Communication Basics MCQs January 8, 2026November 20, 2024 by u930973931_answers 20 min Score: 0 Attempted: 0/20 Subscribe 1. What is the primary purpose of a communication system? (A) To transfer information from one point to another (B) To amplify signals (C) To convert analog signals to digital signals (D) To suppress noise 2. Which of the following is NOT a basic element of a communication system? (A) Filter (B) Channel (C) Receiver (D) Transmitter 3. The medium through which signals travel in a communication system is called: (A) Receiver (B) Transmitter (C) Channel (D) Antenna 4. Which of the following is an example of wireless communication? (A) Satellite communication (B) Telephone using landlines (C) Fiber optic communication (D) Ethernet cable transmission 5. In simplex communication, data flows: (A) In both directions simultaneously (B) In one direction only (C) In both directions, but one at a time (D) Alternating between two channels 6. Which of the following is an example of full-duplex communication? (A) Radio broadcasting (B) Walkie-talkie (C) Television broadcasting (D) Telephone conversation 7. A signal is defined as: (A) Random noise added to the system (B) A circuit element used for amplification (C) A function conveying information (D) None of the above 8. Which of the following reduces the quality of a communication signal? (A) Amplification (B) Modulation (C) Noise (D) Synchronization 9. 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) Gain 10. What is modulation? (A) Amplification of a weak signal (B) Converting digital signals to analog (C) Removing noise from a signal (D) Encoding information onto a carrier wave 11. Which of the following is NOT a type of modulation? (A) Wavelength Modulation (WM) (B) Frequency Modulation (FM) (C) Amplitude Modulation (AM) (D) Phase Modulation (PM) 12. 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 detection 13. 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 systems 14. Which of the following is NOT a guided transmission medium? (A) Coaxial cable (B) Air (C) Fiber optics (D) Twisted pair cable 15. What is the primary advantage of optical fiber communication? (A) High noise immunity (B) Large bandwidth capacity (C) Simple installation (D) Low cost 16. Which type of wave is used in satellite communication? (A) Sound wave (B) Radio wave (C) Light wave (D) Seismic wave 17. Bluetooth technology operates in the: (A) Microwave frequency range (B) Infrared frequency range (C) Ultraviolet frequency range (D) Radio frequency range 18. Which of the following is used for short-range communication? (A) Wi-Fi (B) Satellite communication (C) Cellular networks (D) Optical fiber 19. Which of the following is an example of a broadcast communication system? (A) Fiber optic communication (B) Telephone (C) Television (D) Email 20. Which standard is used for cellular communication? (A) GSM (Global System for Mobile Communications) (B) Ethernet (C) TCP/IP (D) IEEE 802.11