Library › Book 11 › Test Design Techniques

Test Design Techniques

AI API SQL Playwright Security Performance Mobile Accessibility CI/CD Git Linux Agile Strategy Career

2.1🔒OverviewYou cannot test every possible input. These techniques answer: "Which inputs should I choose?" They have been taught since the 1970s and…36 words

2.2🔒Boundary Value Analysis (BVA)Test at the edges of input ranges, where bugs cluster. Off-by-one errors are the most common numerical bug in software.380 words

2.3🔒Equivalence Partitioning (EP)Divide inputs into groups (partitions) where all values behave the same. Test one representative from each partition.246 words

2.4🔒Decision TablesWhen business logic involves combinations of conditions, decision tables ensure complete coverage.349 words

2.5🔒State Transition DiagramsFor features with distinct states and transitions between them.313 words

2.6🔒Pairwise TestingWhen you have many parameters, testing all combinations is impractical. Pairwise ensures every pair of parameter values appears at least…177 words

2.7🔒Choosing the Right TechniquePro Tip: In practice, experienced QA engineers combine techniques. For one feature you might use EP to identify partitions, BVA to pick…100 words

2.8🔒Key Takeaways — Chapter 2- BVA catches off-by-one errors at range boundaries - EP reduces test count by grouping equivalent inputs - Decision tables ensure complete…55 words

2.9🔒Q&ASelf-Assessment Quiz — Chapter 21. For a text field that accepts 1-50 characters, list the six BVA values you would test. 2. What are the three equivalence partitions for…111 words

2.10🔒Exercises — Chapter 2Beginner: Apply BVA to a password field (minimum 8 characters, maximum 64 characters, must contain at least one digit). List all boundary…110 words

2.11🔒Q&AResume phrasing- Applied boundary value analysis and equivalence partitioning to reduce test suite size by 60% while maintaining equivalent defect…75 words

2.12🔒Q&ACover letter framingI select test design techniques strategically based on the problem at hand — boundary value analysis for numeric fields, decision tables…62 words

2.13🔒Q&AInterview framing"I approach test design by first classifying the problem: Is this a range validation? I use BVA and EP. Is it a set of business rules?…84 words

2.14🔒Q&AWhat not to say- "I just test everything I can think of" — suggests no systematic technique selection - "Boundary values are just min and max" — misses…93 words

2.15🔒Q&AQuestion 1Prompt: A registration form has these fields: age (18-120), username (3-20 alphanumeric characters), and a country dropdown (200…216 words

2.16🔒Q&AQuestion 2Prompt: You are testing a pricing engine with these rules: employees get 30% off, orders over $500 get free shipping, loyalty members get…183 words

2.17🔒Q&AQuestion 3Prompt: An e-commerce order has these states: Cart, Placed, Paid, Shipped, Delivered, Returned, Cancelled. Some transitions have conditions…186 words

2.18🔒Q&AQuestion 4Prompt: Your team needs to test a web form across 4 browsers, 3 operating systems, 2 screen sizes, and 3 languages. Full combinatorial…189 words

2.19🔒Q&AQuestion 5Prompt: A colleague argues that equivalence partitioning is unnecessary because "if you test the boundaries, you cover everything." How do…218 words