Final answer:
In Windows Command Prompt, Ctrl + Z is used as the EOF indicator to signal the end of input data for text streams.
Step-by-step explanation:
The Windows key sequence for typing the end-of-file (EOF) indicator in the Command Prompt window is Ctrl + Z. To signal EOF, which is used to denote the end of input data for text streams, you would press Ctrl + Z and then hit the Enter key. This is a common practice when using command-line interfaces on Windows operating systems to indicate to the system that there is no more data to be read.