How many outputs would two 8-line-to-3-line encoders, expanded to a 16-line-to-4

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Question
How many outputs would two 8-line-to-3-line encoders, expanded to a 16-line-to-4-line encoder, have?
Options
A. 3
B. 4
C. 5
D. 6

Correct Answer

4

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Combinational Logic Circuits problems

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5. Two 4-bit binary numbers (1011 and 1111) are applied to a 4-bit parallel adder. The carry input is 1. What are the values for the sum and carry output?
Options
A. ∑₄∑₃∑₂∑₁ = 0111, C_out = 0
B. ∑₄∑₃∑₂∑₁ = 1111, C_out = 1
C. ∑₄∑₃∑₂∑₁ = 1011, C_out = 1
D. ∑₄∑₃∑₂∑₁ = 1100, C_out = 1

6. Looping on a K-map always results in the elimination of:
Options
A. variables within the loop that appear only in their complemented form.
B. variables that remain unchanged within the loop.
C. variables within the loop that appear in both complemented and uncomplemented form.
D. variables within the loop that appear only in their uncomplemented form.

7. Which of the following is an important feature of the sum-of-products form of expressions?
Options
A. All logic circuits are reduced to nothing more than simple AND and OR operations.
B. The delay times are greatly reduced over other forms.
C. No signal must pass through more than two gates, not including inverters.
D. The maximum number of gates that any signal must pass through is reduced by a factor of two.

10. What will a design engineer do after he/she is satisfied that the design will work?
Options
A. Put it in a flow chart
B. Program a chip and test it
C. Give the design to a technician to verify the design
D. Perform a vector test

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