output combinations for a logic gate.

Accepted Answer

A)   logic function diagram
B)   Boolean formula
C)   Boolean diagram
D)   truth tableE) C) and D)
F) A) and C)

Question 7

In Boolean algebra, the commutative laws indicate that:

Accepted Answer

A)   the factoring of Boolean expressions requires the multiplication of product terms that contain like variables.
B)   the order in which we OR or AND two variables does not affect the result.
C)   an expression can be expanded by multiplying term by term just the same as in ordinary algebra.
D)   we can group variables in an AND or in an OR expression any way we want.E) None of the above
F) All of the above

Question 8

An AND gate with inverters on each of its inputs is equivalent to a _______gate.

Accepted Answer

The answer of An AND gate with inverters on each...

Question 9

Suppose that a logic gate has 3 inputs. How many possible input combinations must be listed in its accompanying truth table?

Accepted Answer

A)   210 
B)   410 
C)   810 
D)   1610E) B) and C)
F) B) and D)

Question 10

The basic logic device that always has a single input is the:

Accepted Answer

A)   OR gate.
B)   AND gate.
C)   Comparator.
D)   Inverter.E) B) and C)
F) A) and C)

Question 11

How many truth table entries are required for a four- input circuit?

Accepted Answer

A)   8
B)   4
C)   12
D)   16E) C) and D)
F) B) and D)

Question 12

The logic gate that generates a HIGH (1)  output only when all of its inputs are LOW (0)  is the:

Accepted Answer

A)   NAND gate.
B)   NOR gate.
C)   OR gate.
D)   AND gate.E) A) and B)
F) All of the above

Question 13

An_______has only a single input.

Accepted Answer

The answer of An_______has only a single input....

Question 14

One of DeMorgan's theorems states that  Simply stated, this means that logically there is no difference between:

Accepted Answer

A)   a NOR gate and a NAND gate with inverted inputs.
B)   a NOR gate and an AND gate with inverted inputs.
C)   an AND gate and a NOR gate with inverted inputs.
D)   a NAND gate and an OR gate with inverted inputs.E) A) and D)
F) A) and C)

Question 15

The basic logic circuit whose output equals the Boolean algebraic sum of its input is the:

Accepted Answer

A)   Inverter.
B)   AND gate.
C)   OR gate.
D)   Comparator.E) A) and D)
F) A) and B)

Question 16

A certain logic gate has three inputs. The output goes LOW (0)  only when the inputs are A = 1, B =

Accepted Answer

A)   AND gate.
B)   NOR gate.
C)   NAND gate.
D)   none of the aboveE) A) and B)
F) None of the above

Question 17

Select the Boolean expression that is the logical equivalent to the expression  .

Accepted Answer

A)   ABC
B)   
C)   A + B + C
D)   E) A) and B)
F) A) and C)

Question 18

An active signal applied to a control input is used to _______the circuit.

Accepted Answer

The answer of An active signal applied to a control...

Question 19

Which of the following gates generates the exact inverse output of the OR gate for all possible input combinations?

Accepted Answer

A)   NOT
B)   NOR
C)   NAND
D)   ANDE) None of the above
F) All of the above

Question 20

A minimum of three 2- input NOR gates would be required to perform the logical operation of a single 2- input AND gate.

Accepted Answer

A) True 
 B)False

Exam 3: Describing Logic Circuits

An active signal applied to a control input is used to _______the circuit.

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A minimum of three 2- input NOR gates would be required to perform the logical operation of a single 2- input AND gate.

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Which of the following gates generates the exact inverse output of the OR gate for all possible input combinations?

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One of DeMorgan's theorems states that Simply stated, this means that logically there is no difference between:

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Select the Boolean expression that is the logical equivalent to the expression .

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How many truth table entries are required for a four- input circuit?

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Logically, the output of a NOR gate would have the same Boolean expression as a(n) :

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The logic gate that generates a LOW (0) output when any one of its inputs are HIGH (1) is the:

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A certain logic gate has three inputs. The output goes LOW (0) only when the inputs are A = 1, B =

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An AND gate with inverters on each of its inputs is equivalent to a _______gate.

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The basic logic circuit whose output equals the Boolean algebraic sum of its input is the:

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The logic gate that generates a HIGH (1) output only when all of its inputs are LOW (0) is the:

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An_______has only a single input.

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If you apply DeMorgan's theorem to the expression you get:

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The basic logic device that always has a single input is the:

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Which of the following logical operations is represented by the + sign in Boolean algebra?

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A ___________is used to illustrate the various input/output combinations for a logic gate.

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In Boolean algebra, the commutative laws indicate that:

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Suppose that a logic gate has 3 inputs. How many possible input combinations must be listed in its accompanying truth table?

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Any logic expression can be implemented using NAND gates.

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