AP ECET ELECTRONICS AND COMMUNICATION ENGINEERING (ECE) Multiple Choice Questions (MCQs)
AP ECET Electronics and Communication Engineering (ECE) - MCQs
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Which of the following is the main function of an antenna in a communication system?
- A) Amplifying the signal
- B) Radiating electromagnetic waves
- C) Filtering the signal
- D) Encoding the signal
Answer: B) Radiating electromagnetic waves
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What is the bandwidth of a communication system?
- A) The maximum frequency range the system can handle
- B) The minimum frequency range the system can handle
- C) The power of the signal
- D) The modulation type used
Answer: A) The maximum frequency range the system can handle
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In which mode does a radar system primarily operate?
- A) CW mode
- B) Pulsed mode
- C) Both CW and Pulsed mode
- D) Amplitude modulation mode
Answer: B) Pulsed mode
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What does the term 'Directivity' of an antenna refer to?
- A) The ability of the antenna to focus energy in a specific direction
- B) The physical size of the antenna
- C) The energy loss in the antenna
- D) The angle at which the signal is received
Answer: A) The ability of the antenna to focus energy in a specific direction
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Which of the following is a property of a satellite communication system?
- A) Uses a terrestrial medium for transmission
- B) Low-frequency bands are used for communication
- C) Signals are transmitted to and received from space-based satellites
- D) It does not require ground stations
Answer: C) Signals are transmitted to and received from space-based satellites
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In fiber-optic communication, which of the following is used to transmit data?
- A) Electrical signals
- B) Optical signals
- C) Microwave signals
- D) Radio waves
Answer: B) Optical signals
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Which of the following protocols is used for secure data transmission over the Internet?
- A) FTP
- B) HTTP
- C) SSL/TLS
- D) POP3
Answer: C) SSL/TLS
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In the GSM system, what does the abbreviation 'GSM' stand for?
- A) Global System for Mobile Communication
- B) General Standard for Mobile Communication
- C) Global Standard for Mobile Communication
- D) General System for Mobile Communication
Answer: A) Global System for Mobile Communication
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Which type of modulation is used in Digital Communication systems?
- A) Amplitude Modulation (AM)
- B) Frequency Modulation (FM)
- C) Phase Modulation (PM)
- D) Quadrature Amplitude Modulation (QAM)
Answer: D) Quadrature Amplitude Modulation (QAM)
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Which device is used to convert a digital signal to an analog signal?
- A) A/D Converter
- B) D/A Converter
- C) Modulator
- D) Demodulator
Answer: B) D/A Converter
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In a fiber-optic cable, which component is responsible for the total internal reflection?
- A) Cladding
- B) Core
- C) Jacket
- D) Connector
Answer: A) Cladding
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Which of the following is a function of a 'multiplexer' in communication systems?
- A) Combining multiple signals into one
- B) Separating a single signal into multiple signals
- C) Amplifying a signal
- D) Filtering unwanted signals
Answer: A) Combining multiple signals into one
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Which of the following types of radar systems is used to detect the distance of objects?
- A) Continuous Wave Radar
- B) Pulse Radar
- C) Doppler Radar
- D) FM Radar
Answer: B) Pulse Radar
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In a communication system, which parameter determines the maximum distance over which a signal can be transmitted without significant loss?
- A) Bandwidth
- B) Gain
- C) Frequency
- D) Power
Answer: B) Gain
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Which of the following is a characteristic of satellite communication systems?
- A) High bandwidth
- B) Long-distance transmission
- C) Requires less infrastructure
- D) Low-frequency transmission
Answer: B) Long-distance transmission
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