Verification, Validation, and Inspections

Software Verification Definition

1 pts

volume_mute

Which of the following best defines software verification?

Reviewing the project schedule and budget against original estimates

Checking that the software meets its stated functional and non-functional requirements

Ensuring the software meets the customer's expectations beyond its written specification

Executing the software with real user data to find runtime errors

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Software Validation Goes Beyond Verification

1 pts

volume_mute

How does software validation differ from verification?

Validation ensures the software meets customer expectations, going beyond conformance to specification

Validation is a subset of verification and focuses only on functional requirements

Validation is performed only by the development team; verification is done by the customer

Validation checks conformance to specification; verification ensures customer expectations are met

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Inspections and Testing in the Software Process

1 pts

volume_mute

The diagram below shows where inspections and testing support V&V across different stages of the software process.

Based on this model, which artifacts can be subject to software inspections?

Only artifacts produced after coding begins

Requirements specifications, design models, database schemas, and program source code

Only the final program source code

Only UML design models and database schemas

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Nature of Inspections as a V&V Technique

1 pts

volume_mute

Software inspections are described as 'static' V&V techniques. What does this mean?

They only examine the static structure of data, not program logic

They produce unchanging reports that cannot be updated

They do not require executing the software to verify it

They are performed at a fixed point in time, once per project

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Advantages of Inspections Over Testing

1 pts

volume_mute

Software inspections have three stated advantages over testing. Which of the following are among those advantages? Select all that apply.

Errors cannot mask other errors during inspection because the system is not executed

Incomplete versions of a system can be inspected without additional cost

Inspections can consider broader quality attributes such as portability and maintainability

Inspections can detect inefficiencies, inappropriate algorithms, and poor programming style

Inspections are always faster than testing for large systems

Inspections eliminate the need for a test plan

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Error Masking in Testing

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volume_mute

A testing team discovers unexpected output in the middle of a long test run. They are unsure whether later anomalies are caused by a new error or are side effects of the first error found. Which inspection advantage does this scenario illustrate?

During testing, errors can mask other errors, but inspection avoids this problem

Inspections are cheaper per defect found than testing

Inspections check broader quality attributes

Inspections can review incomplete systems

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Effectiveness of Program Inspections

1 pts

volume_mute

Research and industry studies have reported on the defect-detection effectiveness of program inspections. Which of the following findings are supported by research cited in the literature? Select all that apply.

The Cleanroom process claims more than 90% of defects can be discovered through inspections

Inspections can replace software testing entirely in all project types

Inspections guarantee 100% defect detection when conducted formally

Inspections have been shown to be more effective for defect discovery than program testing

Fagan reported that more than 60% of errors can be detected using informal program inspections

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Limitations of Inspections

1 pts

volume_mute

Despite their effectiveness, inspections cannot replace software testing. Which types of defects are inspections NOT well suited to discover? Select all that apply.

Timing problems in concurrent or real-time systems

Problems with system performance

Spelling errors and typos in variable names

Defects arising from unexpected interactions between different parts of a program

Violations of coding standards

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Practical Challenges with Inspections

1 pts

volume_mute

In small companies or small development groups, what is a practical challenge that makes formal inspections difficult to conduct?

Small teams produce too little code to justify the overhead of formal inspections

Small teams lack access to version control tools needed for inspections

It is difficult and expensive to form a separate inspection team when all potential members are also developers

Regulatory frameworks prohibit small teams from conducting inspections without certification

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Classify V&V Activities

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Classify each of the following activities as either a static V&V technique (Inspection) or a dynamic V&V technique (Testing).

drag and drop the selected option to the right place

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When V&V Checking Processes Begin

1 pts

volume_mute

At what point in the software development process do verification and validation checking processes begin?

Only when the system is ready for release to customers

Only after all code has been written and compiled

As soon as requirements become available, continuing through all stages of development

During the testing phase, which comes after design and implementation

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Software Verification Definition

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Explanation

Software Validation Goes Beyond Verification

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Inspections and Testing in the Software Process

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Nature of Inspections as a V&V Technique

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Explanation

Advantages of Inspections Over Testing

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Error Masking in Testing

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Effectiveness of Program Inspections

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Limitations of Inspections

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Practical Challenges with Inspections

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Classify V&V Activities

drag and drop the selected option to the right place

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Explanation

When V&V Checking Processes Begin

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Explanation

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