Which of the following is best suited for interactive transfer of data

in a time$-$sharing system?

A$)$ simplex lines

half duplex lines

C$)$ full duplex lines

D$)$ double flex lines

E$)$ none of the mentioned

For a transmission at a data rate of $4$Mbit$\frac{s}{sec}$ in a base$-$band

transmission channel, what is the minimum required bandwidth

when BPSK $($modulation level$=2)$ is used?

A$)2MHz$

B$)1MHz$

C$)0\mathrm{.}5MHz$

D$)0\mathrm{.}25MHz$

E$)0\mathrm{.}125MHz$

What could be the reason for data to be corrupted while being

exchanged between computers?

A$)$ Temperature of environment

B$)$ Distance between the computers

C$)$ Topology of the earth

D$)$ Weather conditions

E$)$ All the mentioned

If the sum of the data rates of the sending devices is $x,$ what

should be the data rate capacity of the transmission medium to

implement the TDM $($time division multiplexing$)?$

A$)$ less than $x$

B$)$ greater than $x$

C$)$ one talf $x$

D$)$ two times $x$

E$)$ none of the mientioned

Asst. Prot. Suzan ORETEN