ISQI ISAQB Certified Professional for Software Architecture - Foundation Level - CPSA-FL Exam Practice Test
Concerning external interfaces, Postel's law suggests: "Be conservative in what you do, be liberal in what you accept from others." Assume that Postel's law has been consistently applied in your system. (Assign all answers.)
Correct Answer:
Explanation:
A) FalseB) FalseC) FalseD) TrueE) TrueF) False
Postel's law, also known as the robustness principle, is a guideline in software engineering that advises to "be conservative in what you do, be liberal in what you accept from others"1. This principle has implications for system design and interaction with external interfaces:
A) Response time of the system is reduced: This is false. Postel's law does not directly relate to the response time of a system1.
B) Implementation effort increases: This is false. Being liberal in what is accepted can actually simplify implementation because the system is designed to handle a wider range of inputs without failure1.
C) Usability of the system is reduced: This is false. Postel's law aims to increase robustness and interoperability, which can enhance usability by making the system more resilient and accommodating1.
D) Robustness of the system is increased: This is true. By being conservative in outputs and liberal in inputs, the system becomes more robust, handling a variety of inputs without error1.
E) The integrity of the data transferred via interfaces is increased: This is true. Accepting a wide range of inputs and adhering strictly to output specifications helps maintain data integrity across different systems1.
F) Availability of the system is reduced due to potentially bad quality of input data: This is false. Postel's law suggests that the system should be designed to handle poor quality input data gracefully, thus maintaining availability1.
Applying Postel's law helps create systems that are more tolerant of input variations and strict in their outputs, contributing to overall system robustness and reliability1.
Which of the following statements about (crosscutting) concepts are most appropriate? (Select four.)
Correct Answer: A,D,F,G
Vote an answer
Explanation: Only visible for Fast2test members. You can sign-up / login (it's free).
Which statements regarding top-down and bottom-up design are true? (Assign all answers.)
Correct Answer:
Explanation:
A) TrueB) TrueC) FalseD) TrueE) TrueF) True
A) Top-down and bottom-up design may be employed in the same project.
* Top-down and bottom-up are two approaches to the design of software architecture. In top-down, the high-level design is created first, focusing on general functionalities and structure. In contrast, bottom-up starts with detailed designs focusing on a component or module level.
Which four of the following items can be building blocks of a software architecture? (Choose four.)
Correct Answer: B,E,F,H
Vote an answer
Explanation: Only visible for Fast2test members. You can sign-up / login (it's free).