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In the following typical exam questions are given Question 1 (+3 for a correct answer; -1 for a wrong answer minimal points: 0)

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CS411 Software Architecture Design

Short explanation

Exams for CS411 consists of a part which is aimed to assess your theoretical knowledge on software architecture design, and a part which is aimed to assess the engineering design. The exam is open book, and as such, most of the questions are focused on applying the concepts to design architectures. In the following typical exam questions are given.

Question 1

(+3 for a correct answer; -1 for a wrong answer. minimal points: 0) The following provides statements related to the concept of software architecture. For each statement indicate whether it is true or false and motivate this with two-three sentences at the most. a) Textual requirements provide the right source for deriving the architectural abstractions for an architecture. b) UML as-is provides suitable notations to represent architectures. c) Software architecture description languages are programming languages. d)

Window Manager Systems

A window management system is a type of interactive user interface that enables users to work with multiple separate applications at the same time. This is achieved through the use of a desktop metaphor in which each process is associated with a graphical window. A window management system provides the functionality to create and manipulate the display of multiple processes. A window management system includes different important components such as (a) input manager for I/O controlling, (b) process manager for managing application processes, (c) screen manager for maintaining the integrity of the screen and (d) window manager for managing the windows that are related to the application processes.

Question 2.

a. Draw the global picture of the window management system architecture using entity- relation diagrams, object diagrams or feature-oriented modeling. Name the relations and explain the architecture briefly. b. After an initial domain analysis of current window management systems it appears that the domain of window management systems is too large so that domain scoping is necessary. Assume that a use-case based approach is going to be utilized. What are the problems of applying (only) use-case analysis in scoping the domain? Motivate your answer by using the above example. c. Assume that a reuse-driven approach is applied and one attempts to derive a complete domain model for window management systems. What are the risks of such an approach? Motivate your answer again using the above example. d. Define 10 problems (concerns) that can help in identifying the solution domains for defining the architecture for window management systems. e. Assume that the window management system architecture will be implemented on two different operating systems: (1) a command-based operating system without multi-tasking (e.g. DOS), and (b) a windows-based multi-tasking operating system (e.g. Windows

2000). What would be the impact of these operating systems on the four components of

the window management architecture? Refer to the architecture diagram for this purpose.

Question 3.

After a feasibility analysis it is decided to focus on the window manager component of the architecture. Consider the following table in which a set of knowledge sources has been collected to extract the concepts for defining the software architecture for window managers: a. Expert on user interface design b. Existing window management systems (x11, windows, VMS, OSF/Motif etc) c. Textbook on designing window management systems d. PhD thesis on process management in operating systems e. Textbook: Operating System Design f. a. Evaluate the relevancy of each knowledge source for deriving the architectural concepts of window managers. b. Give two additional knowledge sources that may be relevant.

Question 4.

Several important concepts can be extracted from the knowledge sources. Window Manager performs operations on windows to allow the user to use the screen space effectively. Window Manager supports, for example operations such as creating, destroying, moving, resizing, iconifying, and refreshing a window. Window defines the logical display that is connected to at least one Application Process. Process Manager ties applications to windows for I/O and other operations. The windows are displayed on Screen. Each window is associated to one

Icon and has cursor picture for Pointer.

a. Design the architecture for window manager using the above general description. b. Provide for an architectural component at least three alternative instances.quotesdbs_dbs2.pdfusesText_2