Chapter 3 – Static Testing
Call Graph – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A representation of the calling relationships between subroutines in a program.
In simple words
A diagram showing which functions call which other functions.
Exam tip
Call graphs come from static analysis and help scope regression testing after a change.
Related terms
- Static AnalysisTools scan source code, models or documents to find defects without running the software.
- Impact AnalysisBefore making a change, work out what else it will touch so you can plan tests and effort.
- White-Box TestingYou design tests using knowledge of the code — branches, statements, paths — to hit specific structural coverage targets.
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