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Which of these packages contain classes and interfaces used for input & output operations of a program?

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Which of these packages contain classes and interfaces used for input & output operations of a program?

(a) java.util

(b) java.lang

(c) java.io

(d) all of the mentioned

This question was posed to me during an interview.

I need to ask this question from Java.io Introduction topic in portion Exploring java.lang & java.io of Java

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Best answer
The correct option is (c) java.io

To explain I would say: java.io provides support for input and output operations.

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