BASICS OF MOBILE COMMUNICATION

E4 - E5 CM
BASICS OF MOBILE COMMUNICATION
Q. 1 , In a cellular network, what is the main difference between traditional mobile service and the cellular concept?

A. Traditional mobile service uses one powerful transmitter, while the cellular concept uses many low-powered transmitters.

B. Traditional mobile service uses many low-powered transmitters, while the cellular concept uses one powerful transmitter.

C. Traditional mobile service and the cellular concept use the same type of transmitters.

D. Traditional mobile service and the cellular concept both use variable power levels.

View answer
Q. 2 , What is the basic geographic unit of a cellular system?

A. A cluster

B. A frequency

C. A channel

D. A cell

View answer
Q. 3 , What is the shape used to represent the geographic area covered by a cell in a cellular system?

A. Circle

B. Triangle

C. Square

D. Hexagon

View answer
Q. 4 , What is the primary reason why the true shape of a cell is not a perfect hexagon?

A. Natural terrain

B. Man-made structures

C. Power levels of neighboring cells

D. Channel interference

View answer
Q. 5 , What are the two main conditions that must be verified in order for a cellular system to work properly?

A. The power level of a transmitter within a single cell must be limited, and neighboring cells can share the same channels.

B. The power level of a transmitter within a single cell must be unlimited, and neighboring cells can share the same channels.

C. The power level of a transmitter within a single cell must be limited, and neighboring cells cannot share the same channels.

D. The power level of a transmitter within a single cell must be unlimited, and neighboring cells cannot share the same channels.

View answer
Q. 6 , What is a cluster in a cellular network?

A. A group of cells in which frequencies are reused

B. A group of cells in which frequencies are not reused

C. A group of transmitters within a single cell

D. A group of subscribers within a single cell

View answer
Q. 7 , What is the primary reason for grouping cells into clusters in a cellular network?

A. To increase the number of frequencies available for use

B. To decrease the interference between neighboring cells

C. To increase the power level of transmitters

D. To decrease the capacity of the cells

View answer
Q. 8 , What are the different types of cells used in a cellular network?

A. Macro, micro, pico, selective, and umbrella cells

B. Large, medium, and small cells

C. Primary, secondary, and tertiary cells

D. Red, green, and blue cells

View answer
Q. 9 , What is the purpose of using macro cells in a cellular network?

A. To cover remote and sparsely populated areas

B. To cover densely populated areas

C. To cover indoor areas

D. To cover areas with a particular shape and coverage

View answer
Q. 10 , What is the purpose of using micro cells in a cellular network?

A. To cover remote and sparsely populated areas

B. To cover densely populated areas

C. To cover indoor areas

D. To cover areas with a particular shape and coverage

View answer
Q. 11 , What is the purpose of using pico cells in a cellular network?

A. To cover remote and sparsely populated areas

B. To cover densely populated areas

C. To cover indoor areas

D. To cover areas with a particular shape and coverage

View answer
Q. 12 , Which of the following is NOT a feature of digital cellular systems?

A) Small cells

B) Large, power-hungry handsets

C) Frequency reuse

D) Seamless handovers

View answer
Q. 13 , What is the purpose of sectorisation in cellular networks?

A) To increase the number of prime interference sources

B) To reduce the number of base stations required

C) To reduce the level of interference by using directional antennas

D) To increase the size of the coverage area of each cell

View answer
Q. 14 , Which of the following is an objective of mobile communication?

A) Low interference

B) High subscriber density

C) Large coverage areas

D) Limited mobility

View answer
Q. 15 , Which sectorisation method is commonly used in cellular networks?

A) 90˚ sector

B) 120˚ sector

C) 180˚ sector

D) 240˚ sector

View answer
Q. 16 , What is the maximum coverage radius of a cellular system?

A) 1 km

B) 10 km

C) 30 km

D) 100 km

View answer
Q. 17 , What is the purpose of frequency reuse in cellular networks?

A) To reduce the level of interference

B) To increase the number of channels available

C) To decrease the number of base stations required

D) To increase the size of the coverage area of each cell

View answer
Q. 18 , Which of the following is NOT a feature of small, battery-powered handsets?

A) Low radio frequency

B) High subscriber density

C) Relatively short battery life

D) Portability

View answer
Q. 19 , What is a handover in cellular networks?

A) The transfer of a call from one base station to another as the mobile unit crosses cell boundaries

B) The switching of a mobile unit from one frequency to another

C) The transfer of a call from a mobile unit to a landline

D) The transfer of data between mobile units

View answer
Q. 20 , Which of the following is NOT an objective of mobile communication?

A) Seamless network architecture

B) High data rates

C) Low cost

D) Innovative services

View answer
Q. 21 , Which cellular technology is commonly used in Europe and Asia?

A) CDMA

B) TDMA

C) GSM

D) AMPS

View answer
Q. 22 , What is the purpose of adding cells in a cellular network?

A) To reduce the number of base stations required

B) To increase the size of the coverage area of each cell

C) To accommodate growth and provide coverage in uncovered areas

D) To increase the subscriber density of each cell

View answer
Q. 23 , What is the maximum subscriber density per MHz of spectrum allowed by frequency reuse in cellular networks?

A) 10

B) 100

C) 1000

D) 10,000

View answer
Q. 24 , Which of the following is a limitation of cellular networks?

A) Limited subscriber density

B) Limited coverage area

C) Limited mobility

D) Limited voice quality

View answer
Q. 25 , What is the benefit of using directional antennas in cellular systems?

a) It reduces the number of prime interference sources

b) It increases the number of prime interference sources

c) It has no effect on interference sources

d) It increases the size of the cell

View answer
Q. 26 , Which two commonly used methods of sectorisation are there?

a) 90˚ sector and 120˚ sector

b) 60˚ sector and 120˚ sector

c) 60˚ sector and 90˚ sector

d) 120˚ sector and 180˚ sector

View answer
Q. 27 , How many channel sets are required for a seven cell pattern using three sectors per cell?

a) 3

b) 7

c) 21

d) 63

View answer
Q. 28 , What is the advantage of frequency reuse in cellular networks?

a) It allows for a larger coverage area per cell

b) It reduces the number of base stations required

c) It allows for a much higher subscriber density per MHz of spectrum

d) It requires fewer frequencies to be allocated to the cellular network

View answer
Q. 29 , What is the purpose of handovers in cellular systems?

a) To increase the coverage area of each cell

b) To maintain seamless service as mobile users move between cells

c) To reduce interference between neighboring cells

d) To increase the capacity of the cellular network

View answer
Q. 30 , What are the basic geographic service areas created by a cellular mobile communications system called?

a) Spectrum

b) Channels

c) Cells

d) Handovers

View answer
Q. 31 , How are conversations handed over between cells in cellular systems?

a) By increasing the power level of the transmitter in the new cell

b) By decreasing the power level of the transmitter in the old cell

c) By switching the conversation to a different frequency

d) By executing a seamless transfer of the call from one base station to another

View answer
Q. 32 , What is one of the important objectives of mobile communication?

a) Increasing the size of the cell

b) Reducing the subscriber density

c) Providing innovative services

d) Limiting the use of radio spectrum

View answer
Q. 33 , What is one of the benefits of small, battery-powered handsets in cellular systems?

a) They enable the use of larger mobile units

b) They support lower subscriber densities than previous systems

c) They require more power than previous systems

d) They allow for higher subscriber densities and enable mobility

View answer
Q. 34 , What is the purpose of efficient use of radio spectrum in cellular systems?

a) To reduce the cost of the cellular network

b) To increase the subscriber density per MHz of spectrum

c) To limit the size of the cell

d) To decrease the efficiency of the network

View answer
Q. 35 , Which technology was the first design for mobile communication?

A. 1G

B. 2G

C. 3G

D. 4G

View answer
Q. 36 , What was the main service provided by the first generation of mobile communication?

A. Analog Voice

B. Digital Voice

C. SMS

D. Package Data

View answer
Q. 37 , Which generation of mobile communication introduced broadband data?

A. 2G

B. 2.5G

C. 3G

D. 4G

View answer
Q. 38 , What is the data bandwidth for 2G technology?

A. 1.9 kbps

B. 14.4 kbps

C. 384 kbps

D. 2 Mbps

View answer
Q. 39 , What is the data bandwidth for 4G technology?

A. 2 Mbps

B. 200 Mbps

C. 384 kbps

D. 14.4 kbps

View answer
Q. 40 , Which duplexing methodology uses different time slots for transmission and reception paths?

A. Frequency Division Duplexing (FDD)

B. Time Division Duplexing (TDD)

C.

D .

View answer
Q. 41 , Which duplexing methodology uses different frequencies for send and receive paths?

A. Frequency Division Duplexing (FDD)

B. Time Division Duplexing (TDD)

C.

D .

View answer
Q. 42 , Which duplexing methodology requires a duplexer for simultaneous transmission and reception?

A. Frequency Division Duplexing (FDD)

B. Time Division Duplexing (TDD)

C.

D .

View answer
Q. 43 , Which duplexing methodology does not require a duplexer?

A. Frequency Division Duplexing (FDD)

B. Time Division Duplexing (TDD)

C.

D .

View answer
Q. 44 , What is the main objective of mobile communication?

A. Any time Anywhere communication

B. Mobility & Roaming

C. High capacity & subscriber density

D. All of the above

View answer
Q. 45 , Which technology is based on IP-oriented unlimited multimedia data?

A. 2G

B. 2.5G

C. 3G

D. 4G

View answer
Q. 46 , Which technology has a data bandwidth of 384 kbps?

A. 2G

B. 2.5G

C. 3G

D. 4G

View answer
Q. 47 , Which technology was implemented in 1982?

A. 1G

B. 2G

C. 2.5G

D. 3G

View answer
Q. 48 , Which technology was implemented in 2002?

A. 2G

B. 2.5G

C. 3G

D. 4G

View answer
Q. 49 , Which technology is also known as Enhanced Data rates for GSM Evolution (EDGE)?

A. 2G

B. 2.5G

C. 3G

D. 4G

View answer
Q. 50 , Which technology uses GPRS as its standard?

A. 2G

B. 2.5G

C. 3G

D. 4G

View answer
Q. 51 , Which frequency bands are used for the Standard GSM 900 Band?

a. 1710-1785 MHz

b. 935-960 MHz

c. 890-915 MHz

d. 1805-1880 MHz

View answer
Q. 52 , Which frequency bands are used for the DCS 1800 Band?

a. 935-960 MHz

b. 890-915 MHz

c. 1805-1880 MHz

d. 1710-1785 MHz

View answer
Q. 53 , What is the duplex distance for the Standard GSM 900 Band?

a. 45 MHz

b. 95 MHz

c. 200 KHz

d. 13 Kbps

View answer
Q. 54 , What is the duplex distance for the DCS 1800 Band?

a. 45 MHz

b. 95 MHz

c. 200 KHz

d. 13 Kbps

View answer
Q. 55 , How many frequency channels are there in the Standard GSM 900 Band?

a. 374

b. 124

c. 200 KHz

d. 13 Kbps

View answer
Q. 56 , How many frequency channels are there in the DCS 1800 Band?

a. 374

b. 124

c. 200 KHz

d. 13 Kbps

View answer
Q. 57 , What is the voice coder bit rate for both the Standard GSM 900 Band and the DCS 1800 Band?

a. 45 MHz

b. 95 MHz

c. 13 Kbps

d. 270.8333 Kbps

View answer
Q. 58 , What is the modulation scheme used in both the Standard GSM 900 Band and the DCS 1800 Band?

a. GMSK

b. FDD

c. TDMA

d. CDMA

View answer
Q. 59 , What is the air transmission rate for both the Standard GSM 900 Band and the DCS 1800 Band?

a. 45 MHz

b. 95 MHz

c. 13 Kbps

d. 270.8333 Kbps

View answer
Q. 60 , What is the access method used in both the Standard GSM 900 Band and the DCS 1800 Band?

a. CDMA

b. FDMA/TDMA

c. FDD

d. TDMA

View answer
Q. 61 , What is the speech coder used in both the Standard GSM 900 Band and the DCS 1800 Band?

a. RPE-LTP

b. CDMA

c. GMSK

d. FDD

View answer
Q. 62 , What is the duplexing method used in both the Standard GSM 900 Band and the DCS 1800 Band?

a. FDD

b. CDMA

c. TDMA

d. FDMA/TDMA

View answer
Q. 63 , What is the GSM service area in the GSM network structure?

a. The area covered by one base station.

b. The area covered by a group of base stations.

c. The area covered by the entire network.

d. The area covered by the MSC.

View answer
Q. 64 , What does MS stand for in GSM?

A) Mobile Station

B) Mobile Service

C) Mobile Subscriber

D) Mobile Switching

View answer
Q. 65 , What is the purpose of SIM in GSM?

A) To provide radio equipment to the user

B) To store the subscriber's identity

C) To provide data communication only

D) To identify stolen mobile units

View answer
Q. 66 , What is IMEI in GSM?

A) International Mobile Subscriber Identity

B) International Mobile Equipment Identity

C) International Mobile Station Identity

D) International Mobile Service Identity

View answer
Q. 67 , Which number is used to identify the mobile subscriber by the land network?

A) MSISDN

B) IMSI

C) TMSI

D) HLR

View answer
Q. 68 , What is the primary identity of the subscriber within the mobile network in GSM?

A) MSISDN

B) IMSI

C) TMSI

D) HLR

View answer
Q. 69 , What is the purpose of TMSI in GSM?

A) To identify mobile units that are reported stolen

B) To identify the mobile subscriber

C) To identify the location of the mobile unit

D) To protect the subscriber from being identified by those attempting to monitor the radio channel

View answer
Q. 70 , How many different categories of mobile telephone units are specified by the European GSM system?

A) 2

B) 3

C) 4

D) 5

View answer
Q. 71 , What is the size of a SIM in GSM?

A) The size of a mobile phone

B) The size of a credit card

C) The size of a SIM slot in a mobile phone

D) The size of a SIM tray in a mobile phone

View answer
Q. 72 , What happens when a mobile subscriber enters three incorrect PIN codes in GSM?

A) The SIM is destroyed

B) The SIM is disabled

C) The SIM is locked

D) The SIM is reformatted

View answer
Q. 73 , What is the purpose of BTS in GSM?

A) To control one or more BSC

B) To handle common control functions within a BTS

C) To communicate with MSs in a certain area

D) To store subscriber's identity

View answer
Q. 74 , What is the interface between BSC and BTS called in GSM?

A) A interface

B) B interface

C) C interface

D) D interface

View answer
Q. 75 , What is the function of BSC in GSM?

A) To control one or more BTS

B) To handle common control functions within a BTS

C) To communicate with MSs in a certain area

D) To store subscriber's identity

View answer
Q. 76 , What is the maximum number of radio carriers that a BTS can typically handle in GSM?

A) 1-2

B) 2-3

C) 3-5

D) 5-8

View answer
Q. 77 , Which of the following is not a major network element in GSM?

a) MS

b) BSC

c) MSC

d) DSL

View answer
Q. 78 , What does MS stand for in GSM?

a) Mobile Station

b) Mobile Subscriber

c) Mobile Service

d) Mobile System

View answer
Q. 79 , What is the function of the IMEI in a mobile unit?

a) It identifies the mobile subscriber

b) It identifies the location of the mobile unit

c) It identifies the mobile equipment

d) It identifies the service provider

View answer
Q. 80 , Which of the following is not a number used to identify a mobile subscriber?

a) IMEI

b) MSISDN

c) IMSI

d) BMI

View answer
Q. 81 , What is a SIM card in GSM?

a) A type of mobile phone

b) A type of mobile network

c) A removable smart card with a microprocessor and memory

d) A type of computer software

View answer
Q. 82 , What is the purpose of the PIN in a SIM card?

a) To identify the mobile subscriber

b) To identify the location of the mobile unit

c) To ensure the security of the SIM card

d) To ensure the security of the mobile network

View answer
Q. 83 , What is a BTS in GSM?

a) A type of mobile phone

b) A type of mobile network

c) A set of base station equipment responsible for communicating with mobile stations in a certain area

d) A type of computer software

View answer
Q. 84 , What is the function of the BSC in GSM?

a) To handle common control functions within a BTS

b) To compare radio transmission and reception devices

c) To manage the interface between the BTS and the MSC

d) To manage the interface between the MS and the BTS

View answer
Q. 85 , What is the TRAU in GSM?

a) The equipment in which coding and decoding is carried out as well as rate adoption in case of data

b) The set of radio equipment responsible for communicating with mobile stations in a certain area

c) The set of transmission equipment responsible for managing the interface between the BTS and the MSC

d) The set of common control functions within a BTS

View answer
Q. 86 , What is the interface between the BSC and the BTS in GSM called?

a) A interface

b) B interface

c) C interface

d) D interface

View answer
Q. 87 , What is the interface between the BSC and the MSC in GSM called?

a) A interface

b) B interface

c) C interface

d) D interface

View answer
Q. 88 , What is the purpose of the standardized SS7 interface in GSM?

a) To allow the system operator to purchase switching equipment from one supplier and radio equipment and the controller from another

b) To provide a standardized interface between the BSC and the BTS

c) To provide a standardized interface between the BSC and the MSC

d) To provide a standardized interface between the MSC and the land network

View answer