According to ISTQB syllabus, systems of systems;
I . Contain interconnected hardware, software applications and communications.
II . Include big bang merging of independent collaborating systems to avoid creating the entire system from scratch.
III . Can be less reliable than individual systems
IV . Characteristics include; long duration of projects, version management and regression tests at systems of systems level.
A car manufacturer is updating its airbag deployment system for its family cars. It has increased the number of airbags from four to nine. This has necessitated an upgrade to the airbag control software (ACS) to allow deployment of the extra airbags where appropriate. The car manufacturer receives information from on-board sensors. From this, it calculates the amount of deployment needed (minimal, medium and full), and from which airbag(s). For this upgrade, it will receive information from extra sensors to be used in its calculations. The car manufacturer employs its own in-house software development team. It uses the V model for its software development. There are four stages of testing, from unit through to factory acceptance testing. The development team is made up of project, programming and test managers. The programmers use object-oriented methods for development. The car manufacturer wishes to be first to market with the extra airbags, which will allow it to increase the safety ratings for its family cars, thereby increasing sales in a very competitive market. Which of the following is a product risk of the upgrade described?
Which of the following statements are correct?
I . A failure can be detected only by dynamic testing technique.
II . Defects can exist in test environment.
III . All incidents require a software change.
IV . Code and design reviews can reveal defects
Select the correct state transition diagram for the following train door open/close scenario. When the train is moving, the train doors are closed. After train stops at a station, doors will be opened by the operator, passengers take off and new passengers board the train. Doors will be opened for 40 seconds at the train station. Train doors will be closed when the train is not in service.
