CTPR2023 - Lecture 2

1. What is the meaning of frequency?

• The distance covered by a wave in one complete cycle.

• The completion of several wave cycles in certain time intervals.

• The measure of how loud a sound is.

• The energy content of an electromagnetic wave

What does it mean by frequency spectrum?

• The range of frequencies in a given signal.

• The number of channels available on a radio.

• The variation of frequency with time.

• The ability to hear different pitches of sound.

Which of the following is true about the relationship between time and frequency?

• As time increases, frequency increases.

• Time and frequency are independent of each other.

• Higher frequency corresponds to shorter time periods.

• Time and frequency have a similar relationship.

The following are factors affecting Quality of Experience (QoE) EXCEPT:

• Network congestion.

• User's device brand.

• Bandwidth availability.

• Interference.

What is the maximum speed expected for 6G?

• 1 Gbps (Gigabit per second).

• 10 Gbps.

• 100 Gbps.

• 1000 Gbps (1 Terabit per second).

What is the lowest frequency that exists?

• 0 Hz (Hertz)

• 1 Hz

• 20 Hz

• 20 kHz (kilohertz)

The maximum frequency that human hearing can detect is?

• 20 Hz (Hertz)

• 20 kHz (kilohertz)

• 20 MHz (megahertz)

• 20 GHz (gigahertz)

Which type of frequency is dangerous?

• Radio

• Microwave

• Visible light

• Gamma rays

Which of the following multiple access schemes is used in 5G?

• Frequency Division Multiple Access (FDMA)

• Code Division Multiple Access (CDMA)

• Orthogonal Frequency Division Multiple Access (OFDMA)

• Time Division Multiple Access (TDMA)

A cognitive radio is ...

• A radio that can change its transmitter parameters based on interaction with the environment in which it operates.

• A radio that operates using artificial intelligence.

• A radio that can transmit signals over a long distance.

• A radio that operates on multiple frequencies simultaneously.