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Back to ISTQB CTFL
ISTQB Certified Tester Foundation Level (CTFL) Study Notes
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Fundamentals
Lifecycle
Static Testing
Techniques
Management
Tools
Core Testing Principles
Remember
CTFL is scenario-driven. Understand why testing is done, not just definitions.
Term
Meaning
Error
Human action that produces an incorrect result
Defect
Imperfection in a work product
Failure
Observed incorrect behavior during execution
Testing
Evaluation of work products to detect defects and reduce risk
Testing shows presence of defects, not their absence.
Exhaustive testing is impossible in most real systems.
Early testing reduces downstream defect cost.
Defects cluster in specific components (defect clustering).
