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What are the types of defects in software testing?

gopal@91ninjas.com gopal@91ninjas.com | Last updated: January 22, 2025 |

In software testing, defects are categorized based on their nature, impact, and the area they affect. Below are the main types of defects in software testing:

  1. Functional Defects: Occur when a feature or functionality doesn’t work as specified in the requirements.
  • Example: A login button doesn’t redirect to the dashboard as intended.
  1. Performance Defects: Related to the system’s speed, responsiveness, or resource usage.
  • Example: A web page takes too long to load or an application crashes under heavy load.
  1. UI/UX Defects: Affect the user interface and experience, making the product less intuitive or visually appealing.
  • Example: Misaligned buttons, unreadable fonts, or poor navigation flow.
  1. Security Defects: Related to vulnerabilities that could compromise data integrity, confidentiality, or user security.
  • Example: Weak password validation or exposure of sensitive data.
  1. Compatibility Defects: Occur when the application doesn’t work consistently across different devices, browsers, or operating systems.
  • Example: A website looks fine in Chrome but breaks in Safari.
  1. Logical Defects: Arise from incorrect implementation of business logic or calculations.
  • Example: A discount is applied incorrectly in a shopping cart.
  1. Integration Defects: Occur when different modules or systems fail to interact correctly.
  • Example: Data is not passed correctly between the frontend and backend.
  1. Data Defects: Involve incorrect, missing, or corrupted data that affects application functionality.
  • Example: An incorrect currency format in financial reports.
  1. Boundary/Edge Case Defects: Related to errors that occur when inputs approach or exceed defined limits.
  • Example: A field accepting 256 characters when the limit is 255.
  1. Localization/Internationalization Defects: Occur in multi-language applications when content or functionality isn’t adapted correctly for different regions.
  • Example: Incorrect date formats or untranslated text.
  1. Concurrency Defects: Happen in applications with multiple users or threads, where simultaneous actions cause issues.
  • Example: Two users editing the same record cause a data overwrite.
  1. Missing Requirements Defects: Arise when a feature specified in the requirements is not implemented.
  • Example: A mandatory search filter is absent in the application.
  1. Configuration Defects: Occur due to incorrect application settings or environment configurations.
  • Example: An application fails in production due to a missing API key.

How does QA Touch help manage defects in software testing?

QA Touch simplifies defect management by offering an intuitive bug tracking tool that helps teams log, categorize, prioritize, and track defects throughout the testing lifecycle. Its features include custom workflows, real-time reporting, and audit logs to monitor defect resolution. Easy integration with tools such as Jira and Slack ensures efficient collaboration, while attachments (audio, screenshots, and videos) enhance issue documentation. These capabilities ensure defects are managed systematically, improving team productivity and software quality.