Input Output -Java Programming MCQ Questions and Answers

1

Which class is used to read data from the keyboard in Java?

A) Scanner B) FileReader C) BufferedReader D) InputStream

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Answer & Solution

Answer: Option A

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2

What is the purpose of the `System.out.println()` method in Java?

A) It performs mathematical operations B) It writes data to a file C) It reads data from the keyboard D) It prints data to the standard output stream followed by a newline

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Answer & Solution

Answer: Option D

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3

Which method is used to write data to a file in Java?

A) read() B) print() C) write() D) scan()

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Answer & Solution

Answer: Option C

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4

How can you close a file after reading or writing in Java?

A) By using the `terminate()` method B) By using the `close()` method of the file stream C) By using the `readLine()` method D) By using the `exit()` method

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Answer & Solution

Answer: Option B

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5

What is the purpose of the `FileInputStream` class in Java?

A) It is used to perform mathematical operations B) It is used to write data to a file C) It is used to read data from a file D) It is used to read data from the keyboard

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Answer & Solution

Answer: Option C

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6

Which class is used to read data from a file in Java?

A) Scanner B) BufferedWriter C) OutputStream D) FileReader

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Answer & Solution

Answer: Option D

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7

What is the purpose of the `BufferedReader` class in Java?

A) It is used to read data from a file efficiently B) It is used to read data from the keyboard C) It is used to write data to a file D) It is used to perform mathematical operations

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Answer & Solution

Answer: Option A

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8

Which method is used to read a line of text from the keyboard in Java?

A) `nextLine()` B) `printLine()` C) `writeLine()` D) `readLine()`

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Answer & Solution

Answer: Option D

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9

In Java, what does the `FileOutputStream` class do?

A) It is used to read data from a file B) It is used to read data from the keyboard C) It is used to write data to a file D) It is used to create directories

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Answer & Solution

Answer: Option C

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10

What is the purpose of the `PrintWriter` class in Java?

A) It is used to read binary data from a file B) It is used to write formatted text to a file C) It is used to read text from the keyboard D) It is used to read & write binary data from a file

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Answer & Solution

Answer: Option B

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