Systra Round 2 - Umts Air Interface Technology

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Systra Round 2 - Umts Air Interface Technology - Quiz


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Questions and Answers
  • 1. 

    ______ defines the way how two communicating entities will communicate with each other.

    Explanation
    Duplex refers to the way in which two communicating entities will communicate with each other. It defines whether the communication is one-way or two-way, and whether it can occur simultaneously or not. In a duplex communication, both entities can send and receive data simultaneously, allowing for more efficient and real-time communication.

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  • 2. 

    What way of  communication is being used in television broadcast?

    • A.

      Duplex

    • B.

      Simplex

    • C.

      Half-duplex

    Correct Answer
    B. Simplex
    Explanation
    Television broadcast uses simplex communication. Simplex communication is a one-way communication method where information flows in only one direction. In the case of television broadcast, the information is transmitted from the broadcasting station to the viewers' television sets. The viewers cannot send any feedback or response back to the broadcasting station through the same channel. Therefore, simplex communication is the appropriate way of communication for television broadcast.

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  • 3. 

    What method of communication allows partlies to communicate in two-ways but not simultaneously?

    • A.

      Duplex

    • B.

      Simplex

    • C.

      Half-duplex

    Correct Answer
    C. Half-duplex
    Explanation
    Half-duplex communication allows parties to communicate in two-ways but not simultaneously. This means that each party can send and receive messages, but only one party can transmit at a time while the other party listens. It is like a walkie-talkie where one person speaks and then waits for the other person to respond. This method is commonly used in radio communication, where there is a need for back-and-forth communication but not at the same time.

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  • 4. 

    ______ is a  method of communication similar to half-duplex  but allows simultaneous communication

    Correct Answer
    full-duplex
    full duplex
    fullduplex
    Explanation
    Full-duplex is a method of communication that allows simultaneous communication. Unlike half-duplex, where communication can only occur in one direction at a time, full-duplex enables both parties to transmit and receive data simultaneously. This means that there is no need for a waiting period or switching between sending and receiving modes. Full-duplex communication is commonly used in technologies such as telephone systems, computer networks, and wireless communication devices.

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  • 5. 

    FDD stands for _____.

    Correct Answer
    Frequency Division Duplex
    Explanation
    FDD stands for Frequency Division Duplex. This refers to a method of communication where the frequency spectrum is divided into separate channels for transmitting and receiving data simultaneously. This allows for two-way communication to occur at the same time, with one channel dedicated for transmitting and the other for receiving. FDD is commonly used in wireless communication systems such as cellular networks, where it enables simultaneous voice and data transmission.

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  • 6. 

    TDD stands for ______.

    Correct Answer
    Time Division Duplex
    Explanation
    TDD stands for Time Division Duplex. Time Division Duplex is a communication technique where the transmission and reception of signals occur at different time intervals within the same frequency band. This allows for two-way communication using a single frequency, with the transmitter and receiver taking turns to transmit and receive data. TDD is commonly used in wireless communication systems, such as cellular networks, to enable simultaneous two-way communication between devices.

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  • 7. 

    TDD splits the frequency band into two sub-bands- one for the uplink and one for the downlink.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    TDD (Time Division Duplex) splits the time, not the frequency band, into two sub-bands - one for the uplink and one for the downlink.

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  • 8. 

    TDD uses only one frequency band for the two-way communication.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    TDD (Time Division Duplex) is a communication method that allows for two-way communication using a single frequency band. This means that the same frequency is used for both transmitting and receiving signals, but at different time intervals. This allows for efficient use of the frequency band and enables simultaneous communication in both directions. Therefore, the statement that TDD uses only one frequency band for two-way communication is true.

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  • 9. 

    FDD is advantageous for using minimal frequency resource.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    FDD stands for Frequency Division Duplexing, which is a method used in telecommunications to allow simultaneous transmission of signals in both directions on the same frequency band. It divides the available frequency spectrum into two separate bands, one for the uplink (transmitting from the user to the base station) and one for the downlink (transmitting from the base station to the user). FDD allows for full duplex communication, but it does not necessarily minimize the use of frequency resources.

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  • 10. 

    In FDD, collision may occur during communication while in TDD, collision can be avoided between the uplink and the downlink.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    In Frequency Division Duplexing (FDD), both the uplink and the downlink use separate frequency bands, which means that collision can be avoided as the communication is happening on different frequencies. On the other hand, in Time Division Duplexing (TDD), the uplink and the downlink share the same frequency band, but they are separated by time slots. This means that collision can occur during communication if the uplink and downlink transmissions overlap in time. Therefore, the statement that collision can be avoided between the uplink and the downlink in TDD is incorrect.

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  • 11. 
    - ProProfs

    • A.

      TDD

    • B.

      FDD

    Correct Answer
    B. FDD
  • 12. 
    - ProProfs

    • A.

      TDD

    • B.

      FDD

    Correct Answer
    A. TDD
    Explanation
    TDD stands for Test-Driven Development. It is a software development approach in which tests are written before the actual code is implemented. This allows developers to have a clear understanding of the expected behavior of the code and helps in identifying any errors or bugs early in the development process. TDD promotes a more structured and organized approach to software development, leading to better code quality and easier maintenance. FDD, on the other hand, stands for Feature-Driven Development, which is a different software development methodology focused on iterative and incremental development based on features.

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  • 13. 

    Which frequench range was NOT allocate by IMT-2000 for world-wide mobile communication implementation?

    • A.

      806MHz-960MHz

    • B.

      1110MHz-1750MHz

    • C.

      1710MHz-2025MHz

    • D.

      2110MHz-2200MHz

    • E.

      2500MHz-2690MHz

    Correct Answer
    B. 1110MHz-1750MHz
  • 14. 

    What size is the channel spacing in UMTS?

    • A.

      1MHz

    • B.

      3MHz

    • C.

      5Mhz

    • D.

      7Mhz

    Correct Answer
    C. 5Mhz
    Explanation
    UMTS (Universal Mobile Telecommunications System) has a channel spacing of 5MHz. Channel spacing refers to the frequency separation between adjacent channels in a communication system. In UMTS, this spacing is set at 5MHz, which allows for efficient utilization of the available frequency spectrum. This spacing ensures that different channels do not interfere with each other, enabling multiple users to access the network simultaneously without significant interference or degradation in performance.

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  • 15. 

    An operator needs ______ channels to be able to build a high-speed, high-capacity network.

    • A.

      8-12

    • B.

      5-9

    • C.

      3-4

    Correct Answer
    C. 3-4
    Explanation
    An operator needs 3-4 channels to be able to build a high-speed, high-capacity network. This means that the operator requires a minimum of 3 and a maximum of 4 channels in order to create a network that can handle large amounts of data at a fast speed. Having fewer than 3 channels would limit the network's capacity and speed, while having more than 4 channels may not significantly improve the network's performance.

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  • 16. 

    The goal of a network operator is to achieve a higher capacity with fewer resources.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    A network operator aims to achieve a higher capacity with fewer resources in order to optimize the efficiency and performance of the network. By maximizing the capacity of the network while minimizing the resources required, the operator can provide better services to users and reduce costs. This can be achieved through various strategies such as upgrading equipment, optimizing network configurations, and implementing efficient traffic management techniques. Overall, the goal is to improve the network's capabilities and performance while minimizing resource utilization.

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  • 17. 

    FDMA stands for ____.

    Correct Answer
    Frequency Division Multiple Access
    Explanation
    FDMA stands for Frequency Division Multiple Access. This is a technique used in telecommunications to divide the available frequency bandwidth into multiple channels, allowing multiple users to share the same physical medium simultaneously. Each user is assigned a unique frequency band, and they can transmit and receive data using that specific frequency. This helps in maximizing the utilization of the available bandwidth and allows for efficient communication between multiple users.

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  • 18. 

    In FDMA,  used frequency band is divided into different carriers and the same number of carriers is used for both uplink and downlink.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    In FDMA (Frequency Division Multiple Access), the used frequency band is divided into different carriers. These carriers are then assigned to different users for communication. In this process, the same number of carriers is used for both the uplink (transmission from the user to the base station) and the downlink (transmission from the base station to the user). Therefore, the statement "In FDMA, used frequency band is divided into different carriers and the same number of carriers is used for both uplink and downlink" is true.

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  • 19. 

    Each carrier in FDMA is indexed using UARFCN which stands for ______.

    • A.

      UTRA alternate radio frequency control number

    • B.

      UTRA absolute radio frequency control number

    • C.

      UTRA authentication radio frequency control number

    • D.

      UTRA absolute radio frequency carrier number

    Correct Answer
    D. UTRA absolute radio frequency carrier number
    Explanation
    The correct answer is UTRA absolute radio frequency carrier number. UARFCN stands for UTRA absolute radio frequency carrier number, which is used to index each carrier in FDMA (Frequency Division Multiple Access) systems. UARFCN is a unique identifier that specifies the frequency of the carrier in the UTRA (Universal Terrestrial Radio Access) system.

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  • 20. 

    TDMA stands for ______.

    Correct Answer
    Time Division Multiple Access
    Explanation
    TDMA stands for Time Division Multiple Access. This is a method of digital communication where multiple users share the same frequency channel by dividing it into different time slots. Each user is allocated a specific time slot during which they can transmit their data. This allows multiple users to access the same channel without interference. TDMA is commonly used in cellular networks to allow multiple users to make simultaneous calls on the same frequency.

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  • 21. 

    In TDMA, one timeslot is divided into multiple carrier.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is incorrect. In TDMA (Time Division Multiple Access), one timeslot is not divided into multiple carriers. Instead, one timeslot is divided into multiple time slots, each allocated to a different user or communication channel.

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  • 22. 

    CDMA stands for ________.

    Correct Answer
    Code Division Multiple Access
    Explanation
    CDMA stands for Code Division Multiple Access. This technology is used in telecommunications to allow multiple users to share the same frequency band simultaneously. Unlike other multiple access methods, CDMA uses unique codes to differentiate between different users, allowing them to transmit and receive data at the same time. This technology is commonly used in mobile communication systems, such as 3G and 4G networks, to provide efficient and secure communication.

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  • 23. 

    In CDMA, the capacity of a cell is a function of power allowed within the cell instead of the available slots in the air interface.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    In CDMA (Code Division Multiple Access), the capacity of a cell is determined by the power allowed within the cell, rather than the available slots in the air interface. This means that the number of users that can be accommodated in a cell is dependent on the power that can be allocated to each user, rather than the number of available time slots. Therefore, the statement "In CDMA, the capacity of a cell is a function of power allowed within the cell instead of the available slots in the air interface" is true.

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  • 24. 

    In CDMA, each subscriber adds to the interference in the cell untill the interference reaches a certain limit or threshold.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    In CDMA (Code Division Multiple Access), each subscriber contributes to the interference in the cell until the interference reaches a certain limit or threshold. This is because CDMA allows multiple users to share the same frequency band by assigning unique codes to each user's signal. However, as more users are added, the interference level increases, which can degrade the overall performance of the system. Therefore, it is true that each subscriber adds to the interference in CDMA.

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  • 25. 
    - ProProfs

    • A.

      CDMA

    • B.

      TDMA

    • C.

      FDMA

    Correct Answer
    C. FDMA
    Explanation
    FDMA stands for Frequency Division Multiple Access. It is a technique used in telecommunications to divide the available frequency spectrum into multiple channels, with each channel assigned to a different user. This allows multiple users to access the network simultaneously without interference. In FDMA, each user is allocated a specific frequency band, and they can transmit and receive data within that band without interfering with other users. This method is commonly used in analog cellular networks to provide multiple voice and data connections.

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  • 26. 
    - ProProfs

    • A.

      CDMA

    • B.

      TDMA

    • C.

      FDMA

    Correct Answer
    B. TDMA
    Explanation
    TDMA stands for Time Division Multiple Access. It is a digital communication technology that allows multiple users to share the same frequency channel by dividing the available time slots. Each user is assigned a specific time slot within the channel, and they take turns transmitting their data during their assigned time slot. This allows for efficient use of the frequency spectrum and reduces interference between users.

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  • 27. 
    - ProProfs

    • A.

      CDMA

    • B.

      TDMA

    • C.

      FDMA

    Correct Answer
    A. CDMA
    Explanation
    CDMA stands for Code Division Multiple Access, which is a digital cellular technology that allows multiple users to share the same frequency band simultaneously by assigning a unique code to each user. This enables efficient use of the available bandwidth and increases the capacity of the network. In CDMA, each user's signal is spread over the entire frequency band, and the receiver uses the same code to separate and decode the desired signal. This allows for better call quality, increased capacity, and improved security compared to other multiple access techniques like TDMA (Time Division Multiple Access) and FDMA (Frequency Division Multiple Access).

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  • Current Version
  • Aug 28, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 10, 2011
    Quiz Created by
    Ravenclaw_quiz

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