Newly Released ISTQB CTAL-TTA Exam PDF

To achieve 100% decision coverage, you must ensure every decision in the code has been evaluated both to true and false. Given the code:

If x > y and z = 3 statement1 elseif z = 4 statement2 endif;

Two tests are required:

• Test 1: Set x > y true and z = 3 to evaluate the first decision as true and execute statement1.
• Test 2: Set z = 4 (ensuring the first condition x > y and z = 3 evaluates to false) to evaluate the elseif condition as true and execute statement2.

This testing ensures that both branches of the decision have been evaluated.

The control flow graph provided illustrates the decision points for an airline's upgrade and boarding process. Decision coverage is a measure of the percentage of decision points executed during testing:

• Test 1 covers the decision points: Gold card? (Yes) and Business full? (No).
• Test 2 covers: Gold card? (No) and Economy full? (No).
• Test 3 covers the decision that leads to being bumped from the flight, which is Economy full? (Yes) and Business full? (Yes).

From the given tests, the decision points for Gold card? (No) and Business full? (No) are not tested, leaving us with 4 out of 6 decision points covered, which is approximately 67% decision coverage.

The correct option for addressing the issue of increasing test run times in a Continuous Integration (CI) environment is option C: reducing the extent to which automated tests go through the user interface, and selecting a subset of automated tests for the daytime CI runs while running many of the other tests in an overnight cycle.

• Reducing User Interface Tests: By reducing the extent of tests that go through the user interface (UI) and using technical interfaces instead, you can significantly decrease the time each test takes. UI tests are generally slower due to rendering and user interaction simulations.
• Optimizing Test Scheduling: By selecting only a subset of tests for daytime CI runs and scheduling extensive testing for overnight runs, the team can manage the test load better without compromising the frequency of integration, thus ensuring continuous testing does not become a bottleneck.

This dual approach effectively manages both the execution time of individual tests and the overall test process across the development cycle, maintaining the agility of the CI process without sacrificing the breadth of testing necessary for quality assurance .

The mnemonic FIRST is used to describe qualities of good unit tests in software development. Here, each letter stands for a critical attribute:

• Fast: Tests should be quick to run.
• Isolated: Tests should not depend on each other.
• Reliable: Tests should consistently return the same results.
• Self-Verifying: Tests should fully check their own results.
• Timely: Tests should be written in a timely manner relative to the writing of the tested code. This mnemonic helps ensure that unit tests are effective and contribute positively to the development process .