What are the different Workflow modes ? What are they ?

There are 4 types of Workflow Modes:-

They are:-

Service Flow

Interactive Flow

Long running Flow

7.0 Flow

Service Flow

Is the default mode for a new workflow.An important point to note here is that cannot include wait or Use Interact Step

Interactive Flow

Is used to Navigate users through a set of View

Long Running Flow

Is a workflow that can run for hours , days or months.Cannot include a wait step.Can be Paused and resumed as an inbox item

7.0 Flows

Should not be used for new workflows.Provided for backward compatability  of workflows defined prior to Siebel 7.5 Release