I. Multiplexing Types and Principles
1. Q: What type of multiplexing is OFDM (Orthogonal Frequency-Division
Multiplexing)?
A: Digital.
2. Q: What is the basic principle of OFDM?
A: It uses Orthogonal Subchannels to transmit data.
3. Q: What type of multiplexing is TDM (Time-Division Multiplexing)?
A: Digital.
4. Q: What is the basic principle of TDM?
A: It divides the channel into specific Time Slots.
5. Q: What type of multiplexing is STDM (Synchronous Time Division
Multiplexing)?
A: Digital.
6. Q: What is the basic principle of STDM?
A: It uses Fixed and Synchronized time intervals for each input source.
7. Q: What type of multiplexing is ATDM (Asynchronous Time Division
Multiplexing)?
A: Digital.
8. Q: What is the basic principle of ATDM?
A: It uses Variable time intervals, randomly allocating slots based on the data
generation rate.
, 9. Q: What type of multiplexing is FDM (Frequency-Division
Multiplexing)?
A: Analog or Digital.
10.Q: What is the basic principle of FDM?
A: It divides the available bandwidth into distinct Frequency bands.
11.Q: What type of multiplexing is DWDM (Dense Wavelength-Division
Multiplexing)?
A: Optical.
12.Q: What is the basic principle of DWDM?
A: It utilizes a Dense set of wavelengths (light colors) to travel down a single
fiber.
13.Q: What type of multiplexing is CDM (Code-Division Multiplexing)?
A: Digital.
14.Q: What is the basic principle of CDM?
A: It assigns Unique Codes to each channel, allowing them to share the same
frequency simultaneously.
II. Electrical and Signal Concepts
15.Q: What is the difference between Resistance and Impedance?
A: * Resistance ($\Omega$): Opposition to Direct Current (DC); affected by
cable length.
o Impedance ($Z$): Opposition to Alternating Current (AC);
affected by frequency, induction, and capacitance.
16.Q: What is Peak Amplitude?
A: The absolute value of a signal's greatest magnitude relative to the energy it
carries.
17.Q: How are Frequency and Wavelength defined?
A: * Frequency: The number of complete cycles per second.
1. Q: What type of multiplexing is OFDM (Orthogonal Frequency-Division
Multiplexing)?
A: Digital.
2. Q: What is the basic principle of OFDM?
A: It uses Orthogonal Subchannels to transmit data.
3. Q: What type of multiplexing is TDM (Time-Division Multiplexing)?
A: Digital.
4. Q: What is the basic principle of TDM?
A: It divides the channel into specific Time Slots.
5. Q: What type of multiplexing is STDM (Synchronous Time Division
Multiplexing)?
A: Digital.
6. Q: What is the basic principle of STDM?
A: It uses Fixed and Synchronized time intervals for each input source.
7. Q: What type of multiplexing is ATDM (Asynchronous Time Division
Multiplexing)?
A: Digital.
8. Q: What is the basic principle of ATDM?
A: It uses Variable time intervals, randomly allocating slots based on the data
generation rate.
, 9. Q: What type of multiplexing is FDM (Frequency-Division
Multiplexing)?
A: Analog or Digital.
10.Q: What is the basic principle of FDM?
A: It divides the available bandwidth into distinct Frequency bands.
11.Q: What type of multiplexing is DWDM (Dense Wavelength-Division
Multiplexing)?
A: Optical.
12.Q: What is the basic principle of DWDM?
A: It utilizes a Dense set of wavelengths (light colors) to travel down a single
fiber.
13.Q: What type of multiplexing is CDM (Code-Division Multiplexing)?
A: Digital.
14.Q: What is the basic principle of CDM?
A: It assigns Unique Codes to each channel, allowing them to share the same
frequency simultaneously.
II. Electrical and Signal Concepts
15.Q: What is the difference between Resistance and Impedance?
A: * Resistance ($\Omega$): Opposition to Direct Current (DC); affected by
cable length.
o Impedance ($Z$): Opposition to Alternating Current (AC);
affected by frequency, induction, and capacitance.
16.Q: What is Peak Amplitude?
A: The absolute value of a signal's greatest magnitude relative to the energy it
carries.
17.Q: How are Frequency and Wavelength defined?
A: * Frequency: The number of complete cycles per second.
