Wireless Communications MCQs

1. What does WLAN stand for? A. Wireless Local Area Network B. Wired Local Area Network C. Wireless Long Area Network D. Wired Long Area Network Answer: A 2. Which of the following is not a wireless communication standard? A. Bluetooth B. Ethernet C. Wi-Fi D. LTE Answer: B 3. In cellular networks, what does “LTE” stand for? A. Long-Term Evolution B. Localized Telephone Exchange C. Low Transmission Efficiency D. Long-Term Encoding Answer: A 4. Which modulation technique is commonly used in Wi-Fi (802.11) networks? A. Frequency Modulation (FM) B. Phase Modulation (PM) C. Orthogonal Frequency-Division Multiplexing (OFDM) D. Amplitude Modulation (AM) Answer: C 5. Which frequency band is commonly used for Bluetooth communication? A. 2.4 GHz B. 5 GHz C. 1 GHz D. 10 GHz Answer: A 6. What is the maximum data transfer rate of Bluetooth 5.0? A. 1 Mbps B. 2 Mbps C. 5 Mbps D. 10 Mbps Answer: B 7. Which organization oversees the development of Wi-Fi standards? A. IEEE B. ISO C. IETF D. ITU Answer: A 8. Which of the following is not a type of antenna commonly used in wireless communications? A. Dipole antenna B. Yagi-Uda antenna C. Laser antenna D. Parabolic antenna Answer: C 9. Which of the following is a key advantage of MIMO (Multiple Input Multiple Output) technology? A. Higher data rates B. Longer range C. Lower power consumption D. Better resistance to interference Answer: A 10. Which technology allows mobile devices to seamlessly switch between different cellular networks? A. Roaming B. Multiplexing C. Encryption D. Modulation Answer: A 11. Which of the following is not a component of a typical cellular network? A. Base station B. Mobile switching center C. Router D. Subscriber identity module (SIM) Answer: C 12. Which technology is used in NFC (Near Field Communication)? A. RFID B. Wi-Fi C. Bluetooth D. LTE Answer: A 13. Which generation of mobile networks introduced the concept of data services alongside voice services? A. 1G B. 2G C. 3G D. 4G Answer: C 14. Which of the following is a disadvantage of using satellite communication for wireless data transmission? A. Wide coverage area B. Low latency C. High initial setup cost D. Limited bandwidth Answer: C 15. What is the primary function of a repeater in wireless communication? A. Amplify signals to extend coverage B. Authenticate users C. Encrypt data transmissions D. Manage network traffic Answer: A 16. Which of the following is not a common interference source in wireless communications? A. Microwave ovens B. Bluetooth devices C. Fiber-optic cables D. Cordless phones Answer: C 17. Which modulation technique is typically used in 4G LTE networks? A. CDMA B. TDMA C. OFDM D. GSM Answer: C 18. Which of the following is a characteristic of a mesh network? A. Centralized control B. Single point of failure C. High scalability D. Low initial cost Answer: C 19. What is the purpose of handover in cellular networks? A. Billing management B. Signal encryption C. Seamless call transfer D. Error correction Answer: C 20. Which technology is primarily used for communication between devices in the Internet of Things (IoT)? A. Zigbee B. Ethernet C. Token Ring D. ISDN Answer: A 21. Which of the following is a characteristic of a peer-to-peer network? A. Centralized server B. Decentralized architecture C. High latency D. Low security Answer: B 22. Which type of antenna is often used in satellite communication? A. Yagi-Uda antenna B. Parabolic antenna C. Loop antenna D. Whip antenna Answer: B 23. Which technology is used for contactless payments like Apple Pay and Google Wallet? A. NFC B. RFID C. Bluetooth D. Wi-Fi Answer: A 24. What does the acronym RFID stand for? A. Radio Frequency Identification B. Real-time Frequency Integration C. Rapid Frequency Induction D. Remote Frequency Indicator Answer: A 25. Which frequency band is typically used for 5G networks? A. Below 1 GHz B. 2.4 GHz C. Above 6 GHz D. 3 GHz Answer: C 26. Which technology allows multiple users to share the same communication channel by dividing the channel into time slots? A. TDMA B. CDMA C. OFDM D. GSM Answer: A 27. Which of the following is a benefit of beamforming in wireless communication? A. Reduced interference B. Increased latency C. Lower bandwidth utilization D. Decreased coverage area Answer: A 28. Which type of antenna is commonly used in WiMAX (Worldwide Interoperability for Microwave Access)? A. Parabolic antenna B. Loop antenna C. Helical antenna D. Dipole antenna Answer: A 29. Which organization manages the allocation of radio frequencies worldwide? A. ITU B. IEEE C. IETF D. ISO Answer: A 30. Which technology allows a device to maintain a connection as it moves from one access point to another within the same network? A. Roaming B. Multiplexing C. Encryption D. Modulation Answer: A 31. Which of the following is a characteristic of a star network topology? A. Each device is connected to every other device. B. It is decentralized with no central controller. C. Failure of one device does not affect others. D. It forms a closed loop of interconnected devices. Answer: C 32. Which technology is used for short-range communication between devices in a wireless personal area network (WPAN)? A. Bluetooth B. Wi-Fi C. LTE D. Satellite communication Answer: A 33. Which technology allows a device to maintain connectivity across different wireless networks, ensuring seamless communication? A. Handover B. Roaming C. Multiplexing D. Modulation Answer: B 34. Which of the following is a characteristic of a bus network topology? A. High fault tolerance B. Centralized control C. Limited scalability D. Each device is connected to a single cable. Answer: D 35. Which of the following is a key feature of Wi-Fi 6 (802.11ax)? A. Lower data transfer rates than Wi-Fi 5 B. Improved performance in congested environments C. Limited compatibility with older Wi-Fi standards D. Support for fewer connected devices Answer: B 36. What is the purpose of a spectrum analyzer in wireless communications? A. To encrypt data transmissions B. To analyze and visualize frequency spectrum C. To amplify weak signals D. To manage network traffic Answer: B 37. Which technology is used to extend the coverage of a cellular network? A. Repeater B. Modem C. Router D. Gateway Answer: A 38. Which of the following is a characteristic of a point-to-point network topology? A. Highly scalable B. Single point of failure C. Each device is connected to every other device. D. Decentralized architecture Answer: B 39. What does the acronym GPS stand for? A. Global Pointing System B. Geographic Positioning System C. General Positioning Satellite D. Global Positioning Satellite Answer: D 40. Which technology is used to manage simultaneous transmissions in a wireless network to minimize interference? A. FDMA B. CDMA C. TDMA D. SDMA Answer: C 41. What is the typical range of a Bluetooth Class 1 device under ideal conditions? A. Up to 10 meters B. Up to 100 meters C. Up to 1 kilometer D. Up to 10 kilometers Answer: B 42. Which of the following is a characteristic of a ring network topology? A. Each device is connected to every other device. B. It is decentralized with no central controller. C. Failure of one device does not affect others. D. It forms a closed loop of interconnected devices. Answer: D 43. What is the primary advantage of using a full-duplex communication system? A. Lower latency B. Higher data transfer rates C. Reduced power consumption D. Simpler infrastructure Answer: B 44. Which of the following is a characteristic of a tree network topology? A. Highly scalable B. Limited fault tolerance C. Decentralized architecture D. Each device is connected to a single cable. Answer: A 45. Which modulation technique is typically used in RFID (Radio Frequency Identification) systems? A. ASK (Amplitude Shift Keying) B. QAM (Quadrature Amplitude Modulation) C. PSK (Phase Shift Keying) D. FSK (Frequency Shift Keying) Answer: A 46. Which technology allows multiple transmitters to send signals simultaneously over the same frequency band by using different codes? A. TDMA B. CDMA C. FDMA D. SDMA Answer: B 47. What is the primary function of a gateway in a wireless network? A. Manage network security B. Convert data between different protocols C. Amplify weak signals D. Authenticate users Answer: B 48. Which organization defines the standards for Bluetooth technology? A. IEEE B. ITU C. IETF D. Bluetooth Special Interest Group (SIG) Answer: D 49. What is the primary function of a router in a wireless network? A. Amplify signals B. Convert analog signals to digital signals C. Manage traffic between different networks D. Authenticate users Answer: C 50. Which technology is used to create a secure connection between a mobile device and a network, often used for remote access? A. VPN (Virtual Private Network) B. LAN (Local Area Network) C. WAN (Wide Area Network) D. MAN (Metropolitan Area Network) Answer: A

More MCQS on Electronics MCQs

1. Physical Chemistry MCQs
2. General Chemistry MCQs
3. Chemistry MCQs
4. Modern Physics MCQs
5. Waves and Optics MCQs
6. Electromagnetism MCQs
7. Mechanics MCQs
8. Physics MCQs
9. Optoelectronics MCQs
10. Wireless Communications MCQs
11. Network Security MCQs
12. Artificial Intelligence and Machine Learning MCQs
13. Internet of Things (IoT) MCQs
14. Robotics MCQs
15. Software Engineering MCQs
16. Embedded Systems Programming MCQs
17. Computer Architecture MCQs
18. Data Structures and Algorithms MCQs
19. Introduction to Programming MCQs
20. Renewable Energy Systems MCQs
21. Power Systems MCQs
22. Biomedical Electronics MCQs
23. Telecommunications Engineering MCQs
24. Photonics MCQs
25. Nanotechnology MCQs
26. Semiconductor Devices MCQs
27. RF and Microwave Engineering MCQs
28. Digital Signal Processing (DSP) MCQs
29. VLSI Design (Very-Large-Scale Integration) MCQs
30. Embedded Systems MCQs
31. Power Electronics MCQs
32. Control Systems MCQs
33. Analog and Digital Communication Systems MCQs
34. Microprocessors and Microcontrollers MCQs
35. Electromagnetic Fields and Waves MCQs
36. Signals and Systems MCQs
37. Digital Logic Design MCQs
38. Electronics MCQs
39. Electronics MCQs