Communication Systems in Electrical Engineering
  • 1. Communication systems in electrical engineering involve the transmission, reception, processing, and storage of information through electrical signals. These systems play a crucial role in facilitating the exchange of data and messages between different devices and users. Key components of communication systems include transmitters, receivers, channels, and protocols. The design and analysis of communication systems aim to ensure efficient and reliable transfer of information while considering factors such as bandwidth, noise, and data rate. Engineers in this field work on developing technologies such as wireless communication, optical networks, and satellite communication to enhance connectivity and enable communication across various platforms and distances.

    What is the Shannon capacity formula in communication systems?
A) C = B * SNR
B) C = log2(1 + SNR)
C) C = B / log2(1 + SNR)
D) C = B * log2(1 + SNR)
  • 2. What is the role of a repeater in communication systems?
A) To modulate signals
B) To amplify and retransmit signals
C) To filter out noise from signals
D) To digitize analog signals
  • 3. What is the function of a demodulator in a communication system?
A) To transmit the signal
B) To extract the original message signal from the modulated signal
C) To attenuate the signal
D) To encode the message signal
  • 4. What does BER stand for in communication systems?
A) Bandwidth Error Rate
B) Baseband Error Rate
C) Binary Encoding Rate
D) Bit Error Rate
  • 5. What is the Nyquist theorem used for in communication systems?
A) To determine the maximum data rate over a channel
B) To modulate signals
C) To equalize signals
D) To amplify signals
  • 6. What is the purpose of error detection codes in communication systems?
A) To compress data
B) To detect and correct errors in transmitted data
C) To encrypt data
D) To increase data transmission speed
  • 7. In communication systems, what does ADC stand for?
A) Amplitude Domain Converter
B) Automatic Data Communication
C) Analog Digital Channel
D) Analog-to-Digital Converter
  • 8. What is meant by the term 'duplexing' in communication systems?
A) Simultaneous transmission and reception on a common channel
B) Analog to digital signal conversion
C) Frequency modulation of signals
D) Error correction in data transmission
  • 9. What is the purpose of a splitter in distribution systems?
A) To filter out noise
B) To amplify signals
C) To divide a signal into multiple paths
D) To combine signals into a single path
  • 10. What is the primary function of a router in communication networks?
A) To convert analog signals to digital signals
B) To route data packets between different networks
C) To amplify signals
D) To modulate signals
  • 11. What is the purpose of a transceiver in communication systems?
A) To amplify signals
B) To both transmit and receive signals
C) To filter out noise
D) To encode signals
  • 12. What does the acronym CDMA stand for in communication systems?
A) Centralized Data Modulation Algorithm
B) Channel Division Multiplexing Array
C) Coordinated Domain Modulation Approach
D) Code Division Multiple Access
  • 13. Which of the following is true about the bandwidth of a signal in communication systems?
A) It is the amplitude of the signal
B) It is the range of frequencies occupied by the signal
C) It is the rate of signal transmission
D) It is the time duration of the signal
  • 14. What is the role of a network switch in communication networks?
A) To modulate signals
B) To convert digital signals to analog signals
C) To connect devices within a local area network and forward data packets
D) To encrypt data
  • 15. What does the term 'echo cancellation' refer to in communication systems?
A) Shifting signals in time
B) Creating echo effects on signals
C) Removing echo from transmitted signals
D) Amplifying echo in signals
  • 16. Which protocol is commonly used for email communication over the Internet?
A) SMTP (Simple Mail Transfer Protocol)
B) HTTP (Hypertext Transfer Protocol)
C) TCP (Transmission Control Protocol)
D) FTP (File Transfer Protocol)
  • 17. What is a multiplexer used for in communication systems?
A) To detect errors in transmitted data
B) To combine multiple input signals into a single output
C) To convert analog signals to digital signals
D) To decompress audio signals
  • 18. In digital communication, what does 'SNR' stand for?
A) Signal Neutralization Rate
B) Symbol Noise Reduction
C) System Network Requirement
D) Signal-to-Noise Ratio
  • 19. Which of the following is an example of a digital communication protocol?
A) Satellite Communication
B) FM Radio
C) Analog TV
D) TCP/IP
  • 20. Which of the following is a common frequency band used for Wi-Fi communication?
A) 10 kHz
B) 2.4 GHz
C) 1000 GHz
D) 500 MHz
  • 21. Which of the following components is typically used for signal amplification in a communication system?
A) Amplifier
B) Transmitter
C) Modem
D) Antenna
  • 22. What does the acronym 'AM' stand for in communication systems?
A) Analog Multiplexing
B) Audio Modulation
C) Amplitude Modulation
D) Amplification Method
  • 23. Which of the following is a digital modulation technique?
A) Continuous Wave Modulation
B) Quadrature Amplitude Modulation (QAM)
C) Frequency Hopping Spread Spectrum
D) Phase Shift Keying (PSK)
  • 24. Which type of modulation is used in Bluetooth communication technology?
A) Frequency Hopping Spread Spectrum (FHSS)
B) Phase Modulation
C) Amplitude Modulation
D) Pulse Width Modulation
  • 25. Which of the following is a common method for achieving error detection in digital communication?
A) Pulse Code Modulation (PCM)
B) Cyclic Redundancy Check (CRC)
C) Amplitude Modulation (AM)
D) Frequency Division Multiplexing (FDM)
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