Java MCQ Questions - Java.io

This section focuses on the "Java.io" of Java programming. These Multiple Choice Questions (MCQ) should be practiced to improve the Java programming skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations.

1. Java I/O is used to process the?

A. input 
B. output
C. Both A and B
D. None of the above

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2. Can we perform file handling in Java by Java I/O API?

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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3. In java, how many streams are created for us automatically?

A. 2
B. 3
C. 4
D. 5

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4. Which method is used to write a byte to the current output stream?

A. public void write(int)throws IOException
B. public void write(byte[])throws IOException
C. public void flush()throws IOException
D. public void close()throws IOException

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5. Which method is used to write an array of byte to the current output stream?

A. public void write(int)throws IOException
B. public void write(byte[])throws IOException
C. public void flush()throws IOException
D. public void close()throws IOException

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6. Which of these class is not a member class of java.io package?

A. File
B. StringReader
C. Writer
D. String

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7. ObjectFilter is a member of java.io package.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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8. ___________ returns true if called on a file and returns false when called on a directory.

A. IsFile()
B. Isfile()
C. isFile()
D. isfile()

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9. What will be output for the following code?

    import java.io.*;
    class files 
    {
        public static void main(String args[]) 
        {
            File obj = new File(""/java/system"");
            System.out.print(obj.getName());
        }
    }

A. java
B. system
C. java/system
D. /java/system

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10. What will be output for the following code? Note: file is made in c drive

import java.io.*;
    class files 
    {
        public static void main(String args[]) 
        {
            File obj = new File(""/java/system"");
            System.out.print(obj.canWrite());
            System.out.print("" "" + obj.canRead());
        }
    }

A. true false
B. false true
C. true true
D. false false

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