8. Data-related Bugs
Data-related bugs arise when an application handles data incorrectly, leading to errors in storage, retrieval, or processing. Here's a breakdown of common types:
1. Data Corruption
- Data gets altered or damaged, leading to incomplete or inaccurate results.
- Example: A customer profile displays garbled or missing information after being saved.
2. Data Loss
- Important data is deleted or fails to be saved properly.
- Example: A user’s progress in a game is erased after an update.
3. Data Duplication
- Duplicate records are created unintentionally, leading to redundancy and confusion.
- Example: Multiple entries for the same customer appear in a CRM system.
4. Boundary Value Errors
- Data exceeding defined limits causes incorrect behaviour or crashes.
- Example: A field designed for 100 characters fails when the input is longer.
5. Data Type Mismatch
- Incorrect data types lead to errors in processing.
- Example: A form expects numerical input but receives text, causing a crash.
6. Data Consistency Issues
- Inconsistent data across different systems or modules.
- Example: Inventory numbers don’t match between the warehouse database and the sales system.
7. Incorrect Data Formatting
- Data is not formatted properly for processing or display.
- Example: A date field uses "MM/DD/YYYY" format in a region that requires "DD/MM/YYYY."
8. Missing Data
- Essential data is absent or fails to load correctly.
- Example: An invoice system generates blank fields for customer details.
9. Incorrect Data Mapping
- Data is stored or retrieved from the wrong location.
- Example: A contact form stores email addresses under "phone number" fields.
10. Data Security Errors
- Data is exposed or stored insecurely, violating privacy requirements.
- Example: User passwords are stored in plain text instead of being encrypted.
11. Data Overflow
- Storage limits are exceeded, leading to system failures or crashes.
- Example: Logging too much data in a file causes disk space depletion.
12. Synchronization Failures
- Data updates in one system aren’t reflected in another integrated system.
- Example: Changes in user preferences on the website don’t appear in the mobile app.
13. Incorrect Default Values
- Applications use unintended or incorrect preset values during operations.
- Example: A salary field defaults to “0” for new employees instead of “Not Entered.”
14. Invalid Data Input
- Applications fail to handle unexpected or invalid data gracefully.
- Example: A form crashes when users input special characters in a name field.
Data-related bugs require careful validation, error handling, and thorough testing during the development process to ensure the reliability of data handling.