In back-to-back testing of a transmission control module, the model uses a fixed-step solver, while the generated code runs on a real-time target with a different step size. Outputs differ slightly. What is the most appropriate action?

Define a tolerance that accounts for the solver and step size differences

Run the tests only on the model

Treat any difference as a failure

Use the same solver and step size in the code

In back-to-back testing of a hybrid vehicle controller, the model uses a continuous-time representation, while the generated code uses discrete-time with a fixed step. The outputs differ slightly. The team has set a tolerance of 0.001, but the difference is 0.002. What should the team do?

Change the model to use discrete-time

Ignore the difference because it is due to discretization

Increase the tolerance to 0.003 to account for the discretization

Investigate the cause of the difference before adjusting tolerance

What is the first step in the back-to-back testing process?

Define a set of test cases that will be run on both the model and the code.

Compare the outputs of the model and the code.

Execute the test cases on the generated code.

Set up the test environment for the model simulation.

Certified Tester Automotive Software Tester

Domain 4Objective 3

Back-to-Back-Testing CT-AUT Practice Questions (Page 1)

Part of the Automotive-specific static and dynamic test techniques domain, which makes up ~20% of our current practice bank. ISTQB does not publish an official question count, but from its 60-minute exam (~25–40 total, ~5–8 in this domain), expect 1–1 from this objective — we provide 18 practice questions to prepare you well beyond it. (estimate)

18questions here

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5concepts

Questions 1–5

1application · medium
In back-to-back testing of a transmission control module, the model uses a fixed-step solver, while the generated code runs on a real-time target with a different step size. Outputs differ slightly. What is the most appropriate action?
Select an answer first
2expert · hard
In back-to-back testing of a hybrid vehicle controller, the model uses a continuous-time representation, while the generated code uses discrete-time with a fixed step. The outputs differ slightly. The team has set a tolerance of 0.001, but the difference is 0.002. What should the team do?
Select an answer first
3application · easy
A project manager wants to introduce a technique that verifies that the generated code is a faithful implementation of the simulation model. Which technique should they choose?
Select an answer first
4foundation · easy
What is the first step in the back-to-back testing process?
Select an answer first
5application · easy
A company is developing software for an airbag control unit. They want to ensure that the generated code behaves exactly like the validated model before integration testing. Which test technique should they apply?
Select an answer first

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Back-to-Back-Testing CT-AUT Practice Questions (Page 1)

Questions 1–5

In back-to-back testing of a transmission control module, the model uses a fixed-step solver, while the generated code runs on a real-time target with a different step size. Outputs differ slightly. What is the most appropriate action?

In back-to-back testing of a hybrid vehicle controller, the model uses a continuous-time representation, while the generated code uses discrete-time with a fixed step. The outputs differ slightly. The team has set a tolerance of 0.001, but the difference is 0.002. What should the team do?

A project manager wants to introduce a technique that verifies that the generated code is a faithful implementation of the simulation model. Which technique should they choose?

What is the first step in the back-to-back testing process?

A company is developing software for an airbag control unit. They want to ensure that the generated code behaves exactly like the validated model before integration testing. Which test technique should they apply?

Keep studying — Automotive-specific static and dynamic test techniques