Given:
Which is true?
A. System.out is the standard output stream. The stream is open only when System.out is called.
B. System.in cannot reassign the other stream.
C. System.out is an instance of java.io.OutputStream by default.
D. System.in is the standard input stream. The stream is already open.
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D
java.lang.System public static final java.io.InputStream in
The “standard” input stream. This stream is already open and ready to supply input data. Typically this stream corresponds to keyboard input or another input source specified by the host environment or user.