The software architect is typically responsible for the following quality characteristics:A. The performance of the software - Ensuring that the software meets performance criteria and behaves efficiently under specified conditions is a primary responsibility of the software architect.C. The suitability of the software design for its purpose - Architects must ensure that the design effectively meets the intended functions and requirements, addressing the suitability of the software for its purpose.
These answers are derived from established software architecture practices and principles, focusing on the roles and responsibilities of software architects in ensuring quality and effective documentation.

When designing external interfaces, several considerations must be taken into account:A. Volatility of neighbouring systems - Changes in neighboring systems can affect the stability and compatibility of interfaces, requiring interfaces to be adaptable to changes.C. Protocols enforced by neighbouring systems - It's crucial to align with the protocols used by neighboring systems to ensure seamless communication and interoperability.D. Expected amount of parallel calls - This affects the scalability and performance requirements of the interface, as it must be designed to handle the expected load efficiently.

Explanation:
A) FalseB) TrueC) True
In a system with a multitude of class dependencies, the following measures can be considered:
A) The dependencies between classes are the responsibility of the developers. No measures are required within the architecture: This is false. While developers do manage day-to-day class dependencies, architectural measures are necessary to address systemic issues in a mature system1.
B) Loosening of direct dependencies between classes through the introduction of interfaces: This is true.
Introducing interfaces can decouple classes and allow for more flexible and maintainable code1.
C) Loosening of direct dependencies between classes through the introduction of factories: This is also true.
Factories can provide a way to create instances of classes without specifying the exact class, thus reducing dependencies1.
These measures align with the iSAQB SOFTWARE ARCHITECTURE - FOUNDATION LEVEL guidelines, which suggest that managing dependencies is crucial for maintaining and extending systems effectively1.

In the context of software architecture, the common definitions often focus on the structural aspects of system design. Here's how the chosen answers align with the iSAQB guidelines on software architecture:
* Building Blocks (B): A fundamental concept in software architecture, building blocks refer to the modular units from which the system is constructed. These can include modules, classes, or components, all of which are vital for defining the structure and behavior of the system.
* Relationships (D): Relationships in software architecture define how different components or building blocks interact with each other. These interactions are essential for understanding data flow, dependencies, and communication patterns within the system.
* Components (E): Components are larger than building blocks and encompass them, representing significant units of functionality within the system. Each component usually encapsulates a portion of the system's overall functionality and interacts with other components via interfaces.
* Interfaces (G): Interfaces define the points of interaction between components or building blocks. They are critical for ensuring that components can function independently yet interact seamlessly when required.

Explanation:
The aspects that are more of a domain-related nature and those that are more of a technical nature are as follows:
* More technical:
* Choosing a database (A)
* Choosing a layout manager in a GUI (D)
* The average number of methods per class (E)
* More domain-related:
* Modelling a banking account (B)
* Legal constraints for the execution of a money transfer
* Specification of a calculation formula (F)
In software architecture, aspects can be categorized based on their relevance to the domain (the problem space) or the technology (the solution space). Here's an explanation of each:
* More Technical:
* Choosing a database (A): This is a technical decision based on factors like data volume, concurrency, performance, and technology stack.
* Choosing a layout manager in a GUI (D): This involves technical considerations about how user interface elements are arranged and managed on the screen.
* The average number of methods per class (E): This is a technical metric used in object-oriented design to assess complexity and maintainability.
* More Domain-Related:
* Modelling a banking account (B): This involves understanding the business rules and operations of banking accounts, which is domain-specific knowledge.
* Legal constraints for the execution of a money transfer : These are domain-related as they pertain to the legal and regulatory requirements of financial transactions.
* Specification of a calculation formula (F): This is typically domain-related because it involves the business logic and rules for performing calculations within the domain.
These distinctions are important for architects to consider when making design decisions, ensuring that both technical and domain-related aspects are adequately addressed.
References:
* Rozanski, N., & Woods, E. (2011). Software Systems Architecture: Working With Stakeholders Using Viewpoints and Perspectives. Addison-Wesley Professional.
* Fowler, M. (2002). Patterns of Enterprise Application Architecture. Addison-Wesley.