Question at position 18 Why is testing critical in system development?To reduce the cost of late-stage changesTo replace user trainingTo prevent the use of agile methodsTo speed up hardware developmentClear my selection

Question

BlackTom AI · Accepted Answer

Testing finds defects early in the lifecycle, which reduces the need for expensive rework later. Key concepts: the purpose of testing (detecting defects and verifying requirements), the “cost of change” principle (fixing defects becomes increasingly expensive the later they are found), and common testing levels (unit, integration, system, acceptance) that progressively catch different kinds of problems.

Step-by-step reasoning:
1. During requirements and design phases, defects are cheaper to correct because changes affect smaller, well-contained artifacts (documents, diagrams). During coding and integration more work is needed to rework code, retest, and update documentation. After release, fixes also require deployment, possible data migration, and user support.
2. Empirical models (widely cited in software engineering) show costs can grow multiplicatively; for example, assume a defect costs $1 to fix at requirements, $10 during integration, and $100 after release. If testing shifts defect discovery from post-release to integration or earlier, savings are substantial.
3. Testing practices (automated unit tests, continuous integration tests, system and acceptance testing) move defect detection earlier, thereby reducing aggregated cost: fewer regression fixes, less emergency patching, reduced user-impact and support costs.

Why the correct answer is correct:
- “To reduce the cost of late-stage changes” directly ties to testing’s ability to detect problems earlier when they are cheaper to resolve. That is the primary driver for systematic testing in system development.

Why other options are incorrect:
- “To replace user training”: Testing does not replace training; training addresses human behavior and usage, while testing validates the system’s correctness.
- “To prevent the use of agile methods”: Testing is compatible with and essential in agile; it does not prevent agile.
- “To speed up hardware development”: Testing of software/system components may reveal issues but is not primarily a means to speed hardware development; hardware timelines and manufacturing constraints are separate.

Conclusion: The correct choice is “To reduce the cost of late-stage changes,” which matches the provided answer.

Question at position 18 Why is testing critical in system development?To reduce the cost of late-stage changesTo replace user trainingTo prevent the use of agile methodsTo speed up hardware developmentClear my selection单项选择题

类似问题

Testing involves

A function you have just made accepts only a single float or int as a input and performs a calculation. Which of the following set of test inputs, where each number is tested individually, is most likely to give you useful testing results?

Question at position 13 Why is virtualisation useful for testing software?It eliminates the need for developersIt allows apps to run directly on hardwareIt reduces software complexityIt ensures users can test without risk to the host systemClear my selection

Which of the following statements is correct?

Question at position 20 What is a key advantage of the V-Model in testing?It focuses only on GUI testingIt eliminates the need for documentationIt supports only waterfall methodsIt aligns testing activities with corresponding development stagesClear my selection

Question at position 19 Why is testing critical in system development?To prevent the use of agile methodsTo speed up hardware developmentTo replace user trainingTo reduce the cost of late-stage changesClear my selection

Question at position 18 What does testing involve in software development?Only validating visual design elementsOnly testing at final deployment stageEnsuring the system works at every stageTracking project budgetsClear my selection

Question at position 12 Which statement is TRUE about testing and quality?Good testing always guarantees project successTesting can help deliver quality but cannot guarantee successQuality does not depend on testingPoor test management rarely affects system qualityClear my selection

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单