$1-$ The process of coding multiplexer output into electrical pulses or waveforms for transmission is called Select one:

a$.$ Line coding

b$.$ Amplitude modulation

c$.$ FSK

d$.$ Filtering

$2-$ In $$ Law the practical value of compression is: Select one:

a$.0$

b$.10$

c$.255$

d$.100$

$3-$ For transmission over small distances, PAM would be used only as a means of message processing for time$-$division multiplexing. Select one:

True

False

$4-$ In PCM$,$ the first step after PAM, is coding of the analog pulses. Select one:

True

False

$5-$ PWM is less power$-$efficient than PPM Select one:

True

False