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software testing and quality assurance

Questions and Answers of Software Testing And Quality Assurance

=+Does a high volume of interrupts arriving at critical times create prob-lems in function or performance?
=+What data rates and data volume can the system tolerate?
=+How are the boundaries of a data class isolated?
=+21.10. Consider two safety-critical systems that are controlled by computer. List at least
=+21.9. The MTBF concept for software is open to criticism. Explain why.
=+ware that imply quality? What are they and can they be measured directly?
=+21.8. Besides counting errors and defects, are there other countable characteristics of soft-
=+What is the first thing that you should do? What's next?
=+20.10 Considering all of the review guidelines presented in Section 20.6.3, which do you think is most important and why?
=+What do you do if you're the review leader?
=+20.9 A formal technical review is effective only if everyone has prepared in advance. How do you recognize a review participant who has not prepared?
=+20.8 Can you think of a few instances in which a desk check might create problems rather than provide benefits?
=+20.7 Which of the reference model characteristics do you think has the strongest bearing on review formality? Explain why.
=+20.6 Describe the meaning of Figure 20.4 in your own words.
=+20.5 Reconsider the situation described in Problems 20.3 and 20.4. If each of the errors re-leased to the field costs $4,800 to find and correct and each error found in review costs $240 to find
=+20.4 Reconsider the situation described in Problem 20.3, but now assume that require-ments, design, and code reviews are conducted and are 60 percent effective in uncovering all errors at that
=+Assume further that all unit testing will find 30 percent of all errors, integration will find 30 percent of the remaining errors, and validation tests will find 50 percent of the remaining errors.
=+error will be amplified by a factor of 2:1 into design and an addition 20 design errors are introduced and then amplified 1.5:1 into code where an additional 30 errors are introduced.
=+20.3 Assume that 10 errors have been introduced in the requirements model and that each
=+three hazards for each that can be directly linked to software failures.
=+21.11. Acquire a copy of ISO 9001:2000 and ISO 9000-3. Prepare a presentation that dis-
=+cusses three ISO 9001 requirements and how they apply in a software context.
=+Is the system particularly sensitive to certain input values?
=+What classes of input will make good test cases?
=+How are system behavior and performance tested?
=+How is functional validity tested?
=+hard knocks! Begin with an outline of topics that will be reviewed by the class and your instructor. Publish the guide for others in your local environment.
=+22.10 As a class project, develop a Debugging Guide for your installation. The guide should provide language and system-oriented hints that you have learned through the school of
=+22.9 Develop a complete test strategy for the SafeHome system discussed earlier in this book. Document it in a Test Specification.
=+22.8 Who should perform the validation test-the software developer or the software user?Justify your answer.
=+22.7 Is unit testing possible or even desirable in all circumstances? Provide examples to justify your answer.
=+22.6 How can project scheduling affect integration testing?
=+22.5 The concept of "antibugging" (Section 22.2.1) is an extremely effective way to provide built-in debugging assistance when an error is uncovered:a. Develop a set of guidelines for
=+22.4 Why is a highly coupled module difficult to unit test?
=+ What possible complications might arise for embedded systems?
=+22.3 Is it always possible to develop a strategy for testing software that uses the sequence of testing steps described in Section 22.1.3?
=+22.2 List some problems that might be associated with the creation of an independent test group. Are an ITG and an SQA group made up of the same people?
=+22.1 Using your own words, describe the difference between verification and validation. Do both make use of test-case design methods and testing strategies?
=+20.2 Why can't we just wait until testing to find and correct all software errors?
=+What effect will specific combinations of data have on system operation?
=+16.7. Find five patterns repositories and present an abbreviated description of the types of patterns contained in each.
=+16.8. When Christopher Alexander says "good design cannot be achieved simply by adding together performing parts," what do you think he means?
=+16.9. Using the pattern-based design tasks noted in Section 16.2.3, develop a skeletal design
=+for the "interior design system" described in Section 15.3.2.
=+16.10. Build a pattern-organizing table for the patterns you used in Problem 16.9.
=+16.11. Using the design pattern template presented in Section 16.1.3, develop a complete pattern description for the Kitchen pattern mentioned in Section 16.3.
=+16.12. The gang of four [Gam95] have proposed a variety of component patterns that are applicable to object-oriented systems. Select one (these are available on the Web) and dis-Cussit.
=+16.13. Find three patterns repositories for user-interface patterns. Select one pattern from each and present an abbreviated description of it.
=+21.6. Why is there often tension between a software engineering group and an independent software quality assurance group? Is this healthy?
=+16.14. Find three patterns repositories for WebApp patterns. Select one pattem from each and present an abbreviated description of it.
=+16.15. Find three patterns repositories for mobile patterns. Select one pattern from each and present an abbreviated description of it.
=+Can content and/or function and/or navigation options be tailored to the user's preferences?
=+begin by addressing the context, the system of forces, and the broad problems that a coach and team must solve. You need only specify pattern names and provide a one-sentence description for each
=+16.6. Develop a skeletal pattern language for a sport with which you are familiar. You can
=+16.5. Using the design pattern template presented in Section 16.1.3, develop a complete pattern description for a pattern suggested by your instructor.
=+17.8. Reconsidering the FutureLearning "learning engine" described in Problem 17.4, select a content architecture that would be appropriate for the WebApp. Discuss why you made the choice.
=+21.1. Some people say that "variation control is the heart of quality control. " Since every program that is created is different from every other program,
=+ what are the variations that we look for and how do we control them?
=+21.2. Is it possible to assess the quality of software if the customer keeps changing what it is supposed to do?
=+21.3. Quality and reliability are related concepts but are fundamentally different in a num-ber of ways. Discuss the differences.
=+21.4. Can a program be correct and still not be reliable? Explain.
=+21.5. Can a program be correct and still not exhibit good quality? Explain.
=+16.1. Discuss the three "parts" of a design pattern and provide a concrete example of each from some field other than software.
=+16.2. What is the difference between a nongenerative and a generative pattern?
=+16.3. How do architectural patterns differ from component patterns?
=+16.4. What is a framework and how does it differ from a pattern?
=+What is an idiom and how does it differ from a pattern?
=+Can content and/or functionality be customized to the bandwidth at which the user communicates?
=+Can content and/or function and/or navigation options be made context aware according to the user's preferences?
=+deliver course content to a student. The learning engine provides the basic infrastructure for delivering learning content on any subject (content designers will prepare appropriate content).
=+17.5. What is the most aesthetically pleasing website you have ever visited and why?
=+17.6. Consider the content object Order, generated once a user of SafeHomeAssured.com has completed the selection ofall components and is ready to finalize his purchase. Develop a UML description
=+17.7. What is the difference between content architecture and WebApp architecture?
=+21.7. You have been given the responsibility for improving the quality of software across your organization.
=+17.9. Use UML to develop three or four design representations for content objects that would be encountered while the "learning engine" described in Problem 17.4 is designed.
=+17.10. Do a bit of additional research on the MVC architecture and decide whether it would be an appropriate WebApparchitecture for the "learning engine" discussed in Problem 17.4.
=+17.11. What is the difference between navigation syntax and navigation semantics?
=+17.12. Define two or three NSUS for the SafeHomeAssured.com WebApp. Describe each in some detail.
=+Can content and/or function and/or navigation options be tailored to the user's preferences?
=+Can content and/or functionality be customized to the bandwidth at which the user communicates?
=+Does the app account for weak or lost signals in an acceptable manner?
=+17.4. You are a WebApp designer for FutureLearning Corporation, a distance learning com-pany. You intend to implement an Internet-based "learning engine" that will enable you to
=+17.3. Add at least five additional questions to the WebApp Design-Quality Checklist pre-sented in Section 17.1.
=+three that you believe are most important, and make an argument that explains why each should be emphasized in WebApp design work.
=+Have graphics and other nontext media been used appropriately?
=+Are graphics file sizes optimized for display efficiency?
=+Are tables organized and sized in a manner that
=+makes them understandable and displayed efficiently?
=+Is HTML optimized to eliminate inefficiencies?
=+Is the overall page design easy to read and navigate?
=+Do all pointers provide links to information that is of interest to users?
=+Is it likely that most links have persistence on the Web?
=+Is the WebApp instrumented with site management
=+utilities that include tools for usage tracking, link testing, local searching, and security?
=+17.1. Why is the "artistic ideal" an insufficient design philosophy when modern WebApps are built?
=+ Is there ever a case in which the artistic ideal is the philosophy to follow?
=+17.2. In this chapter we select a broad array of quality attributes for WebApps. Select the
What are the guidelines that should be followed when using colour in a user interface?Suggest how colour might be used more effectively in the interface of an application system that you use.
You have developed a throw-away prototype system for a client who is very happy with it.However, she suggests that there is no need to develop another system but that you should deliver the
What are the major technical and nontechnical factors that hinder software reuse? Do you reuse much software, and if not, why?

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