Testing

• Why is testing important in systems development?

  To ensure the system is of high quality
• What are the quality indicators used during testing?

  • Functionality
  • Performance
  • Reliability
  • Usability
  • Security
• How should software testing be viewed?

  As an ongoing activity throughout development
• What is unit testing?

  Testing individual software units separately
• What happens after individual units are tested?

  They are integrated and tested together
• Why might individual units not integrate seamlessly?

  Because they may have different data expectations
• What are the key steps in the testing process?

  1. Unit testing
  2. Integration testing
  3. System testing
  4. Alpha testing
  5. Beta testing
  6. Acceptance testing
• What is the purpose of unit testing?

  To check individual parts of software
• What does black box testing involve?

  Testing functionality without source code access
• How would you conduct a black box test on a billing module?

  By entering electricity units and checking bills
• What is white box testing?

  Testing with access to internal code structures
• How would you perform a white box test on a billing module?

  By checking all calculation pathways in the code
• What is integration testing?

  Testing combined software units as a system
• What does system testing ensure?

  That the system meets user requirements
• What is alpha testing?

  In-house testing by the development team
• What is beta testing?

  Testing by potential users in real environments
• What is acceptance testing?

  Final test before software handover
• What is the purpose of a test plan?

  To document testing procedures and expectations
• What categories of test data should be included in a test plan?

  1. Normal Data
  2. Extreme Data
  3. Exceptional Data
• What is normal/valid data?

  Data that the program will accept
• What is extreme/boundary data?

  Data at the limits of acceptability
• What is exceptional/invalid data?

  Data that should not be accepted by the program
• What is the significance of using test data in software testing?

  • Confirms expected behavior with valid data
  • Tests system response to extreme values
  • Validates handling of invalid data