Data Communication Quiz

Data communication refers to the exchange of data between:

• Two computers

• Two devices through a transmission medium

• Two users only

• Internet only

Which of the following is not an element of a data communication system?

• Sender

• Receiver

• Path loss

• Transmission medium

Data-rate limits in communication are defined by:

• Nyquist theorem & Shannon capacity

• Ohm's law & Kirchhoff's law

• Signal-to-noise ratio only

• Transmission delay

Analog signals are:

• Discrete and finite

• Continuous and time-varying

• Digital signals with noise

• Always binary

A digital signal represents data as:

• Continuous variations

• Pulse amplitudes

• Binary 0s and 1s

• Wave frequency

In simplex communication, transmission occurs:

• Both directions simultaneously

• In one direction only

• In both directions alternately

• Only for digital signals

Half-duplex communication allows:

• Simultaneous transmission both ways

• Transmission one way at a time

• Broadcasting only

• Multiplexing only

Full-duplex communication means:

• No data transmission

• Both directions at the same time

• One way at a time

• Only serial communication

Parallel transmission sends:

• 1 bit at a time

• Multiple bits simultaneously

• Only analog signals

• Binary data sequentially

Serial transmission sends:

• Multiple bits together

• One bit at a time

• No bits at all

• Only ASCII codes