Final answer:
The key sequence to access position register data depends on the programming language and platform being used. In Python, the tell() function can be used to get the current position of the file pointer in a file.
Step-by-step explanation:
In computer programming, the key sequence to access position register data depends on the programming language and platform being used. However, in many programming languages, the position register data can be accessed using the appropriate function or method provided by the programming language.
For example, in Python, the tell() function is used to get the current position of the file pointer in a file. In C++, the tellg() function can be used to get the current position in an input stream, while the tellp() function can be used to get the current position in an output stream.
It's important to consult the official documentation or programming language references for the specific function or method to access position register data in the programming language you are using.