EPISODE · Apr 13, 2026 · 14 MIN
A-Level Computer Science – Depth-First & Breadth-First Search Explained (OCR / AQA) | S12:Ep5
from Ultimate A-Level Computer Science Podcast · host Teacher of Computing - AHC
This episode provides an overview of graph traversal algorithms, specifically depth-first search (DFS) and breadth-first search (BFS). It explains how to trace and describe typical applications for each algorithm, including illustrations of their operational steps using a sample graph. The text further details the data structures employed by each algorithm—a stack for DFS and a queue for BFS—and examines their complexity. Finally, it briefly discusses the application of these concepts to tree traversals, highlighting similarities and differences.
What this episode covers
This episode provides an overview of graph traversal algorithms, specifically depth-first search (DFS) and breadth-first search (BFS). It explains how to trace and describe typical applications for each algorithm, including illustrations of their operational steps using a sample graph. The text further details the data structures employed by each algorithm—a stack for DFS and a queue for BFS—and examines their complexity. Finally, it briefly discusses the application of these concepts to tree traversals, highlighting similarities and differences.
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A-Level Computer Science – Depth-First & Breadth-First Search Explained (OCR / AQA) | S12:Ep5
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