Top 50 Networking Interview Questions
The most frequently asked Networking questions across all roles and companies, ranked by real interview frequency. Updated daily.
Detect whether a directed router graph contains a cycle using DFS with three-state visitation tracking.
Cisco Restaurant + Bar
CiscoFind the second-largest distinct string using case-insensitive lexicographic ordering while preserving the first spelling encountered.
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Aggregate IPv4 and IPv6 endpoint usage, NAT dependency, connection success, and latency to compare operational tradeoffs.
Palo Alto NetworksAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
Total Wine & More
Inc.
Benjamin MooreReturn active, non-expired dataset grants while enforcing MFA and role requirements for sensitive data.
Tests ownership during high-stakes network troubleshooting, including root-cause isolation, customer communication, and outcome accountability.
QualcommTests conflict resolution and influence without authority in a technical networking disagreement with clear ownership and outcome.
Accenture
Telus DigitalTests ownership and communication under ambiguity by asking for a real example of explaining a DNS incident end-to-end and driving action.
Palantir technologies
GoogleTests ownership and influence in driving secure Kubernetes networking changes across teams under ambiguity.
UKG
Micro1Explain a distributed training stack that uses GPUDirect RDMA to reduce communication overhead and improve multi node training throughput.
Together Ai
NVIDIA