Telecommunications Engineering MCQs January 8, 2026July 11, 2024 by u930973931_answers 50 min Score: 0 Attempted: 0/50 Subscribe 1. What does the term “LTE” stand for? (A) Lossless Transmission Engineering (B) Light Transmission Efficiency (C) Low-Temperature Emission (D) Long-Term Evolution 2. Which modulation technique is commonly used in Wi-Fi (802.11) networks? (A) ASK (Amplitude Shift Keying) (B) QAM (Quadrature Amplitude Modulation) (C) PSK (Phase Shift Keying) (D) FSK (Frequency Shift Keying) 3. Which of the following is not a characteristic of a satellite communication system? (A) High latency (B) Wide coverage area (C) Low reliability (D) Line-of-sight propagation 4. What is the purpose of a modem in telecommunications? (A) To modulate signals for transmission (B) All of the above (C) To convert analog signals to digital signals and vice versa (D) To demodulate signals upon reception 5. Which protocol is used for email transmission over the Internet? (A) FTP (File Transfer Protocol) (B) HTTP (Hypertext Transfer Protocol) (C) SMTP (Simple Mail Transfer Protocol) (D) TCP (Transmission Control Protocol) 6. What is the primary function of a router in a computer network? (A) To amplify signals for long-distance transmission (B) To connect multiple networks together (C) To convert digital signals to analog signals (D) To encrypt data for secure transmission 7. Which of the following is a disadvantage of optical fiber communication? (A) Limited bandwidth (B) Susceptibility to electromagnetic interference (C) High installation cost (D) Short transmission range 8. What is the purpose of error detection and correction in data communication? (A) To prevent unauthorized access to data (B) To compress data for efficient storage (C) To ensure data integrity and reliability (D) To convert analog signals to digital signals 9. In telecommunications, what does the term “MAC” refer to? (A) Modulation Amplitude Control (B) Maximum Attenuation Capacity (C) Multiplexed Analog Circuit (D) Medium Access Control 10. Which frequency band is commonly used for Bluetooth communication? (A) 1.8 GHz (B) 5 GHz (C) 900 MHz (D) 2.4 GHz 11. Which networking device operates at the Data Link layer of the OSI model? (A) Router (B) Hub (C) Switch (D) Bridge 12. What does the term “VoIP” stand for? (A) Variable Output Interconnect Protocol (B) Virtual Optical Internet Provider (C) Voice over Internet Protocol (D) Voice-on Integrated Pathway 13. Which modulation technique is commonly used in 4G LTE networks? (A) QPSK (Quadrature Phase Shift Keying) (B) OFDM (Orthogonal Frequency Division Multiplexing) (C) BPSK (Binary Phase Shift Keying) (D) FM (Frequency Modulation) 14. What is the purpose of a firewall in a computer network? (A) To convert digital signals to analog signals (B) To amplify weak signals for long-distance transmission (C) To filter incoming and outgoing network traffic (D) To encrypt data for secure transmission 15. Which of the following is a characteristic of a WAN (Wide Area Network)? (A) Limited geographic area (B) Typically owned by a single organization (C) Uses public infrastructure to connect geographically dispersed locations (D) High data transfer rate 16. Which layer of the OSI model is responsible for reliable end-to-end communication? (A) Transport layer (B) Network layer (C) Data Link layer (D) Physical layer 17. What is the primary function of DHCP (Dynamic Host Configuration Protocol)? (A) To convert digital signals to analog signals (B) To encrypt data for secure transmission (C) To assign IP addresses to devices on a network (D) To filter incoming and outgoing network traffic 18. Which type of transmission medium is most susceptible to electromagnetic interference? (A) Wireless transmission (B) Coaxial cable (C) Optical fiber (D) Twisted pair cable 19. What is the significance of the Nyquist theorem in telecommunications? (A) It specifies the modulation technique for fiber optic networks (B) It determines the minimum power required for transmission (C) It regulates the frequency allocation for radio communication (D) It defines the maximum data rate of a channel 20. Which of the following is a characteristic of TCP (Transmission Control Protocol)? (A) Connectionless protocol (B) Unreliable data delivery (C) Provides error checking and reliable delivery of data (D) Used primarily for real-time multimedia streaming 21. What does the term “QoS” refer to in networking? (A) Quantitative Output Signal (B) Quiet Operating System (C) Quality of Service (D) Query of Servers 22. Which of the following is a key advantage of digital transmission over analog transmission? (A) Lower bandwidth requirements (B) Higher security (C) Easier integration with existing infrastructure (D) Reduced transmission range 23. Which network topology provides the highest level of redundancy? (A) Bus (B) Mesh (C) Star (D) Ring 24. In which layer of the OSI model do TCP/IP protocols operate? (A) Application layer (B) Data Link layer (C) Network layer (D) Transport layer 25. Which of the following is not a type of multiplexing technique? (A) PAM (Pulse Amplitude Modulation) (B) TDM (Time Division Multiplexing) (C) FDM (Frequency Division Multiplexing) (D) CDM (Code Division Multiplexing) 26. What is the role of a repeater in a communication network? (A) To connect different types of networks together (B) To encrypt data for secure transmission (C) To filter unwanted traffic (D) To regenerate and amplify signals 27. Which modulation technique is commonly used in AM radio broadcasting? (A) FM (Frequency Modulation) (B) AM (Amplitude Modulation) (C) PM (Phase Modulation) (D) QAM (Quadrature Amplitude Modulation) 28. What is the function of a transceiver in a wireless communication system? (A) To convert analog signals to digital signals (B) To transmit and receive signals (C) To convert digital signals to analog signals (D) To encrypt data for secure transmission 29. Which of the following is not a component of a cellular network? (A) Base station (B) Mobile station (C) Mobile switching center (D) Router 30. Which protocol is used for secure communication over a computer network? (A) SMTP (Simple Mail Transfer Protocol) (B) FTP (File Transfer Protocol) (C) SNMP (Simple Network Management Protocol) (D) HTTPS (Hypertext Transfer Protocol Secure) 31. What is the primary function of SONET (Synchronous Optical Networking)? (A) To encrypt digital signals (B) To regulate satellite communication (C) To transmit data over optical fiber networks (D) To amplify weak signals 32. Which of the following is a characteristic of a full-duplex communication system? (A) Data flows in both directions simultaneously (B) Data can only flow in one direction at a time (C) Data rate is limited to half of the channel capacity (D) Data is transmitted using multiple frequencies 33. What is the purpose of CDMA (Code Division Multiple Access) in mobile communication? (A) To encrypt voice calls (B) To allocate unique codes to different users (C) To improve signal quality (D) To compress data for efficient transmission 34. Which of the following is an advantage of using MIMO (Multiple Input Multiple Output) technology? (A) Reduced complexity of devices (B) Lower power consumption (C) Narrower coverage area (D) Higher data transfer rates 35. Which organization develops and maintains the GSM (Global System for Mobile Communications) standard? (A) IEEE (Institute of Electrical and Electronics Engineers) (B) ITU (International Telecommunication Union) (C) ETSI (European Telecommunications Standards Institute) (D) ANSI (American National Standards Institute) 36. Which of the following is a characteristic of a broadcast network topology? (A) Highly reliable (B) Difficult to troubleshoot (C) Requires central control (D) Low cost of implementation 37. Which frequency band is used for 5G cellular networks? (A) 2.4 GHz (B) 3.5 GHz (C) 5 GHz (D) Millimeter wave bands 38. What is the function of a multiplexer in telecommunications? (A) To encrypt data for secure transmission (B) To amplify signals for long-distance transmission (C) To convert analog signals to digital signals (D) To separate multiple signals for transmission over a single channel 39. Which of the following is a characteristic of a ring network topology? (A) Centralized control (B) Requires minimal cabling (C) High reliability (D) Difficult to expand 40. What is the purpose of FEC (Forward Error Correction) in data communication? (A) To encrypt data for secure transmission (B) To compress data for efficient storage (C) To modulate signals for transmission (D) To correct errors in transmitted data without the need for retransmission 41. Which of the following is not a characteristic of a digital signal? (A) More secure than analog signals (B) Can be regenerated without loss of quality (C) Can carry more information per unit time (D) Can be easily affected by noise 42. Which protocol is used for file sharing over a network? (A) FTP (File Transfer Protocol) (B) SMTP (Simple Mail Transfer Protocol) (C) HTTP (Hypertext Transfer Protocol) (D) SNMP (Simple Network Management Protocol) 43. What is the function of an access point in a Wi-Fi network? (A) To connect different types of networks together (B) To provide wireless connectivity to devices (C) To amplify signals for long-distance transmission (D) To filter unwanted traffic 44. Which of the following is a characteristic of a point-to-point network topology? (A) Scalable and easy to expand (B) High fault tolerance (C) Requires a central controller (D) Low initial setup cost 45. What does the term “DSL” stand for in telecommunications? (A) Digital Subscriber Line (B) Dual Subscriber Line (C) Digital Signal Link (D) Data System Link 46. Which network protocol is used for remotely accessing and managing network devices? (A) HTTP (Hypertext Transfer Protocol) (B) SMTP (Simple Mail Transfer Protocol) (C) FTP (File Transfer Protocol) (D) SNMP (Simple Network Management Protocol) 47. Which of the following is a characteristic of a client-server network architecture? (A) Each node can communicate directly with any other node (B) High fault tolerance (C) Requires minimal cabling (D) Centralized control over network resources 48. What is the function of a gateway in a computer network? (A) To convert digital signals to analog signals (B) To filter incoming and outgoing network traffic (C) To provide wireless connectivity to devices (D) To connect different types of networks together 49. Which of the following is a characteristic of a bus network topology? (A) Highly secure (B) Provides high fault tolerance (C) Requires termination at each end of the bus (D) Difficult to expand 50. What is the purpose of ARP (Address Resolution Protocol) in TCP/IP networking? (A) To convert IP addresses to MAC addresses (B) To establish a secure connection between two devices (C) To encrypt data for secure transmission (D) To regulate traffic flow on a network