CTFL_Syll_4.0 Exam Dumps : ISTQB Certified Tester Foundation Level (CTFL) v4.0

To determine the number of partitions using one-dimensional equivalence partitioning, we need to consider each aspect of the ID requirement individually.

Length of the ID:

Valid partitions: 5 to 10 characters (1 partition)

Invalid partitions: Less than 5 characters, more than 10 characters (2 partitions)

Type of characters:

Valid partitions: Alphanumeric characters (1 partition)

Invalid partitions: Non-alphanumeric characters (1 partition)

Type of first character:

Valid partitions: First character is a letter (1 partition)

Invalid partitions: First character is not a letter (1 partition)

Adding these together, we have a total of 1 (valid length) + 2 (invalid lengths) + 1 (valid type) + 1 (invalid type) + 1 (valid first character) + 1 (invalid first character) = 7 partitions.

Test-Driven Development (TDD) includes refactoring as a key practice. After writing tests and the code to satisfy those tests, refactoring is performed to improve the code and test quality without changing the functionality. This continuous process helps maintain clean, efficient, and manageable code.

The test pyramid is a concept that illustrates the different levels of testing and their relative quantities. The pyramid suggests that there should be more low-level unit tests than high-level end-to-end tests. As you move up the pyramid, the scope of each test increases, meaning each higher level test typically covers more of the production code.

Unit Tests:Form the base of the pyramid and cover individual units of code. They are numerous because they are quick to write and execute.

Service/Integration Tests:Sit in the middle of the pyramid and cover interactions between integrated units or services.

UI/End-to-End Tests:At the top of the pyramid, these tests cover entire workflows and user interactions, making them fewer in number due to their complexity and execution time.

Option B accurately describes that the higher the layer of the test pyramid, the more production code a single automated test tends to cover because these higher-level tests involve broader functionalities and interactions compared to unit tests.