Integration Testing Overview
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Questions and Answers

What characterizes a terminal module in a hierarchical system?

  • It can be further decomposed into sub-modules.
  • It cannot be further decomposed. (correct)
  • It is the top-level module of the system.
  • It is the module that integrates all other modules.

    • Which approach begins integration with the lowest level modules?

  • Top-Down Approach
  • Big Bang Approach
  • Sandwich Approach
  • Bottom-Up Approach (correct)

    • What is a key disadvantage of the Big Bang Approach in large systems?

  • It requires extensive documentation.
  • It focuses too much on individual module testing.
  • It may lead to overwhelming interface defects. (correct)
  • It is expensive in terms of resources used.

    • In the Sandwich Approach, which two methods are combined?

    <p>Top-Down and Bottom-Up Approaches</p> Signup and view all the answers

    Which module in the described advertising company architecture handles input validation?

    <p>VAL Module</p> Signup and view all the answers

    What does the Business Logic (BL) module do in the architecture of the advertising company?

    <p>It holds all the calculations and business-specific methods.</p> Signup and view all the answers

    Why is it costly to implement the Big Bang Approach in large systems?

    <p>Many interface errors can occur, complicating failure analysis.</p> Signup and view all the answers

    What is the primary role of the Content (CNT) module in the advertising software?

    <p>To store and display static content in reports.</p> Signup and view all the answers

    What is the primary objective of integration testing?

    <p>To verify the interfaces between components</p> Signup and view all the answers

    Which of the following is a key advantage of early defect detection in integration testing?

    <p>It allows for immediate corrective actions without project delays</p> Signup and view all the answers

    Who is primarily responsible for performing integration testing?

    <p>The System Integration Group</p> Signup and view all the answers

    When is integration testing considered complete?

    <p>When all test cases have been executed and defects fixed</p> Signup and view all the answers

    What role do system architects play in integration testing?

    <p>They provide an overview of the system for complex software testing</p> Signup and view all the answers

    What type of feedback can be obtained from integration testing?

    <p>Feedback on the acceptability of individual modules and the overall system</p> Signup and view all the answers

    Which of the following statements about interfaces in integration testing is true?

    <p>They provide a means for one module to access services of another</p> Signup and view all the answers

    What is a critical aspect of effective system integration?

    <p>Incrementally putting modules together while ensuring functionality</p> Signup and view all the answers

    What is the primary objective of acceptance testing?

    <p>To measure the quality of the product against customer expectations</p> Signup and view all the answers

    Which of the following is NOT considered a system testing activity?

    <p>User acceptance testing</p> Signup and view all the answers

    Why is it important to design a balanced test suite?

    <p>To avoid skewed results due to over-testing in one area</p> Signup and view all the answers

    What type of acceptance testing is conducted to meet contractual criteria?

    <p>User acceptance testing</p> Signup and view all the answers

    How can test engineers prioritize their testing tasks effectively?

    <p>By categorizing tests based on function importance</p> Signup and view all the answers

    Which statement is true regarding stress tests in the context of system testing?

    <p>They aim to identify limitations of the system.</p> Signup and view all the answers

    What role do customers play in acceptance testing?

    <p>They perform testing based on their expectations from the product.</p> Signup and view all the answers

    Which of the following statements about business acceptance testing is correct?

    <p>It is undertaken within the supplier's development organization.</p> Signup and view all the answers

    What is the primary purpose of a test case?

    <p>To outline actions, test data, and expected responses</p> Signup and view all the answers

    Which of the following is NOT a reason for constructing test cases?

    <p>Creating marketing strategies</p> Signup and view all the answers

    What determines the number of test cases needed for a project?

    <p>The size, complexity, and type of testing</p> Signup and view all the answers

    Which of the following test cases is likely to yield an unsuccessful operation for an ATM?

    <p>Unsuccessful operation due to wrong PIN entered three times</p> Signup and view all the answers

    In testing a login web page, which scenario would produce a successful outcome?

    <p>Entering the correct username and password</p> Signup and view all the answers

    What component of a test case verifies that the application is working as expected?

    <p>Expected response for each action performed</p> Signup and view all the answers

    Which test case would likely identify a gap in the technical design of an ATM?

    <p>Unsuccessful withdrawal due to the amount being greater than the available balance</p> Signup and view all the answers

    Which of the following describes a negative scenario to consider in test case construction?

    <p>Unsuccessful operation due to wrong angle card insertion</p> Signup and view all the answers

    What is a key pre-condition for executing the test case for changing the ATM PIN?

    <p>The current PIN is known</p> Signup and view all the answers

    Which action represents the first step in the example test case for changing the ATM PIN?

    <p>Click the 'Change PIN' button</p> Signup and view all the answers

    In the provided test case example for changing the PIN, what is the expected system response after entering the new PIN?

    <p>The system displays a confirmation message</p> Signup and view all the answers

    What should be verified as a post-condition after the PIN change operation is successful?

    <p>The new PIN is saved in the database</p> Signup and view all the answers

    What is the purpose of using a test case template in testing?

    <p>To ensure consistency and clarity in test documentation</p> Signup and view all the answers

    Which of the following describes a failure condition in the context of the ATM PIN change case?

    <p>The system is unable to save the new PIN</p> Signup and view all the answers

    How should the execution date be recorded in a test case?

    <p>It should indicate the actual date the test was executed</p> Signup and view all the answers

    Which type of triangle will be identified if all three sides are of different lengths?

    <p>Scalene</p> Signup and view all the answers

    Study Notes

    Integration Testing

    • Integration testing verifies the interfaces between components of a software system.
    • Its objective is to ensure functional, performance, and reliability between integrated modules.
    • Integration testing aims to incrementally build a "working" version of the system.
    • It involves putting modules together and verifying their interactions.
    • Advantages:
      • Early defect detection
      • Easier defect fixing
      • Feedback on individual module and overall system health
      • Flexible defect fix scheduling

    Integration Testing Roles

    • System Integration Group performs integration testing.
    • Software Developers contribute to integration testing due to their knowledge of modules.
    • System Architects are involved in complex systems due to their understanding of the big picture.
    • Test engineers, analysts, project managers, and users contribute to the testing process and feedback.

    Different Types of Interfaces

    • An interface allows modules to access services provided by other modules.
    • In a hierarchical system, modules are decomposed.
    • A terminal module is one that is not further decomposed.

    Integration Testing Approaches

    • Top-Down Approach: Integration starts from the top level and integrates lower-level modules progressively.
    • Bottom-Up Approach: Integration begins with the lowest-level modules and progresses upward.
    • Sandwich Approach: Combines top-down and bottom-up approaches.
    • Big-Bang Approach: All modules are individually tested first, then integrated and tested together.
      • Not recommended for large systems due to potential interface defects and difficulty in isolating failure causes.

    Integration Testing Example

    • Example scenario involves an advertising company tracking ad views and clicks.
    • The system is divided into modules: UI (User Interface), BL (Business Logic), VAL (Validation), CNT (Content).

    System Testing

    • Activities:
      • Creating a test plan
      • Designing a test suite
      • Preparing test environments
      • Executing tests according to a strategy
      • Monitoring the test execution process

    System Testing Types

    • Different types of system testing will be explained later.

    System Testing Types Advantages

    • It allows focusing on specific aspects of the system and prioritizing tasks.
    • It enables a balanced test suite, ensuring essential functions are covered.

    Operational Acceptance Testing

    • Measures product quality rather than searching for defects.
    • Performed by customers based on their expectations.

    Acceptance Testing Categories

    • User Acceptance Testing (UAT): Conducted by the customer to ensure satisfaction of contractual acceptance criteria.
    • Business Acceptance Testing (BAT): Performed within the development organization to ensure eventual UAT success.

    Test Case

    • Contains a sequence of steps, test data, and expected response for each action.
    • Based on business requirements, functional requirements, use cases, and technical design documents.
    • Level of detail varies depending on the organization, project, template, and tool used.

    Test Case Importance

    • Helps identify issues in requirements and technical design during construction.
    • Guides testers on how to verify application functionality.
    • Number of test cases depends on system size, complexity, and type of testing.

    Test Case Examples

    • ATM System: Examples include successful card insertion, invalid pin, successful withdrawal, and different error scenarios.
    • Log-in Web Page: Examples include testing with valid and invalid credentials, long usernames, and password management.

    Source of Test Cases

    • Requirements
    • Use cases
    • Design documents

    Test Case Template

    • Test case #: Unique Identifier of test case
    • Test case name: Descriptive name of the test case
    • System: Name of the overall system being tested
    • Subsystem: The specific part of the system under test
    • Designed by: Name of the test case designer
    • Design date: The date the test case was created
    • Executed by: Name of the person who executes the test case
    • Execution date: The date when the test case is executed.
    • Short Description: Summary of what the test case is intended to verify.
    • Pre-conditions: Steps that must be completed before the test case can be run.
    • Step, Action, Expected System Response, Pass/Fail, Comment: Each step is described with an expected system response, and a pass/fail indication after execution.
    • Post-conditions: Steps that must be completed after the test case has been finished.
    • This structure can be adapted to the needs of the project, including adding specific sections such as inputs, outputs, or reference document links.

    Test Case Example

    • Example for "Change PIN" functionality in an ATM system, showcasing steps with expected outcomes.

    Class Exercise

    • Exercise prompts to write a test case for successful withdrawal operation in an ATM system, referencing the previous example.

    Program Example

    • Example program that determines the type of triangle based on side lengths.

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    Related Documents

    Unit 02 Software Testing Levels (1).pptx

    Description

    This quiz explores the fundamentals of integration testing, including its objectives, advantages, and the roles various teams play in the process. Delve into the importance of ensuring functional and reliable interactions between software components. Suitable for anyone interested in software development and testing methodologies.

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