Pulse Code Modulation (PCM) Encoding & Decoding of Continuous Signal

Questionnair

Q.1    There are three sampling methods: __________?
A)    Quantized, Sampled, and Ideal
B)    Ideal, Sampled, and Flat-top
C)    Ideal, Natural, and Flat-top
D)    None of these

Q.2    In decoding a digital signal, the receiver calculates a running average of the received signal power, called the _______?
A)    Baseline
B)    Base
C)    Line
D)    None of these

Q.3   In the mid 20th century, a "codec" was hardware that coded analog signals into ________ (PCM) and decoded them back?
A)    Biploar Coding
B)    Pulse Code Modulation
C)    Non-return to zero
D)    On-off keying

Q.4    The PCM - decoded wave is the real replica of the original wave?
A)    Yes
B)    No
C)    Some part same with distortion
D)    None of these