Top 50

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Updated weekly · Last refresh Nov 2

Top 50 Networking Interview Questions

The most frequently asked Networking questions across all roles and companies, ranked by real interview frequency. Updated daily.

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CodingStart here. 16 questions · ~234 min

Implement Directed Graph Cycle DetectionHard

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Recently asked

Detect whether a directed router graph contains a cycle using DFS with three-state visitation tracking.

Networkingdfscycle detection

Cisco Restaurant + Bar

Cisco

Networking Basics for SoftwareMedium

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Implement IPv4 longest prefix matching with bitwise masks to select the most specific route.

Bit ManipulationNetworkingbasics

Palo Alto Networks

Networking and Linux QuizMedium

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Score networking and Linux quiz answers while grouping missed questions by topic using hash maps.

CodingNetworkingArrays

NVIDIA

Linux, Networking, and Coding QuestionsMedium

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Sort IPv4 ranges and merge overlapping intervals in O(n log n) time.

CodingNetworkingArrays

NVIDIA

Linux, Networking, Python BasicsMedium

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Evaluate coverage of Linux, networking, and class concepts using sets and ordered missing-topic detection.

bashCodingclean code

NVIDIA

App With Networking and Local StorageHard

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Design a deterministic sync algorithm that reconciles API records with pending local changes and produces storage and upload actions.

api integrationdata synchronizationdata persistence

Robinhood

Networking Design and CodingHard

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Find the next hop for an IPv4 address using longest-prefix matching across CIDR routes.

CodingNetworkingdesign

Cloudflare

Second Largest StringMedium

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Find the second-largest distinct string using case-insensitive lexicographic ordering while preserving the first spelling encountered.

NetworkingArraysstring manipulation

F5 Networks

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SQL & Data Manipulation5 questions · ~73 min

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Technical Fundamentals4 questions · ~59 min

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Behavioral & Leadership4 questions · ~59 min

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Security & Infrastructure20 questions · ~293 min

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