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Nokia NRN-522 Exam Syllabus Topics:

Nokia 5G RAN Network Operations Expert Sample Questions:

1. After a field engineer completes a baseband module replacement and confirms physical installation is complete, which set of remote checks should the NOC engineer perform to verify successful restoration of service?

A) Confirm the cell(s) return to service without critical or major alarms, CPRI/eCPRI links to RF units are up, and relevant KPIs return to expected baseline levels
B) Confirm that the cell's PCI has automatically changed to a new value
C) Confirm only that the module's indicator light is the correct color, without checking any system-level status
D) Confirm the field engineer has left the site, without performing any further remote checks

2. Before a field engineer disconnects and removes an RF unit for replacement, what action should the NOC engineer typically perform first?

A) Administratively lock the affected cell(s) so the disconnection occurs in a controlled state rather than appearing as an unexpected fault
B) Change the cell's PLMN ID to prevent UEs from attempting to connect
C) Increase the transmit power of neighboring cells to compensate for the upcoming outage
D) Permanently delete the cell's configuration from NetAct

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

A) 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
B) It prevents the NOC from ever needing to monitor the base station after a software activation
C) It permanently deletes the previous software version immediately after a successful activation
D) It automatically applies the new software to all other base stations in the network simultaneously

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

A) Disregarding any alarm correlation information available
B) Replacing hardware components at random until the alarm clears
C) Assuming every fault automatically requires a full site rebuild
D) 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

5. After a field engineer replaces an RF unit, the NOC engineer observes that the eCPRI link between the baseband and the new RF unit remains down, even after the cell is unlocked. What should the NOC engineer do first?

A) Change the cell's PLMN ID to force the eCPRI link to re-establish
B) Permanently lock the cell and close the maintenance ticket as complete
C) Immediately order a replacement baseband module to be shipped to the site
D) Ask the field engineer to verify the physical fiber connections and SFP transceivers between the baseband and the new RF unit before pursuing further remote diagnosis

Solutions: