4A0-M10 Online Practice Questions and Answers

A UE has a PDU session established using slice 1. The operator removes slice 1 from the UE subscription data stored in UDM. Which of the following actions is NOT performed as a result?

A. UDM notifies the serving AMF about the UE subscription data modification.

B. AMF initiates the UE configuration update procedure.

C. AMF requests the UE to release the established PDU session.

D. UE updates its slicing information with the data received from AMF.

Which of the following statements about 5G NG-RAN is FALSE?

A. The Xn interface is used to connect gNB to ng-eNB.

B. The NG interface is used to connect ng-eNB to UPF.

C. The Xn interface is used to connect ng-eNB to AMF.

D. The NG interface is used to connect gNB to NGC.

Which of the following statements about QoS profiles used in 5G is FALSE?

A. SMF derives the QoS profile of a QoS Flow from a PCC rule and sends it to NG-RAN.

B. NG-RAN uses the QoS profiles to create mapping between QoS Flow IDs and data radio bearers.

C. NG-RAN sends the QoS profiles and corresponding QoS Flow IDs to the UE.

D. Each QoS profile includes a 5G QoS Identifier (5QI) and an Allocation and Retention Priority (ARP).

Which of the following statements regarding the 5G security components is FALSE?

A. The authentication credential repository and processing function (ARPF) selects the authentication method to use for the UE.

B. The authentication server function (AUSF) handles authentication requests for both 3GPP and non3GPP access.

C. The security anchor function (SEAF) makes the final decision on UE authentication.

D. The security identifier de-concealing function (SIDF) decrypts the UE's SUCI to obtain its corresponding SUPI.

Which of the following statements about N2-based handover in 5GS is FALSE?

A. Handover signaling messages are exchanged between source and target NG-RAN nodes through AMF.

B. The serving AMF determines if it can continue to serve the UE and select a target AMF when required.

C. The serving SMF determines if the UPF terminating N3 can continue to serve the UE and selects a target I-UPF when required.

D. The SMF decides whether a direct or indirect downlink data forwarding path is to be used.

The exhibit below illustrates signaling messages exchanged during a 5GS to EPS Handover procedure using N26. Which information is NOT provided to AMF in step 6 for a PDU session that supports interworking?

A. PGW-U indirect data forwarding tunnel info for the corresponding PDN connection

B. PGW-C S5-C tunnel info for the corresponding PDN connection

C. PGW-U S5-U tunnel info for each EPS bearer

D. EPS bearer ID and QoS parameters for each EPS bearer

A connected UE moves from 5GS to EPS using the inter-system handover procedure with N26 interface. Which of the following actions is NOT performed?

A. Source gNB sends an NGAP Handover Required message to source AMF with handover type set to “NRtoLTE”.

B. Source AMF obtains session management contexts stored in UDM+HSS for each PDU session that supports interworking.

C. Source AMF sends a Forward Relocation Request message to the target MME and provides session management contexts.

D. Indirect downlink data forwarding paths are established from source gNB to target eNodeB.

Which of the following actions is NOT performed during an Xn-based Inter NG-RAN Handover with I-UPF Insertion procedure?

A. AMF determines that a new I-UPF needs to be added for a PDU session.

B. SMF provides N3 tunnel info of I-UPF to target gNB via AMF.

C. SMF provides N9 tunnel info of UPF PSA to I-UPF.

D. SMF provides N9 tunnel info of I-UPF to UPF PSA.

A UE is handed off from gNB1 to gNB2 using an N2-based handover procedure. The source I-UPF is to be relocated and an indirect data forwarding path is to be used. Which of the following statements is TRUE?

A. AMF decides that an in indirect data forwarding path is required and sends an indication to SMF.

B. gNB2 tunnel info is allocated for the indirect forwarding path and is included in the Handover Request Ack message sent to AMF.

C. Target I-UPF tunnel info is allocated for the indirect forwarding path and is provided to the UPF PSA.

D. UPF PSA tunnel info is allocated for the indirect forwarding path and is provided to the source I-UPF.

Which of the following best describes the Secondary Node Addition procedure?

A. Used to transfer bearer contexts from the master eNB to the secondary gNB.

B. Used to establish a UE context at the gNB for a UE that supports option 3X.

C. Used to establish connectivity from the gNB to the EPC.

D. Used to establish an X2 connection between the eNB and gNB.

Which of the following actions is performed when an idle UE moves from 5GS to EPS and the N26 interface is used?

A. UE initiates an Attach procedure and includes an EPS-GUTI derived from its 5G-GUTI.

B. For any PDU session that supports interworking, the serving SMF provides an SM context that includes mapped EPS bearers to the AMF.

C. AMF selects an SGW to serve the UE, and then sets up the required S5-U and S5-C GTP tunnels on the selected SGW.

D. AMF uses the EPS-GUTI derived from the UE 5G-GUTI to discover the MME, and then provides the UE context to the MME.

An AMF needs to know when an SMF deregisters with the NRF. Which of the following NRF APIs should the AMF use?

A. Nnrf_NFManagement_NFUpdate Request

B. Nnrf_NFDiscovery_NFDiscover Request

C. Nnrf_NFManagement_NFStatusSubscribe Request

D. Nnrf_NFManagement_NFDeregister Request

Which of the following statements about 5G QoS Flows is FALSE?

A. A QoS Flow is the finest granularity of QoS differentiation within a PDU session.

B. A PDU session has one or more QoS Flows.

C. All QoS Flows of a PDU session are served by a single N3 GTP-U tunnel.

D. Each QoS Flow is served by a dedicated data radio bearer.

Which 5GS network function allows UE connectivity to 5GC through non-3GPP access networks?

A. SEPP

B. N3IWF

C. NWDAF

D. NEF

Which of the following statements about non-access stratum mobility management (NAS-MM) protocol is TRUE?

A. It runs between the UE and the SMF.

B. It is used to control user plane resources between the UE and a data network.

C. It provides common procedures such as authentication, identification, and UE configuration update.

D. NAS-MM messages are relayed transparently by the AMF.