Which of these methods are used to read in from file?

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Which of these methods are used to read in from file?

1. scan()
2. get()
3. readFileInput()
4. read()
5. None of these

Correct Option: D

Each time read() is called, it reads a single byte from the file and returns the byte as an integer value. read() returns -1 when the end of the file is encountered.