Input/ Output Operations

Which of these is used to perform all input & output operations in Java?

• streams

• Variables

• classes

• Methods

Which of these is a type of stream in Java?

• Integer stream

• Short stream

• Byte stream

• Long stream

Which of these classes are used by Byte streams for input and output operation?

• InputStream

• InputOutputStream

• Reader

• All of the mentioned

Which of these classes are used by character streams for input and output operations?

• InputStream

• Writer

• ReadStream

• InputOutputStream

Which of these class is used to read from byte array?

• InputStream

• BufferedInputStream

• ArrayInputStream

• ByteArrayInputStream

What will be the output of the following Java program if input given is ‘abcqfghqbcd’?

class Input_Output

{

public static void main(String args[]) throws IOException {

char c;

BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));

do {

c = (char) obj.read();

System.out.print(c);

}

while(c != 'q');

} }

• abcqfgh

• abc

• abcq

• abcqfghq

What will be the output of the following Java program if input given is “abc’def/’egh”?

class Input_Output {

public static void main(String args[]) throws IOException {

char c;

BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));

do {

c = (char) obj.read();

System.out.print(c);

}

while(c!='\'');

}

}

• abc’

• abcdef/’

• abc’def/’egh

• abcqfghq

The …………………… package contains a large number of stream classes that provide capabilities for processing all types of data.

• java.awt

• java.io

• java.util

• java.net

What is the output of this program?

class output

{

public static void main(String args[])

{

StringBuffer c = new StringBuffer("Hello");

System.out.println(c.length());

}

}

• 4

• 5

• 6

• 7

Which exception is thrown by read() method?

• IOException

• InterruptedException

• SystemException

• SystemInputException