Practice free →
HomeGATE ECEElectronics & CommunicationGATE ECE — Core › Number of select lines for a 16:1 multiplexer:

Number of select lines for a 16:1 multiplexer:

A2
B16
C4 (2^4 = 16 inputs)
D8
Answer & Solution
Correct answer: C. 4 (2^4 = 16 inputs)
For 2^n inputs, MUX needs n select lines. 4:1 → 2. 8:1 → 3. 16:1 → 4. 32:1 → 5. Demux is reverse: 1 input, 2^n outputs, n selects.
Solve this in the app — GATE ECE practice & 24k+ MCQs →
Related questions