Core Java - Interview Questions and Answers for 'System.in' | Search Interview Question

Core Java - Interview Questions and Answers for 'System.in' - 3 question(s) found - Order By Newest

Q1. What is System.in in Java ?

Core Java

Ans. It is an InputSream which is usually connected to the keyboard input of console program.

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Q2. What is the difference between System.out ,System.err and System.in?

Ans. System.out and System.err both represent the monitor by default and hence can be used to send data or results to the monitor. But System.out is used to display normal messages and results whereas System.err is used to display error messages and System.in represents InputStream object, which by default represents standard input device, i.e., keyboard.

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Q3. Write code explaining use of Scanner class ?

Ans. Scanner sc = new Scanner(System.in);
int i = sc.nextInt();

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