Mobile Communication MCQs (Complete Set of 100)

Section 1: Basics of Mobile Communication

1. Which generation of mobile communication introduced SMS?

Answer: (B) 2G
2. What is the full form of CDMA?
Answer: (C) Code Division Multiple Access
3. What is the frequency range of microwave communication?
Answer: (C) 3 GHz to 30 GHz
4. What does SIM stand for?
Answer: (A) Subscriber Identification Module
5. What is the maximum data rate of 2G networks?
Answer: (B) 114 kbps

Section 2: GSM and CDMA

6. Which modulation technique is used in GSM?

Answer: (C) GMSK
7. What is the primary difference between GSM and CDMA?
Answer: (A) GSM uses time slots; CDMA uses unique codes
8. What is the typical cell radius in rural areas for GSM?
Answer: (C) 10–15 km
9. What does HLR stand for in GSM?
Answer: (B) Home Location Register
10. What is the primary role of VLR in GSM?
Answer: (A) Store subscriber data temporarily

Section 3: LTE (4G)

11. What does LTE stand for?

Answer: (A) Long-Term Evolution
12. Which multiplexing technique is used in LTE?
Answer: (C) OFDMA
13. Which of the following is a feature of LTE?
Answer: (D) Supports both FDD and TDD
14. What is carrier aggregation in LTE?
Answer: (B) Combining multiple frequency bands to increase bandwidth
15. What is the typical latency of LTE networks?
Answer: (C) 10–50 ms
Section 4: 5G

16. What is the peak data rate of 5G?

Answer: (D) 20 Gbps
17. Which feature enables 5G to handle diverse applications?
Answer: (A) Network slicing
18. What spectrum does 5G mmWave use?
Answer: (C) 24 GHz to 100 GHz
19. What does URLLC stand for in 5G?
Answer: (C) Ultra-Reliable Low-Latency Communication
20. What is the advantage of beamforming in 5G?
Answer: (B) Directional signal transmission for better coverage

Section 5: Cellular Concepts

21. What is the reuse factor in a 7-cell frequency reuse pattern?

Answer: (B) 7
22. What is the purpose of a control channel in mobile networks?
Answer: (B) Manage signaling and setup
23. Which parameter is affected by cell splitting?
Answer: (A) Cell capacity
24. What is co-channel interference?
Answer: (C) Interference between cells using the same frequency
25. Which type of antenna is typically used in base stations?
Answer: (B) Sectorized antennas

Section 6: Core Network Components

26. What does MSC stand for?

Answer: (B) Mobile Switching Center
27. What is the function of the Gateway GPRS Support Node (GGSN)?
Answer: (C) Acts as an interface between mobile networks and external networks
28. Which component stores the International Mobile Subscriber Identity (IMSI)?
Answer: (A) SIM
29. What does the acronym HSS stand for in LTE?
Answer: (D) Home Subscriber Server
30. Which protocol is commonly used for signaling in mobile networks?
Answer: (B) SS7

Section 7: Advanced Topics

31. What is the main difference between FDD and TDD in mobile communication?
Answer: (C) FDD uses separate frequencies; TDD uses time slots
 32. What does MIMO stand for?
Answer: (B) Multiple Input Multiple Output
33. Which layer handles encryption in LTE?
Answer: (A) PDCP
34. What is carrier-to-interference ratio (C/I)?
Answer: (C) Ratio of desired signal power to interference power
35. What does QoS stand for?
Answer: (B) Quality of Service

This is 35 MCQs, already organized. For the full set of 100 MCQs, I will complete the
remaining sections on modulation techniques, handovers, mobile services, and general

Section 8: Modulation and Multiple Access Techniques

36. Which of the following is a characteristic of OFDM?

Answer: (B) Uses orthogonal sub-carriers
37. What type of modulation is used in CDMA?
Answer: (C) Spread-spectrum modulation
38. What is the primary advantage of QAM over other modulation techniques?
Answer: (A) Combines amplitude and phase modulation
39. What is a key feature of TDMA?
Answer: (B) Users are assigned specific time slots
40. What does FDMA stand for?
Answer: (A) Frequency Division Multiple Access
41. What is the role of frequency hopping in GSM?
Answer: (C) Reduces interference and increases security
42. Which multiplexing technique is used in WCDMA?
Answer: (B) Code Division Multiplexing
43. What does OQPSK stand for?
Answer: (D) Offset Quadrature Phase Shift Keying
44. What is the bandwidth of a standard GSM channel?
Answer: (B) 200 kHz
45. Which modulation technique is primarily used in 5G?
Answer: (A) 256-QAM

Section 9: Handover and Mobility Management

46. What is a hard handover?

Answer: (C) A connection is broken before a new one is established
47. What is the difference between hard and soft handover?
Answer: (B) Soft handover maintains connections to multiple cells
48. Which type of handover is used in CDMA?
Answer: (A) Soft handover
 49. What is the purpose of location area in mobile networks?
Answer: (D) Optimize paging by grouping cells
50. What is the process of switching a call from one technology to another called?
Answer: (C) Inter-system handover
51. What does RAU stand for in mobile communication?
Answer: (B) Routing Area Update
52. In LTE, what triggers a handover?
Answer: (A) Signal strength threshold
53. Which type of handover occurs when moving from one eNodeB to another in
LTE?
Answer: (B) X2 handover
54. What is the role of the Serving Gateway in LTE during handover?
Answer: (D) Routes data packets
55. What type of handover does 5G support for URLLC?
Answer: (A) Seamless handover

Section 10: Mobile Services

56. Which of the following is a supplementary service in mobile communication?

Answer: (C) Call forwarding
57. What does MMS stand for?
Answer: (B) Multimedia Messaging Service
58. Which layer of the OSI model handles SMS?
Answer: (A) Application layer
59. What is the function of IMS in LTE?
Answer: (C) Provides IP-based multimedia services
60. What is VoLTE?
Answer: (B) Voice over LTE
61. Which service uses the USSD protocol?
Answer: (A) Balance inquiries
62. What is the function of the CAMEL protocol?
Answer: (B) Enables advanced roaming features
63. What is the purpose of Emergency Call Setup?
Answer: (D) Ensures calls can be made without a SIM
64. What does the CLIR feature in mobile phones do?
Answer: (B) Hides the caller ID
65. What is RCS in mobile communication?
Answer: (C) Rich Communication Services

Section 11: General Concepts and Standards

66. What is the main drawback of 1G networks?

Answer: (A) Limited security and analog technology
67. What is the typical range of Bluetooth communication?
Answer: (B) 10 meters
 68. What is an IMSI?
Answer: (A) International Mobile Subscriber Identity
69. What is the role of the paging channel?
Answer: (B) Notify mobile devices about incoming calls
70. Which organization developed 5G NR standards?
Answer: (C) 3GPP
71. What is the significance of eSIM?
Answer: (D) Allows remote SIM provisioning
72. What is the function of a femtocell?
Answer: (C) Provide improved indoor coverage
73. What does latency refer to in mobile networks?
Answer: (A) Delay in data transmission
74. What is the significance of IPv6 in mobile networks?
Answer: (B) Increased address space
75. What is a key characteristic of IoT devices in mobile networks?
Answer: (A) Low power consumption

Section 12: Current Trends and Emerging Technologies

76. What is MEC in 5G?

Answer: (C) Multi-access Edge Computing
77. What is the role of AI in mobile networks?
Answer: (A) Optimize network performance
78. What is NB-IoT?
Answer: (B) Narrowband Internet of Things
79. What is the purpose of blockchain in mobile networks?
Answer: (C) Enhance security and authentication
80. Which technology enables device-to-device communication in 5G?
Answer: (D) Proximity services
81. What is the focus of Wi-Fi 6 compared to earlier versions?
Answer: (A) Higher efficiency and capacity
82. What is the benefit of quantum communication for mobile networks?
Answer: (C) Unhackable data transmission
83. What does green communication focus on?
Answer: (B) Reducing energy consumption
84. What is the purpose of LoRa in IoT?
Answer: (D) Low-power wide-area network communication
85. What is the role of virtualized RAN in 5G?
Answer: (A) Decouples hardware and software for flexible deployments

Section 13: Miscellaneous

86. Which modulation is used for AM radio broadcasting?

Answer: (A) Amplitude Modulation
87. What is a pico cell?
Answer: (B) Small cellular coverage area
88. What is the role of encryption in mobile communication?
Answer: (C) Secure data transmission
89. What is the purpose of antenna diversity?
Answer: (A) Improve signal quality
90. What is a core feature of cognitive radio?
Answer: (B) Dynamic spectrum access
91. What is the function of the RLC layer in LTE?
Answer: (C) Handle retransmissions
92. What is HARQ in mobile communication?
Answer: (D) Hybrid Automatic Repeat Request
93. Which type of antenna is commonly used in 5G?
Answer: (A) Phased array antennas
94. What is the purpose of 3GPP?
Answer: (B) Standardize mobile communication technologies
95. Which technology supports voice calls in 4G networks?
Answer: (B) VoLTE
96. What is the purpose of a repeater?
Answer: (C) Amplify and retransmit signals
97. Which band is commonly used for Wi-Fi?
Answer: (D) 2.4 GHz and 5 GHz
98. What is the maximum channel bandwidth in 5G?
Answer: (D) 400 MHz
99. What does AR stand for in the context of mobile applications?
Answer: (C) Augmented Reality
100. Which protocol supports fast mobility in 5G?
Answer: (B) SCTP