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Depth-First Search - Graph Algorithms Certification

Master Depth-First Search, a fundamental way to explore a graph. Build the adjacency lookup, write an iterative DFS in your language of choice, analyze its O(V + E) complexity, and use it to count and measure connected components.

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9 lessonsBeginner → IntermediateFree forever

Inside this course

Each chapter is a hands-on milestone toward the final certificate. Browse the full syllabus to see every lesson.

01
Introduction2 lessons
02
The Algorithm5 lessons
03
Final Challenges2 lessons
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How it works

Three steps from your first line of code to a certificate you can show off.

  1. 01

    Pick a course

    Choose any course and start with the first lesson - no card, no signup wall.

  2. 02

    Code through the section

    Each section is a series of hands-on lessons and challenges where you write real code that runs in your browser.

  3. 03

    Earn & share your certificate

    Finish the section to unlock a verifiable certificate with a unique ID. Add it to LinkedIn, your CV, or your portfolio in one click.

Other course certifications you might like

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Topological Sort - Graph AlgorithmsMaster Topological Sort, the ordering of a directed acyclic graph so every edge points forward. Compute in-degrees, build an order with Kahn's algorithm in your language of choice, detect cycles, and find the longest path in a DAG.Breadth-First Search - Graph AlgorithmsMaster Breadth-First Search, the layer-by-layer graph traversal behind shortest paths. Build the neighbor lookup, write an iterative BFS with a queue in your language of choice, and use it to find shortest-path distances in unweighted graphs.Graphs - Data Structures Series #9In this course, you will learn about the Graph data structure, create an undirected graph from zero in your preferred language, and practice coding challenges with it!Dijkstra's Algorithm - Graph AlgorithmsMaster Dijkstra's Algorithm, the greedy single-source shortest-path method for graphs with non-negative weights. Read weighted edges, build the full distance computation in your language of choice, and answer point-to-point and farthest-vertex queries.Kruskal's Algorithm - Graph AlgorithmsMaster Kruskal's Algorithm for Minimum Spanning Trees. Build union-find, grow an MST by adding the cheapest cycle-free edge in your language of choice, and answer connectivity and bottleneck-edge queries.

Frequently asked questions

How to obtain a Coddy certification?
Pick any journey on Coddy and complete a section - that is, finish every lesson and challenge inside it. As soon as you do, your certificate is generated automatically and added to your account.
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Every certificate has a unique ID and a public URL. Anyone - including recruiters and employers - can paste the ID into the verification tool on this page, or open the URL directly, to confirm the certificate is genuine and see the details.
Can it be showcased on LinkedIn or an other platform?
Of course, it's easy! You are provided with a URL link, PDF format and a certification ID, you can share any of those to showcase your active certification.
How long does it take to earn one certificate?
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Can I earn multiple certificates?
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