2.4 Computational Logic Alt

1.Which of the following statement is FALSE about logic gates?

• A.Logic gates are the building blocks of electronic circuits.
• B.It is used in computer components like memory.
• C.A combination of logic gates is called logic circuit.
• D.A logic gate understands binary language.
• E.None of the above

2.What is a truth table?

• A.A table that denotes the different outputs of the logic gates or circuit with respect to different inputs.
• B.A table that represents how logic gates are combined to form a logic circuit.
• C.A table that shows the input combinations that result in a binary output 1 in a logic gate.

3.A logic circuit has 4 inputs. How many output combinations are possible?

• A.8
• B.16
• C.32
• D.4

4.A logic circuit has n inputs. How many output combinations are possible?

• A.2×n
• B.2n
• C.n÷2

5.Which of the following is FALSE about the NOT gate?

• A.Output of NOT is complementary to the input
• B.When the input to NOT gate is 0, the output is 1.
• C.A NOT gate has two input signals and an output signal.
• D.None of the above

6.When is the output for AND gate TRUE?

• A.When both inputs are TRUE.
• B.When at least one of the inputs is TRUE.
• C.When both inputs are FALSE
• D.When at least one of the inputs is FALSE.

7.When is the output for OR gate TRUE?

• A.When both inputs are TRUE.
• B.When at least one of the inputs is TRUE.
• C.When both inputs are FALSE
• D.When at least one of the inputs is FALSE.

8.An AND gate has two inputs A and B. What is the Boolean expression for this logic gate?

^ = AND

˅ = OR

¬ = NOT

• A.A^B

• B.A˅B

• C.¬A^B

9.What is the Boolean expression for this logic gate?

^ = AND

˅ = OR

¬ = NOT

• A.X=A^B

• B.X=A˅B

• C.X=A*B

10.What is the Boolean expression for this logic gate?

^ = AND

˅ = OR

¬ = NOT

• A.X=˅A

• B.X=&A

• C.X=¬A