UMTS Multiple Choice Questions with Answers:-
1) This interface enables the RNC to maintain Radio Resource Management (RRM) independently.
A. Our
B. Iub
C. Iu
D. None of the choices
Ans: A
2) Wideband switching in the RNC makes the element structure of RNC remarkably different to element structure of BSC in GSM BSS during implementation.
A. True
B. False
Ans: A
3) What are the RNC functions to control radio resource connection (RRC) that require an active bearer (e.g. connection-based functions)?
A. Handover Control, Micro Diversity
B. Load Control
C. Admission Control
D. Packet Scheduler
E. Resource Manager
F. Power Control
Ans: A, F
4) These are used to manage the amount of power being transmitted and the number of subscribers in a cell. This control is important when introducing new bearer allocations into the network
A. Power Control and Load Control
B. Load Control and Admission Control
C. Load Control and Packet Scheduler
D. Resource Manager and Power Control
Ans: B
5) Which RNC function is responsible for allocation of bearer?
A. Load Control
B. Admission Control
C. Micro Diversity
D. Resource Manager
Ans: D
6) The main RRC states are detached, idle and connected.
A. True
B. False
Ans: B
7) From the UE to the network connection point of view, the RRC changes its state from idle to connected.
A. True
B. False
Ans: A
8) For any user exchange of user data and signaling between the UE and the network, the RRC-connected state can be considered a prerequisite.
A. True
B. False
Ans: A
9) When there is no RRC connection between the mobile and the network, but the mobile is switched on, the mobile is considered to be in _____ mode. It means that the mobile is listening to one base station and is in readiness to start a connection, or is waiting to be paged.
A. standby
B. detached
C. idle
D. attached
Ans: C
10) In this RRC mode/state, a dedicated channel is provided to the subscriber. In this state, the UE is sending measurement reports to the network, which enables the system to control the dedicated bearer and perform handovers.
A. Cell_PCH
B. Cell_FACH
C. Cell_DCH
D. URA_PCH
Ans: C
11) In this RRC mode, the mobile is only sending small pieces of information to the network, for example, irregular Internet-based traffic or for signaling. The network does not perform handovers as the mobile moves from one cell to another. The UE just informs the network about its current location
A. Cell_PCH
B. Cell_FACH
C. Cell_DCH
D. URA_PCH
Ans: B
12) In this RRC mode, the network bearer is not being used for a long time but the mobile is still known to a cell level. In this state, the UE is using a Diagnostics Repetition Function (DRX) to save battery. No handover is needed when the mobile moves from one cell to another.
A. Cell_PCH
B. Cell_FACH
C. Cell_DCH
D. URA_PCH
Ans: A
13) In this RRC mode, a handover is needed when the mobile moves from one cell to another.
A. Cell_PCH
B. Cell_FACH
C. Cell_DCH
D. URA_PCH
Ans: C
14) In this URA_DCH RRC mode, the mobile is not being used for a long time but the mobile is known on the RNC level only.
A. True
B. False
Ans: B
15) RRC as an entity is composed of two items, Medium Access Control (MAC) and Radio Link Control (RLC). Together these two are also called as Layer 3 processing.
A. True
B. False
Ans: B
16) Transmission/Reception functions of the physical layer include: – mapping to physical channels – spreading, – modulation – power amplification and…
A. Channel coding and interleaving
B. Frame error correction
C. Multiplexing of transport channels
D. Bit error correction
Ans: A, C
17) A frequency and a code characterize a physical layer.
A. True
B. False
Ans: A
18) The MAC layer performs scheduling and mapping of logical channel data onto the transport channels provided by the physical layer.
A. True
B. False
Ans: A
19) For common transport channels, the MAC layer adds addressing information to distinguish data flows intended for different handsets.
A. True
B. False
Ans: A
20) In GSM, there is a possibility to dynamically switch one logical channel (data flow) onto different transport channel types, based on the activity of the subscriber.
A. True
B. False
Ans: B
21) The Radio Link Control protocol operates in one of three modes: transparent, unacknowledged, or acknowledged mode. It performs segmentation/reassembly functions and, in unacknowledged mode, provides an assured mode delivery service by use of retransmission.
A. True
B. False
Ans: B
22) RLC provides service for RRC signaling to the Radio Access Bearer and for the user data transfer, the Signaling Radio Bearer.
A. True
B. False
Ans: B
23) The following are RRC layer controls the following EXCEPT:
A. Radio Bearers
B. Physical Channels
C. Mapping of the different channel types
D. Handover
E. Measurement and other Mobility procedures
F. None of the choices
Ans: F
24) Ciphering of non-real time date is done by the RLC.
A. True
B. False
Ans: A
25) Which of the following is a function of RLC?
A. Ciphering of RT data
B. Selection of common or dedicated channels
C. Selection of data to be inserted in the radio frame
D. Retransmission across the air (Your Answer)
Ans: D
UMTS Objective Questions Pdf free download::
26) Which of the following is a function of MAC?
A. Segmentation
B. Ciphering of NRT data
C. Buffering
D. Multiplexing of logical channels into the same transport channels
Ans: D
27) When a WCDMA network is planned, one of the basic criteria for planning is to define the acceptable interference level, with which the network is expected to function correctly. This planning based value and the actual signals the UE transmit set practical limits for the Uu interface capacity.
A. True
B. False
Ans: A
28) The main task of Load Control is to estimate whether a new call can have access to the system without sacrificing the bearer requirements of existing calls. Based on this, the RNC grants or rejects the access.
A. True
B. False
Ans: B
29) SIR is also called Interference Margin and has a direct relationship with the cell load.
A. True
B. False
Ans: A
30) Interference Margin = 10 * (Log(1/(1-Load_Factor))) where Load_Factor is any number from 0 to 1
A. True
B. False
Ans: A
31) When the cell load exceeds 70%, the interference in that cell will be very difficult to control.
A. True
B. False
Ans: A
32) WCDMA radio network normally dimensioned with an expected capacity equivalent to Load Factor value 0.7 or 70%.
A. True
B. False
Ans: B
33) What do you call the value that represents a sensible cell load on which when the load is approaching this value, Traffic Handovers (TRHO) are performed?
A. PRX_Target
B. PRX_TARGET_BS
C. SIR
D. All of the choices
Ans: A
34) Since PRX_Target defines the planned load of the cell, maximum traffic admission is done up to this level in the cell.
A. True
B. False
Ans: B
35) The second level of value known as the PRX_TARGET_BS is used by the RNC to stop situations of congestion. Once this value is reached, the RNC takes actions to reduce the load in a cell.
A. True
B. False
Ans: B
36) It is a general feature that handles scheduling radio resources for Non-Real-Time (NRT) radio access bearers for both uplink and downlink directions.
A. Radio Link Control
B. Packet Scheduler
C. Micro Diversity
D. Buffering
Ans: B
37) Packet scheduler makes the decision of the used channel type for the uplink direction.
A. True
B. False
Ans: B
38) There are 8192 DL scrambling codes used, 8 in each of the 512 code groups.
A. True
B. False
Ans: B
39) Its purpose is to optimize the capacity of a cell and prevent an overload situation to maintain the stability of the system. It consists of AC algos, PS algos, and LC, which updates the load status of the cell based on resource measurements and estimations provided by AC and PS.
A. Power Control
B. Load Control
C. Admission Control
D. Resource Manager
Ans: B
40) In terms of overload control, the Load Control function of the RNC is both preventive and corrective.
A. True
B. False
Ans: A
41) Interference is the main resource criterion for CDMA system; the following load control measures are practiced: – UL total received wideband interference power – DL total transmission power – One RNC on cell basis periodically under.
A. True
B. False
Ans: A
42) Traffic in a cell can be categorized by priority, depending on the traffic type (Conversational, Streaming, Interactive, Background). The categories can be subdivided into RT and NRT traffic.
A. True
B. False
Ans: A
43) Above Ptx_threshold or Prx_threshold, Overload control of LC and PS decreases bitrate and drops NRT bearers
A. True
B. False
Ans: A
44) Above Ptx_target + Ptx_offset, Preventive control of LC, AC does not admit new bearers, PS decreases bitrate of NRT
A. True
B. False
Ans: A
45) Above Ptx_target, No actions done by LC, AC does not admit new bearers, PS does not increase NRT load but can change bitrate
A. True
B. False
Ans: A
46) Both scrambling and channelization codes are maintained by RNC.
A. True
B. False
Ans: A
47) Spreading code by definition is the same as scrambling code X channelization code.
A. True
B. False
Ans: A
48) It means the phenomenon where the probability of the blocked branch of the code tree increases too much and thus it starts to prevent new accesses to the system
A. Code blocking
B. Code handover
C. Fragmentation
D. None of the choices
Ans: C
49) The channelization code has the same length as the baseband data.
A. True
B. False
Ans: A
50) Channelization codes could change during a connection.
A. True
B. False
Ans: A