Huawei HCIA-5G-RAN (H35-480) Certification Sample Questions

01. A service test is being defined for a live site. The operator wants to know first whether users can obtain service at all, before asking how well it performs.
Which two measurements answer the first question?
(Choose two.)
a) The downlink throughput achieved once a session is running
b) The received power recorded at each test point
c) The round-trip latency measured across an established session
d) The proportion of registration attempts that succeed
e) The proportion of PDU session establishment attempts that succeed

02. An operator wants connected handsets in an NR cell to stay silent while the serving cell is adequate, and to begin sending measurement reports once the serving cell's measured level has dropped past a value the operator has chosen.
Which measurement event matches that condition?
a) Event A2, which reports that the serving cell has fallen below a configured value.
b) Event A1, which reports that the serving cell has become better than a configured value.
c) Event A4, which reports that a neighboring cell has become better than a configured value.
d) Event B1, which reports that a cell of another radio access technology has passed a configured value.

03. The operator's acceptance criterion for this route reads: downlink throughput at or above 150 Mbit/s in at least 90% of samples. The completed route test records 1,240 samples, of which 92% are at or above 150 Mbit/s. The mean of all samples is 210 Mbit/s and the lowest sample is 38 Mbit/s.
How does the result read against the criterion?
a) It fails, because samples as low as 38 Mbit/s were recorded on the route
b) It passes, because the mean of 210 Mbit/s is well above the stated figure
c) It passes, because 92% of samples met the stated 90% share
d) It is inconclusive, because the criterion does not say how many samples are required

04. A change window on an in-service site closes at 03:00, after which the site returns to protected hours and further work needs a fresh approval. It is now 02:30. The configuration change went in late and the site has accepted it. A fresh backup was taken before the work began and confirmed as restorable. Verifying the change takes about twenty-five minutes, and restoring the verified backup takes about fifteen.
Which course of action is the better one?
a) Verify the change now, and restore the backup after the window closes if the verification fails.
b) Restore the verified backup now, so the site returns to a known state inside the window.
c) Leave the change in place unverified, and verify it at the start of the next approved window.
d) Work past 03:00, since the change is already applied.

05. An engineer observes that terminals in an NR network move into a state in which they exchange no data, yet the network keeps their context and keeps the connection toward the core network in place. From that state a terminal returns to data transfer faster than one starting from idle.
Which RRC state is described?
a) RRC_INACTIVE
b) RRC_CONNECTED
c) RRC_IDLE
d) RRC_SUSPENDED

06. A three-sector site has one baseband unit in the equipment cabinet and three tower-mounted radio units, each fed by its own optical fronthaul fiber and its own DC power cable from the cabinet. During installation checks an engineer records the following.
- Two radio units are detected by the baseband unit and report normally.
- The third radio unit is not detected at all.
- At the tower end of the third unit's power cable the DC voltage reads zero, while at the cabinet end the same measurement reads the site's normal supply voltage.
Which part of the installation do these observations implicate?
a) The optical fronthaul fiber serving the third radio unit, and its connectors
b) The DC power cable run to the third radio unit
c) The site's incoming power feed, and the protection devices on it
d) The baseband unit's fronthaul interface

07. One cell of a new site is measured from a point beside the tower, where received power and quality are both excellent. The site is not yet carrying traffic. Downlink throughput comfortably exceeds the operator's criterion. Uplink throughput reaches less than a tenth of the uplink criterion on every repeat, at the same point, with the test device transmitting normally on the other two cells.
What do these observations implicate?
a) A coverage shortfall on that cell, which the uplink runs into and the downlink does not
b) Insufficient transmit power at the device, which the other two cells compensate for
c) A fault in that cell's receive path, between its antenna and its baseband processing
d) Congestion on that cell, with the uplink resources already taken by other users

08. A manufacturer is planning services on a new 5G site. Robot arms on the production line exchange short control messages with a local controller, and a message that arrives late, or not at all, stops the line. A separate inspection camera at the same site streams high-definition video to a reviewer in another building.
Which usage scenario family names the binding requirement for the robot control traffic?
a) eMBB, since the control traffic shares the site with a high-definition video stream
b) mMTC, since the production line runs a large number of separate robot arms
c) eMBB, since the control messages and the inspection video both have to be carried on one carrier
d) URLLC, since each control message has to arrive within a bounded time at very high reliability

09. A verification plan for a new NR cell calls for one defined measurement quantity that reports the received power of the cell's reference signal by itself, with interference and noise left out of the figure.
Which measurement quantity is defined that way?
a) RSRP
b) RSRQ
c) SINR
d) RSSI

10. A rooftop sector is serving terminals far past its intended cell edge and is overlapping two sectors of a site several kilometers away along the same street. The azimuth has been checked against the design and is correct, the antenna is at its design height, and the panel is the one the design specifies.
Which adjustment should be made to pull the sector's coverage back toward the site?
a) Rotate the antenna several degrees in azimuth, away from the line of the street
b) Add further downtilt to the sector antenna
c) Fit a panel antenna with a wider horizontal beamwidth for the sector
d) Raise the antenna so its main beam clears the rooftops along the street