- What is the primary purpose of a communication system?
A. To amplify signals
B. To transfer information from one point to another
C. To convert analog signals to digital signals
D. To suppress noiseAnswer: B
- Which of the following is NOT a basic element of a communication system?
A. Transmitter
B. Channel
C. Receiver
D. FilterAnswer: D
- The medium through which signals travel in a communication system is called:
A. Receiver
B. Transmitter
C. Channel
D. AntennaAnswer: C
- Which of the following is an example of wireless communication?
A. Telephone using landlines
B. Satellite communication
C. Fiber optic communication
D. Ethernet cable transmissionAnswer: B
- In simplex communication, data flows:
A. In both directions simultaneously
B. In both directions, but one at a time
C. In one direction only
D. Alternating between two channelsAnswer: C
- Which of the following is an example of full-duplex communication?
A. Radio broadcasting
B. Walkie-talkie
C. Telephone conversation
D. Television broadcastingAnswer: C
- A signal is defined as:
A. Random noise added to the system
B. A function conveying information
C. A circuit element used for amplification
D. None of the aboveAnswer: B
- Which of the following reduces the quality of a communication signal?
A. Amplification
B. Noise
C. Modulation
D. SynchronizationAnswer: B
- The ratio of the signal power to the noise power is called:
A. Signal-to-Noise Ratio (SNR)
B. Noise Power Ratio (NPR)
C. Modulation Index
D. GainAnswer: A
- What is modulation?
A. Amplification of a weak signal
B. Encoding information onto a carrier wave
C. Removing noise from a signal
D. Converting digital signals to analogAnswer: B
- Which of the following is NOT a type of modulation?
A. Amplitude Modulation (AM)
B. Frequency Modulation (FM)
C. Wavelength Modulation (WM)
D. Phase Modulation (PM)Answer: C
- Multiplexing allows:
A. Increasing the power of a signal
B. Multiple signals to share a single channel
C. Conversion of analog signals to digital
D. Signal detectionAnswer: B
- Which of the following is used for time-division multiplexing (TDM)?
A. Analog signals
B. Digital signals
C. Both analog and digital signals
D. Noise suppression systemsAnswer: B
- Which of the following is NOT a guided transmission medium?
A. Coaxial cable
B. Fiber optics
C. Air
D. Twisted pair cableAnswer: C
- What is the primary advantage of optical fiber communication?
A. High noise immunity
B. Low cost
C. Simple installation
D. Large bandwidth capacityAnswer: D
- Which type of wave is used in satellite communication?
A. Sound wave
B. Radio wave
C. Light wave
D. Seismic waveAnswer: B
- Bluetooth technology operates in the:
A. Microwave frequency range
B. Infrared frequency range
C. Ultraviolet frequency range
D. Radio frequency rangeAnswer: D
- Which of the following is used for short-range communication?
A. Satellite communication
B. Wi-Fi
C. Cellular networks
D. Optical fiberAnswer: B
- Which of the following is an example of a broadcast communication system?
A. Television
B. Telephone
C. Fiber optic communication
D. EmailAnswer: A
- Which standard is used for cellular communication?
A. Ethernet
B. GSM (Global System for Mobile Communications)
C. TCP/IP
D. IEEE 802.11Answer: B