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1 | | Communication is the process of exchanging information. |
| | A) | True |
| | B) | False |
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2 | | All electronic communication systems have a transmitter, a communication channel or medium, and an antenna. |
| | A) | True |
| | B) | False |
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3 | | A receiver is a collection of electronic components and circuits that accepts the transmitted message from the channel and converts it to a form understandable to humans. |
| | A) | True |
| | B) | False |
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4 | | Optical media communication channels are used for audio or video analog signals. |
| | A) | True |
| | B) | False |
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5 | | Examples of transceivers include televisions, fax machines, cellular telephones, and computer modems. |
| | A) | True |
| | B) | False |
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6 | | Simplex communication refers to a one-way transmission type system. |
| | A) | True |
| | B) | False |
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7 | | A digital signal is a smoothly and continuously varying voltage or current. |
| | A) | True |
| | B) | False |
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8 | | Modulation makes the information signal more compatible with the medium. |
| | A) | True |
| | B) | False |
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9 | | Demodulation is the process of having a baseband voice, video, or digital signal modify another, higher-frequency signal, the carrier. |
| | A) | True |
| | B) | False |
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10 | | A modem can be used to translate data from digital to analog only. |
| | A) | True |
| | B) | False |
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11 | | De-multiplexing is the process of allowing two or more signals to share the same medium or channel. |
| | A) | True |
| | B) | False |
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12 | | The range of electromagnetic signals encompassing all frequencies is referred to as the electromagnetic spectrum. |
| | A) | True |
| | B) | False |
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13 | | Wavelength is the distance occupied by two cycles of a wave. |
| | A) | True |
| | B) | False |
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14 | | The wavelength of a signal is calculated by dividing the speed of light by the frequency of the wave. |
| | A) | True |
| | B) | False |
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15 | | Low frequencies are in the 30- to 300-KHz range. |
| | A) | True |
| | B) | False |
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16 | | In electronic communication systems, the message is referred to as parity. |
| | A) | True |
| | B) | False |
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17 | | The communication channel is the medium by which the electronic signal is sent from place to place. |
| | A) | True |
| | B) | False |
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18 | | A receiver is a collection of electronic components and circuits that accepts the transmitted message from the channel and converts is back to a form understandable by humans. |
| | A) | True |
| | B) | False |
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19 | | Analog signals vary continuously. |
| | A) | True |
| | B) | False |
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20 | | Modulation allows more than one signal to be transmitted concurrently over a single medium. |
| | A) | True |
| | B) | False |
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