nokia 4A0-M03 Exam Questions
Questions for the 4A0-M03 were updated on : Nov 21 ,2025
Page 1 out of 3. Viewing questions 1-15 out of 40
Question 1
If the selected SGW fails, which SGW/PGW will MME select if ‘gateway selection mode 2’ is used?
- A. A new SGW, but new PGW selection is not required
- B. A new SGW first, then select a new PGW that is topologically closest to the newly selected SGW
- C. A new SGW first, then select a new PGW with the best order and preference values
- D. The next topologically closest SGW/PGW pair
Answer:
A
Question 2
Which of the following statements regarding SGW selection by the MME is FALSE?
- A. SGW selection can occur during initial attach, tracking area update, or handover procedures
- B. MME can select an SGW by performing a DNS query on a given TAI FQDN
- C. MME can select an SGW based on the overload control information received from each SGW in the SGW pool
- D. MME can select an SGW from the SGW pool(s) configured to serve the given TAI
Answer:
C
Question 3
What information does eNodeB use to ensure MME load balancing during MME selection?
- A. MME relative capacity value received from each MME in the pool
- B. MME capacity value received from the UE attach request message
- C. MME capacity value from the UE’s subscription data received from the HSS
- D. MME relative capacity value calculated by each MME based on the current network load
Answer:
A
Question 4
The DNS NAPTR records shown in the exhibit are returned to the MME during SGW/PGW selection.
If gateway selection mode 1 is used, which SGW/PGW pair is selected by the MME?
- A. sgw01 and pgw01
- B. sgw01 and pgw02
- C. sgw02 and pgw01
- D. sgw02 and pgw02
Answer:
B
Question 5
Which of the following statements regarding paging policy is FALSE?
- A. Paging method defines which forwarding path is used to forward the paging message to eNodeBs
- B. Paging policy defines paging procedures used by MME to page an idle UE
- C. Paging timer specifies the time to wait for a response to a paging request message
- D. Paging attempt specifies the number of times MME tries to page a UE before the UE is deemed non- responsive
Answer:
A
Question 6
Which of the following statements best describes a home PLMN?
- A. A network where a UE is currently registered and has a different PLMN ID from the UE’s PLMN ID
- B. A provisioned network that is shared by multiple operators
- C. A network where a UE is currently being served
- D. A network where a UE is subscribed
Answer:
C
Question 7
Which of the following statements regarding handover is FALSE?
- A. Handover can occur when UE is in ECM-CONNECTED state
- B. S1-based handover is used when X2-based handover attempt failed
- C. During X2-based handover, MME may remain the same or be relocated
- D. S1-based handover is used when there is no X2 interface between source and target eNodeBs
Answer:
C
Question 8
Which of the following is NOT a characteristic of the home routed roaming architecture?
- A. Bearer traffic is routed from the SGW to the PGW over the S5 interface
- B. The UE bearers are anchored at the SGW to the VPLMN
- C. Subscriber services are obtained through the HPLMN
- D. The MME in the VPLMN has an S6a interface to the HSS in the HPLMN
Answer:
A
Question 9
Which of the following functions is NOT performed by MME when it receives a TAU from a UE?
- A. Perform message integrity check
- B. Inform HSS of the UE’s current location
- C. Check if UE requests access to a restricted tracking area
- D. Send paging message to a list of SGWs belonging to UE’s registered tracking area
Answer:
D
Question 10
Given the exhibit, which component initiated a mobile-terminated location request (MT-LR)
procedure for external LCS client?
- A. MME
- B. GMLC
- C. E-SMLC
- D. HSS
Answer:
D
Reference:
https://www.google.com/url
?
sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiEuu_cmrnsAhXiD2MBHQUND3AQFjAAeg
QIBhAC&url=ftp%3A%2F%2Fwww.3gpp.org%2Ftsg_sa%2FWG5_TM%2FTSGS5_68%2F_specs_for_ch
ecking% 2Fupgrade%2F32271-900.doc&usg=AOvVaw1w-IpeUNE8VTNAgojrdFa4
Question 11
Given the exhibit, which type of message is sent from the MME to the lawful enforcement
monitoring facility (LEMF) for lawful interception support?
- A. Intercept request message
- B. Location request message
- C. Content of communication (CC) message
- D. Intercept related information (IRI) message
Answer:
C
Question 12
What network component(s) is/are shared in the gateway core network (GWCN) sharing architecture
model?
- A. Only E-UTRAN is shared
- B. Only MME is shared
- C. E-UTRAN and MME are shared
- D. MME and PGW are shared
Answer:
B
Question 13
Which logical interface is used to transfer UE information from one MME to another MME during
relocation?
- A. S10
- B. S3
- C. S6a
- D. S13
Answer:
A
Reference:
https://www.cablefree.net/wirelesstechnology/4glte/lte-interfaces/
Question 14
Which of the following regarding logging architecture in Nokia CMM is FALSE?
- A. Log files can be retrieved under the “/data-logs” folder.
- B. Different log files are generated automatically in the system.
- C. Logs are generated based on log events.
- D. Details about each log can be displayed using the verbose (-v) flag.
Answer:
A
Question 15
Given the exhibit, the MME is unable to retrieve authentication vector (AV) from the HSS and the
initial UE attach fails.
Which of the following actions is useful for troubleshooting this problem?
- A. Verify if the IMSI to HSS mapping list is configured properly.
- B. Verify if a GTP profile is associated with the S6a interface.
- C. Verify if the TAI value matches between the MME and the HSS.
- D. Verify if the DNS server is provisioned to dynamically discover the HSS IP address.
Answer:
D