Difficulty: Easy
Correct Answer: noncoded information into coded form
Explanation:
Introduction / Context:
Encoders and decoders are complementary building blocks used in keyboards, communication, and multiplexing systems. Knowing their direction of conversion is key for correct application.
Given Data / Assumptions:
Concept / Approach:
An encoder compresses multiple input lines (often one-hot) into a smaller set of binary outputs. Conversely, a decoder expands binary inputs into multiple output lines. Level inversion (HIGH to LOW) is unrelated to encoding.
Step-by-Step Solution:
Identify device: encoder.Function: map many inputs to fewer binary outputs.Result: noncoded → coded.
Verification / Alternative check:
Example: a 10-to-4 keypad encoder maps ten keys to a 4-bit code.
Why Other Options Are Wrong:
“Coded to noncoded”: that is a decoder's job.“HIGHs to LOWs” / “LOWs to HIGHs”: describe inversion or logic-level translation, not encoding.
Common Pitfalls:
Confusing priority encoders (which also resolve multiple simultaneous inputs) with decoders.
Final Answer:
noncoded information into coded form
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