Boundary Value Analysis vs Equivalence Partitioning: Solved Questions

Overview

This guide covers Equivalence Partitioning (EP) and Boundary Value Analysis (BVA) through worked interview problems. It details techniques for modeling input domains, identifying valid and invalid partitions, and determining boundary values for integer ranges, exclusive limits, decimal currency fields, string lengths, and multi-tier pricing bands. The material applies the ISTQB convention to establish 2-value and 3-value boundary test sets while removing duplicate inputs. The notes help software testers and interview candidates explain test data choices, boundary transitions, and expected outcomes systematically. Readers examine specific defects targeted by edge checks and practice justifying partition models and coverage objectives during technical QA interviews.

Table of contents

1. EP vs BVA: understand the difference
2. Q01 - Solve the range with EP
3. Q02 - Solve the same range with 2-value BVA
4. Q03 - Why 3-value BVA gives eight here
5. Q04 - Exclusive limits change the answer
6. Q05 - Money: the step is one paisa
7. Q06 - Username length has a domain edge
8. Q07 - Pricing bands create more partitions

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EP vs BVA: understand the difference

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• QA Engineers
• Software Testers

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