The complete 5G RF interview prep program. 15 progressively harder test modules covering NR fundamentals, link budgets, beam mgmt, RACH, mobility, KPI analysis, troubleshooting, drive-test logs, and modem conformance — plus dedicated tracks for Qualcomm · Intel · MediaTek · Apple · Samsung · Ericsson · Nokia · Huawei.
Each module focuses on one mastery area. Difficulty scales progressively. Click any test to begin.
Architecture · NSA vs SA · FR1/FR2 · numerology · subcarrier spacing · BWP · TDD/FDD · frame structure · physical channels
RSRP · RSRQ · SINR · RSSI · path loss · link budget · noise floor · MIMO · beamforming · EIRP · CQI/RI/PMI
SS/PBCH block · SSB beam sweeping · CSI-RS · PRACH · PDCCH/PDSCH · PUCCH/PUSCH · DMRS · PTRS · HARQ
4-step PRACH · MsgA/MsgB 2-step RACH · preamble groups · PRACH config index · contention resolution · failures
Intra/inter-frequency HO · inter-RAT · LTE↔NR · A1-A5 / B1-B2 events · CHO · BFR · RLF · re-establishment
SSB beams · CSI-RS for beam refinement · BFR · QCL Type-A/D · TCI states · panel switching
MCS · CQI · RI · BLER · PRB · TBS · MIMO rank · scheduling · HARQ · LA · OLLA
RRC SR · PDU SR · IA SR · HO SR · drop · TP · latency · PRB Util · BLER · CQI · MCS · rank distribution
Low RSRP · poor SINR · low TP · high BLER · drops · HO failures · RACH failures · BFR · UL/DL interference · PCI collisions
Real DT log RCA · TEMS · Nemo · XCAL · QXDM/QCAT · KPI plots · mobility maps · interference hunts
RRC · NGAP · NAS · PDU session est · EN-DC SgNB add · EPS fallback · re-direction · SCG failure
UE capability · attach (NSA/SA) · RRC states · CA · NR-DC · VoNR · EPS-FB · RedCap · power · throughput · conformance
Modem deep-dive · NSA/SA registration · RRC/NAS · QXDM/QCAT log analysis · CA · MIMO · RACH/mobility failures
RAN optimization · vendor counters · KPI breakdowns · parameter tuning · NetAct/PRS/MML
Full 1-hour interview simulation · 4 rounds · Fundamentals → Scenarios → Deep RCA → Behavioral · final hire/no-hire report
Each company asks differently. Pick yours and we'll tailor the question style, expected rounds, and grading rubric.
Your end-of-test report places you on this 5-tier scale with weak-area diagnosis and a study plan.