Certified Associate in Software Testing (CAST) Practice Test

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What does equivalence partitioning help with when generating test cases?

Testing in parallel
Reducing the number of tests
Validating code structure
Enhancing system performance

The correct answer is: Reducing the number of tests

Equivalence partitioning is a testing technique that helps in reducing the number of test cases that need to be executed while still maintaining effective coverage of the input specifications. By dividing input data into valid and invalid partitions, testers can select representative values from each partition rather than testing every possible input. For instance, if an input field for age accepts values from 1 to 100, equivalence partitioning allows the tester to group all inputs less than 1, between 1 and 100, and greater than 100 into distinct categories. This means that the tester can pick just one test case from each group, effectively minimizing the number of cases while still ensuring that all scenarios are considered. This approach not only saves time and effort but also improves efficiency in the testing process, making it easier to identify potential defects without having to check every single value. Thus, the primary benefit of equivalence partitioning is indeed the reduction of the number of tests while ensuring comprehensive coverage.