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