Q14: Decoders & Encoders#
Time Estimate15-30 minutes Grade Impact0.5% DueSep 21 @ 12pm
Objective
Reinforce an understanding of NAND and NOR universal logic gates.
Free Response Questions#
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What is the difference between a decoder and an encoder in terms of their input signals and output behavior?
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Describe how a priority encoder works and explain how it differs from a standard encoder in terms of input handling and output generation.
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Describe a practical application where a decoder would be used in a digital circuit, and explain how it would function within that context.
Multiple Choice Questions#
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A 3-to-8 decoder has 3 input lines and 8 output lines. If the input is
101, which output line will be activated?- Output line 5
- Output line 6
- Output line 7
- Output line 8
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Which of the following statements about encoders is true?
- An encoder converts multiple input lines into a single output line.
- An encoder converts a single input line into multiple output lines.
- An encoder can only handle one input at a time.
- An encoder is used to decode signals from a digital circuit.
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How many output lines does a 4-to-2 encoder have?
- 2
- 4
- 8
- 16
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What is the purpose of a priority encoder in a digital circuit?
- To prioritize which input signal to encode when multiple inputs are active.
- To decode signals from a digital circuit.
- To convert a single input line into multiple output lines.
- To increase the speed of signal processing in a circuit.
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Which of the following is a sub-component of a decoder?
- Multiplexer
- Flip-flop
- Logic gate
- Register
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Which of the following is a sub-component of an encoder?
- Multiplexer
- Flip-flop
- Logic gate
- Register
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A 2-to-4 decoder is used in a circuit to select one of four output lines based on the input combination. If the inputs are
11, which output line will be activated?- Output line 0
- Output line 1
- Output line 2
- Output line 3