Definition check – is a multiplexer (MUX) the device that converts a code into a recognizable number or character for display, or is that the specific function of a decoder/driver?

Introduction / Context:
Multiplexers and decoders are foundational MSI logic blocks but serve different roles. The question tests whether a multiplexer is the element that performs code-to-symbol translation for human-readable outputs such as seven-segment displays, or whether that is the decoder’s job.

Given Data / Assumptions:

• Multiplexer: selects one of many data inputs based on select lines; data routing element.
• Decoder/driver: translates coded inputs (for example, BCD) into a specific pattern (for example, seven-segment).
• Recognizable symbols require mapping logic, not mere routing.

Concept / Approach:
A MUX does not interpret codes; it forwards the selected input to the output. In contrast, a BCD-to-7-segment decoder (such as 7447/7448) contains logic that asserts specific segment lines to draw digits 0–9. Therefore, stating that a MUX converts a code to a number or character is incorrect; that function belongs to decoders and display drivers.

Step-by-Step Solution:

Verification / Alternative check:
Examine truth tables: MUX tables specify selection behavior; decoder tables map binary inputs to one-of-N or to segment outputs—explicit code conversion.

Why Other Options Are Wrong:
Marking “Correct” confuses device categories; BCD specifics, enable pins, and display polarity (common-anode/cathode) do not convert a MUX into a decoder.

Common Pitfalls:
Using a MUX to multiplex display digits over time (time-multiplexing) and mistaking that mechanism for code translation; time-multiplexing is about sharing a driver, not generating segment patterns.

Final Answer:
Incorrect