A topological sort is a linear ordering of vertices in a directed acyclic graph (DAG). … A topological sort of a DAG provides an appropriate ordering of gates for simulations. The simple algorithm in Algorithm 4.6 topologically sorts a DAG by use of the depth-first search.

Why do we use topological sort?

Topological Sorting is mainly used for scheduling jobs from the given dependencies among jobs.

Why we use topological sort over DFS?

Topological sort simply involves running DFS on an entire graph and adding each node to the global ordering of nodes, but only after all of a node’s children are visited. This ensures that parent nodes will be ordered before their child nodes, and honors the forward direction of edges in the ordering.