Which of the following functions can be used to read data from a file using a file descriptor?Select one:os.reader()os.scan()os.read()os.quick_read()

To determine which function can be used to read data from a file using a file descriptor, we need to look at the functions provided:

1. os.reader(): This function does not exist in the standard os module for reading from file descriptors.

2. os.scan(): This function is not intended for reading data from files or file descriptors in the standard os module.

3. os.read(): This function is specifically designed to read data from a file descriptor. It takes a file descriptor and the number of bytes to read as arguments.

4. os.quick_read(): This function does not exist in the standard os module for reading from file descriptors.

Conclusion

The correct answer is os.read(). This function is used to read data from a file using a file descriptor effectively.