Most Recent ISTQB CTAL-TTA Exam Questions & Answers

The comment frequency in a code fragment relates to the number of comments in relation to the code size. A good level of comment frequency can significantly contribute to the maintainability of the software. Maintainability is a non-functional quality characteristic that refers to the ease with which a software system can be modified to correct defects, update features, improve performance or other attributes, or adapt to a changed environment. Comments in the code help developers understand the logic, purpose, and functionality of the code, which is crucial when modifications are required. This does not directly contribute to portability, usability, or performance efficiency, which are concerned with different aspects of the software's operation and user interaction.

The statement that is true about test approaches is that in a Model-based test approach, tests can be created automatically. This is confirmed by the understanding that model-based testing involves generating test cases directly from a model that describes the system functions, behavior, or both, which supports automatic test creation.

Stress testing is the most appropriate method for identifying weak areas in code that may cause performance issues, especially under conditions of extreme load or stress. This type of testing deliberately pushes the system beyond its normal operational capacity to see how it behaves under stress, which can help reveal vulnerabilities in error recovery and transactional integrity that are not apparent under normal conditions. Stress testing can provide early insights into potential failure points and help prioritize areas for improvement before full-scale deployment.

Including security testing in a test approach is valid when there are concerns about unauthorized access or activities, such as the threat of unauthorized copying of applications or data (option A). This type of testing aims to uncover vulnerabilities that could be exploited to compromise the confidentiality, integrity, or availability of the system. The other options listed---availability measurements (option B), system's peak load handling (option C), and frequent software changes (option D)---relate to different aspects of testing, such as reliability, performance, and maintainability, which are not directly associated with security testing.

Installability testing is usually conducted during the System Testing stage of the SDLC. It typically includes testing the installation process of the software to verify that it installs correctly across various systems and configurations. This type of testing often overlaps with functionality testing to ensure all functions are available post-installation, and usability testing to ensure that the installation process is intuitive and user-friendly.