Test Design and Coverage Fundamentals Questions

Understand core test design techniques and how to achieve appropriate coverage across a feature. Explain positive tests for the happy path, negative tests for invalid or malicious inputs, and boundary and edge case tests for extremes and corner conditions. Discuss test case design heuristics such as equivalence partitioning and boundary value analysis, test data selection, how to prioritize tests by risk and frequency, and how coverage targets map to different layers of the testing pyramid.