engineering recuitment NIELIT Scientific Assistant Mock Test 2025 Communication Systems Information Theory Source Coding
In _______ code, symbols 1 and 0 are represented by transmitting pulses of amplitudes + and -.
1
Unipolar return-to-zero
2
Polar nonreturn-to-zero
3
Unipolar nonreturn-to-zero
4
Bipolar return-to-zero