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

Wireless Communications MCQs

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