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Nokia NRN-522 Exam Syllabus Topics:

Nokia 5G RAN Network Operations Expert Sample Questions:

1. Which of the following best describes 'fault isolation' as performed by NOC technical support before deciding whether to dispatch a field engineer?

A) Using available remote diagnostics - alarms, correlation, PM data, interface status, and logs - to determine whether the fault likely lies in the baseband, RF, transport, or external/environmental domain
B) Disregarding any alarm correlation information available
C) Assuming every fault automatically requires a full site rebuild
D) Replacing hardware components at random until the alarm clears

2. A NOC engineer reviewing UE measurement reports notices that two physically adjacent 5G cells are broadcasting the identical Physical Cell Identity (PCI), causing UEs to receive ambiguous reference signals.
What is this condition called, and what is the appropriate remote corrective action?

A) This is a normal configuration and requires no action, since PCI values can be safely reused on adjacent cells
B) This is a PCI collision, and it should be resolved by reassigning a unique PCI value to one of the conflicting cells
C) This is PCI confusion, and the only remedy is to delete the neighbor relation between the two cells
D) This is PCI confusion, and it should be resolved by adjusting the cells' reference signal power

3. What is the function of cell reselection priority parameters configured for idle-mode UEs across different frequency layers (e.g., 5G vs. 4G, or different 5G bands)?

A) They determine the encryption keys used for signaling on each frequency layer
B) They guide idle-mode UEs toward preferred frequency layers or cells, influencing which layer a UE camps on when multiple suitable options are available
C) They determine which UEs are allowed to register on the network at all
D) They define the maximum transmit power for each frequency layer

4. An AirScale base station simultaneously raises a 'Cell Out of Service' alarm and an 'RF unit communication failure' alarm. How should a NOC engineer typically interpret this combination using alarm correlation principles?

A) The RF unit communication failure is the likely root cause, and the cell out of service alarm is a resulting symptom alarm
B) The cell out of service alarm is always the cause of hardware failures
C) The two alarms are unrelated and must be investigated as two separate independent faults
D) NetAct can only display one alarm per base station at a time

5. A NOC team is investigating a degradation in E-RAB / QoS flow setup success rate for a specific gNB.
Which approach is MOST effective for identifying the root cause?

A) Reviewing only high-level marketing performance summaries
B) Correlating the KPI degradation with active alarms, recent configuration changes, and relevant counters (e.g., resource congestion, transport, signaling) for that gNB during the affected period
C) Restarting NetAct entirely without further analysis
D) Assuming the cause is always the subscribers' devices without checking network-side data

Solutions: