Software Testing - Exercises

Known Defects at Delivery and Product Support

1 pts

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A software company is about to ship a product. The development manager states: 'We still have 47 known defects in the system, but they are all low-severity. We will fix them in a patch.' How does the number of known defects remaining in a program at delivery affect product support costs and operations?

Known defects reduce support costs because they are already documented and easy to fix

Known defects only affect support costs if they are high-severity; low-severity defects have no impact

More known defects at delivery lead to higher post-release support costs, more customer complaints, and increased pressure on the support team

Known defects have no impact on support because users can work around them

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Why Testers May Not Know What a Program is Intended to Do

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Testing is meant to show that a program does what it is intended to do. However, testers may not always know what a program is intended to do. Which of the following are reasons why this knowledge gap can occur? Select all that apply.

Testers may lack access to the requirements documents because they are confidential

Testers may be assigned to test software in application domains they are unfamiliar with

The intended behavior may have evolved informally during development without updating the specification

Requirements specifications may be incomplete, ambiguous, or contradictory

Testers are not trusted with business logic details by management

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Developer Testing - Arguments For

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Some argue developers should test their own code rather than handing it to a separate testing team. Which of the following are valid arguments in favor of developers testing their own code? Select all that apply.

Developers can fix defects immediately as they are discovered during testing

Developer testing is cheaper because it does not require a dedicated testing team

Developers have the deepest knowledge of the code, enabling them to design targeted tests quickly

Integrating testing into development encourages a test-as-you-code mindset

Developers are more motivated to find defects in their own code than an external team

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Developer Testing - Arguments Against

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What is the strongest argument against developers being solely responsible for testing their own code?

Developers do not have enough time to also test their code

Regulatory standards always require a separate testing team for all software

Developers lack the tools required for systematic testing

Developers have a vested interest in showing their code works and may unconsciously design tests that avoid revealing defects

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Partition Testing for catWhiteSpace

1 pts

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A method called catWhiteSpace is part of a 'Paragraph' object. Within a paragraph, it replaces sequences of blank characters with a single blank character. For example, 'Hello World' becomes 'Hello World'. Which of the following correctly identifies the input partitions for testing this method? Select all that apply.

A sequence with a single blank character between words

A paragraph where blanks appear only at the end

A paragraph where blanks appear only at the beginning

An empty paragraph with no content

A paragraph consisting only of blank characters

A sequence with two or more consecutive blank characters

A sequence with no blank characters (all other characters)

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Regression Testing and Automated Frameworks

1 pts

Complete the explanation of how automated testing frameworks simplify regression testing: "Regression testing involves re-running (1) tests after changes have been made. Automated frameworks like JUnit allow all tests to be encoded in a (2) that can be run every time a change is made. This makes regression testing (3) and reduces the risk of missing important tests."

Please drag and drop the selected option in the right place or type it instead

practical

manual

program

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Testing Off-the-Shelf Systems vs. Custom OO Systems

1 pts

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A hospital acquires a patient records system by adapting an existing off-the-shelf information system. How does testing an adapted off-the-shelf system differ from testing software developed from scratch using an object-oriented language?

Off-the-shelf systems cannot be tested because the source code is not available

Off-the-shelf systems always pass all acceptance tests because they are already proven products

Testing focuses more on integration and configuration rather than individual component defects, since the core components were previously tested in other contexts

Off-the-shelf systems require more unit testing because all code is new

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Designing a Scenario for Weather Station Testing

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You need to design a scenario for testing a wilderness weather station system. The system collects meteorological data, summarizes it, and reports to a remote mapping system. Which of the following would be characteristics of a well-designed test scenario for this system? Select all that apply.

The scenario should be easy for stakeholders to recognize as realistic and important

The scenario includes both normal operation and at least one error or boundary condition

The scenario is complex enough to test multiple system features in one narrative

The scenario tests only a single isolated method in the system

The scenario follows a realistic sequence of events that reflects how the system is actually used

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Stress Testing the Mentcare System

1 pts

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The Mentcare system is a mental health patient records system. Suggest how you might stress test the Mentcare system. Which of the following would constitute an appropriate stress testing approach for this system?

Running the system with a single user entering records slowly over several hours

Testing the system with the minimum number of records to check basic functionality

Examining the source code structure for inefficient algorithms that could cause performance problems

Generating a large volume of simultaneous prescription requests, patient record accesses, and allergy warning triggers far exceeding normal daily transaction volumes

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Benefits of Early User Involvement in Release Testing

1 pts

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Involving users at an early stage in release testing has several benefits. Which of the following are genuine benefits of early user involvement in release testing? Select all that apply.

Users provide information about practice that helps design more realistic tests

Users identify problems not readily apparent to the development team

Early involvement reduces the risk of costly last-minute changes discovered only at acceptance

User involvement guarantees the system will pass all acceptance tests

Users can detect issues arising from their real working environment

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Ethics of Prioritizing System Test Coverage

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A system testing approach tests the most important functionalities first, followed by less important ones, until the testing budget is exhausted - leaving some functionality untested. A debate arises: who decides what is 'more important'? Which of the following ethical issues does this approach raise? Select all that apply.

Prioritizing by business impact may leave safety-critical functions with lower commercial value undertested

The definition of 'important' may reflect business priorities rather than user safety or equity

Budget constraints may lead to deploying software with known untested areas that could harm users

The approach transfers the risk of untested functionality entirely onto the testing team

Functions used by minority or vulnerable user groups may be classified as 'less important' and left untested

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Known Defects at Delivery and Product Support

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Why Testers May Not Know What a Program is Intended to Do

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Developer Testing - Arguments For

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Developer Testing - Arguments Against

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Partition Testing for catWhiteSpace

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Regression Testing and Automated Frameworks

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Testing Off-the-Shelf Systems vs. Custom OO Systems

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Designing a Scenario for Weather Station Testing

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Stress Testing the Mentcare System

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Benefits of Early User Involvement in Release Testing

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Ethics of Prioritizing System Test Coverage

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Explanation

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