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Nokia 5G RAN Network Operations Expert Sample Questions:

1. In an EN-DC (E-UTRA New Radio Dual Connectivity) configuration, what role does the 5G NR cell typically play relative to the LTE cell?

A) The NR cell acts as the Master Node, with the LTE cell providing only supplementary capacity
B) The NR cell completely replaces the LTE cell and handles all signaling independently
C) The NR cell acts as a Secondary Node providing additional throughput, while the LTE cell acts as the Master Node and anchors control-plane signaling to the core network
D) EN-DC requires both cells to use identical PCI values to function

2. Why is an automatic fallback (rollback) mechanism important when activating new software on a base station?

A) It permanently deletes the previous software version immediately after a successful activation
B) It prevents the NOC from ever needing to monitor the base station after a software activation
C) It automatically applies the new software to all other base stations in the network simultaneously
D) It allows the base station to automatically revert to the previous, known-working software load if the new load fails to come into normal operation within a defined time, minimizing service downtime

3. A remote 5G site has redundant transport paths (primary and backup) providing OandM connectivity to NetAct. What is the main operational benefit of this redundancy?

A) It allows two mobile operators to share the same spectrum band
B) It removes the ongoing need for software updates
C) It doubles the radio coverage area of the cell
D) It allows continued remote management, alarm reporting, and visibility from the Operations Center if the primary transport path fails

4. A NOC engineer is preparing to remotely change a cell's duplex mode configuration from FDD to TDD. What critical dependency must be verified before this change can be successfully applied?

A) That the cell has an active SFTP connection to NetAct
B) That the site has access to a valid timing/synchronization reference (such as GNSS or PTP) required for TDD operation
C) That the cell's PLMN ID matches the neighboring cells' PLMN IDs
D) That all active alarms on the cell have been acknowledged

5. A NOC engineer notices that UEs in a cell are triggering handovers to a neighboring cell and then quickly handing back, repeating this cycle (a 'ping-pong' pattern). Which parameter adjustment is most likely to help reduce this behavior?

A) Increasing the PCI value of one of the two cells
B) Disabling the neighbor relation between the two cells entirely
C) Reducing the channel bandwidth of both cells
D) Increasing the handover event hysteresis and/or time-to-trigger values for the relevant measurement event between the two cells

Solutions: