ATA: ISTQB Advanced Level Test Analyst

By ISTQB · Question Mode

QuestionQ47

Test Analysis and Test Design

A diamond retailer is deploying a new stocktaking system. Every diamond is assigned a character representing its colour. The character’s valid domain is D through Z. The colour is graded according to the following scale:

Question Image

Which of the following test sets provides the best equivalence-partitioning coverage?

Explanation

Equivalence partitioning requires a representative from each set of inputs expected to be handled alike. The colour ranges form five valid partitions: D–F, G–J, K–M, N–R, and S–Z; values below D and above Z are invalid domain partitions. The set A, E, H, L, P, T, § covers all five valid partitions and both invalid ranges. The ISTQB syllabus specifies that equivalence partitions include valid and invalid values, and complete coverage requires all identified partitions.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!