Session 2a: Frequency Allocation and Modulation Basics

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All 10 questions are mandatory, please finish within 10 minutes

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How many kilohertz (kHz) are equivalent to 2.4 gigahertz (GHz)? *

1 point

2.4*(10^12)

2.4*(10^6)

2.4*(10^9)

2.4*(10^3)

Which channels in the 2.4 GHz frequency band are considered non-overlapping?
*

1 point

1, 2 and 3

1, 6 and 11

2, 4 and 8

3, 6 and 11

What is the frequency range covered by the 6 GHz band?
*

1 point

5.925 GHz to 7.125 GHz

5.625 GHz to 7.125 GHz

5.925 GHz to 7.925 GHz

5.925 GHz to 6.925 GHz

How long is the Barker sequence when the data rate is 1Mbps?
*

1 point

What is the relation between frequency and wavelength?
*

1 point

as frequency increases, wavelength also increases

as frequency increases, wavelength decreases

They are not related to each other

They are always equal to each other

What is quadrature amplitude modulation?
*

1 point

A modulation scheme used to transmit data by varying the amplitude of a signal

A modulation scheme used to transmit data by varying the phase of a signal

A modulation scheme used to transmit data by varying the frequency of a signal

A modulation scheme used to transmit data by varying both the amplitude and phase of a signal

What is the latest modulation technique used in Wi-Fi? *

1 point

DSSS

OFDMA

OFDM

FSSS

What is a guard band?
*

1 point

A guard band separates adjacent communication channels to prevent interference

A guard band is a specialized antenna used in radar systems

A guard band is a measure of signal strength in telecommunications

A guard band is a protective case for electronic devices

What is the use of carrier signal in wireless communication? *

1 point

To share a medium and prevent signal interference.

To provide power to the wireless devices

To encrypt the data

None of the above

Which of the following techniques is used to divide the available bandwidth into multiple subcarriers, where each of these subcarriers carries a separate data stream *

1 point

OFDM

FHSS

FDM

DSSS

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