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Midterm: Introduction to Electronic Communication

Total questions: 21

Worksheet time: 21mins

Name
Class
Date
1.

Who is credited with inventing radio who first discovered radio waves?

a)

Guglielmo Marconi

b)

Heinrich Hertz

c)

Nicola Tesla

d)

James Maxwell

2.

________ is the process of exchanging information.

a)

Communication

b)

Data transfer

c)

Radiology

d)

Transceiver

3.

In electronic communication systems, which of the following is referred to as the intelligent signal or the information?

a)

Message

b)

Data

c)

Transmitter

d)

Receiver

4.

______ is a collection of electronic components and circuits designed to convert the electrical signal to a signal suitable for transmission over a given communication medium.

a)

Receiver

b)

Transmitter

c)

Communication channel

d)

Information

5.

_____ is the general term applied to any phenomenon that degrades or interferes with the transmitted information.

a)

Oscillator

b)

Noise

c)

Interference

d)

Frequency

6.

In electronic communication, _____ are circuits/units that incorporate both send and receive functions.

a)

Transmitter

b)

Transceiver

c)

Two-way

d)

Signal attenuation

7.

______, or degradation, is inevitable in electronic communication no matter what the medium of transmission. It is proportional to the square of the distance between the transmitter and receiver.

a)

Noise

b)

Attenuation

c)

Interference

d)

Signal loss

8.

A ____ is a collection of electronic components and circuits that accepts the transmitted message from the channel and converts it nack to a form understandable by humans.

a)

Transmitter

b)

Receiver

c)

Communications channel

d)

Medium

9.

The _____ is the medium by which the electronic signal is sent from one place to another.

a)

Electrical conductors

b)

Communication channel

c)

Oscillator

d)

Modulator

10.

These are widely used today to carry long-distance calls and all internet communications. The information is converted to digital form that can be used to turn a laser diode off and on at high speeds.

a)

Optical media

b)

Wireless communication

c)

WiFi

d)

Local Area Network

11.

The simplest way in which electronic communication is conducted is one-way communications, normally referred to as _____.

a)

Simplex communication

b)

Full Duplex communication

c)

Half Duplex communication

d)

Analog

12.

People communicating with one another over the telephone can talk and listen simultaneously. This is called _____ communication.

a)

Simplex

b)

Half duplex

c)

Full duplex

d)

Digital

13.

In _____ communication, the communication is two-way, but the direction alternates: the communicating parties take turns transmitting and receiving.

a)

Full duplex

b)

Simplex

c)

Half duplex

d)

Analog

14.

______ is a smoothly and continuously varying voltage or current.

a)

Digital signal

b)

Analog signal

c)

AC signal

d)

DC signal

15.

These type of signals do not vary continuously but change in steps or in discrete increments.

a)

Analog signals

b)

Digital signals

c)

Data

d)

Binary

16.

The baseband information signal, be it audio, video, or data, is normally used to modulate a high-frequency signal called a _______.

a)

Modulator

b)

Multiplexer

c)

Carrier

d)

RF wave

17.

______ is the process of having a baseband voice, video, or digital signal modify another, high-frequency signal, the carrier.

a)

Amplification

b)

Modulation

c)

Transmission

d)

Multiplexing

18.

Electromagnetic signals which are able to travel through space for long distances are also referred to as _____ waves.

a)

Radio frequency

b)

Magnetic

c)

Baseband signal

d)

High frequency

19.

_____ is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.

a)

Amplitude modulation

b)

Frequency modulation

c)

Baseband transmission

d)

Broadband transmission

20.

________ is the process of allowing two or more signals to share the same medium or channel.

a)

Modulation

b)

Multiplexing

c)

Transmission

d)

Amplification

21.

_____ is the process in which the amplitude of the carrier waves varies linearly with message signal.

a)

Amplitude modulation

b)

Frequency modulation

c)

Multiplexing

d)

Transmission