Arrange the standard software testing levels in sequential order, from verifying individual code components to final user validation.

### Why this is right Testing commonly proceeds from individual units to combined modules, then to the system as a whole, and finally to acceptance by the customer or user. The source material places coding and unit testing before integration and system testing, and lists acceptance testing with the latter stage. ### The order 1. **Unit testing**: Check an individual unit after coding. 2. **Integration testing**: Check interactions among combined modules. 3. **System testing**: Test the integrated system. 4. **Acceptance testing**: Assess whether the delivered system is acceptable to the customer. ### Terms - **Integration**: Combining software modules so their interactions can be tested. - **Acceptance testing**: Testing used to assess whether a system meets customer acceptance needs. ### Remember Testing generally grows in scope, from a unit to the complete system and acceptance.