Specifies the overwrite mode during extraction, to overwrite files already present on disk.
-ao[a | s | t | u ]
| Switch | Description | 
|---|---|
| -aoa | Overwrite All existing files without prompt. | 
| -aos | Skip extracting of existing files. | 
| -aou | aUto rename extracting file (for example, name.txt will be renamed to name_1.txt). | 
| -aot | auto rename existing file (for example, name.txt will be renamed to name_1.txt). | 
7z x test.zip -aoa
extracts all files from test.zip archive and overwrites existing files without any prompt.
e (Extract), x (Extract with full paths)
Switches: -y (assume Yes on all queries),