Input Output MCQ

Test your knowledge with important Input Output MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Input Output MCQs at Bissoy

• What is the length of the application box made the following Java program?<br><pre><code class="java">import java.awt.*;import java.applet.*;public class myapplet extends Applet{ Graphic g; g.drawString("A Simple Applet", 20, 20); }</code></pre>
  ক

  20

  খ

  Default value

  গ

  Compilation Error

  ঘ

  Runtime Error
• What is the length of the application box made by the following Java program?<br><pre><code class="java">import java.awt.*;import java.applet.*;public class myapplet extends Applet{ public void paint(Graphics g) { g.drawString("A Simple Applet", 20, 20); }}</code></pre>
  ক

  20

  খ

  50

  গ

  100

  ঘ

  System dependent
• What is the Message is displayed in the applet made by the following Java program?<br><pre><code class="java">import java.awt.*;import java.applet.*;public class myapplet extends Applet{ public void paint(Graphics g) { g.drawString("A Simple Applet", 20, 20); }}</code></pre>
  ক

  A Simple Applet

  খ

  A Simple Applet 20 20

  গ

  Compilation Error

  ঘ

  Runtime Error
• Which of these class contains the methods print() &amp; println()?
  ক

  System

  খ

  System.out

  গ

  BUfferedOutputStream

  ঘ

  PrintStream
• Which of these is used to perform all input &amp; output operations in Java?
  ক

  streams

  খ

  Variables

  গ

  classes

  ঘ

  Methods
• When comparing java.io.BufferedWriter and java.io.FileWriter, which capability exist as a method in only one of two ?
  ক

  closing the stream

  খ

  flushing the stream

  গ

  writting to the stream

  ঘ

  writting a line separator to the stream

  ঙ

  None of these
• Which of these classes defined in java.io and used for file-handling are abstract?<br>A. InputStream<br>B. PrintStream<br>C. Reader<br>D. FileInputStream<br>E. FileWriter
  ক

  Only A

  খ

  Only C

  গ

  A and C

  ঘ

  B and D

  ঙ

  A, B and E
• System class is defined in .................
  ক

  java.util package

  খ

  java.lang package

  গ

  java.io package

  ঘ

  java.awt package

  ঙ

  None of these
• What is the purpose of the `Console` class in Java?
  ক

  It provides methods for reading and writing binary data

  খ

  It provides methods for creating directories

  গ

  It provides methods for performing mathematical operations

  ঘ

  It provides methods for reading and writing character-based console input and output
• In Java, which class is used to read binary data from an input stream?
  ক

  `PrintStream`

  খ

  `BufferedReader`

  গ

  `DataInputStream`

  ঘ

  `FileInputStream`
• What is the difference between reading and writing character streams in Java?
  ক

  Both reading and writing character streams use `InputStream` classes

  খ

  Reading character streams use `Reader` classes, while writing character streams use `Writer` classes

  গ

  Both reading and writing character streams use `OutputStream` classes

  ঘ

  Both reading and writing character streams use `InputStream` classes
• In Java, what is the primary purpose of the `PrintStream` class?
  ক

  It is used to read binary data from a file

  খ

  It is used to write binary data to a file

  গ

  It is used to write formatted text to an output stream

  ঘ

  It is used to read text data from the keyboard
• Which class is used for reading character streams in a platform-independent way in Java?
  ক

  `BufferedReader`

  খ

  `DataInputStream`

  গ

  `FileReader`

  ঘ

  `InputStreamReader`
• In Java, what is the purpose of the `BufferedWriter` class?
  ক

  It is used to write character data to a file efficiently

  খ

  It is used to write binary data to a file

  গ

  It is used to read character data from a file

  ঘ

  It is used to read binary data from a file
• What is the difference between character streams and byte streams in Java?
  ক

  Character streams are used for reading and writing binary data, while byte streams are used for text data

  খ

  There is no difference between character streams and byte streams

  গ

  Character streams are more efficient than byte streams

  ঘ

  Character streams are used for reading and writing text data, while byte streams are used for reading and writing binary data
• In Java, what is the purpose of the `File.separator` constant?
  ক

  It represents the parent directory

  খ

  It represents the current directory

  গ

  It represents the platform-specific file separator (e.g., `/` or ``)

  ঘ

  It represents the ASCII value of the separator character
• Which method is used to delete a file or directory in Java?
  ক

  `erase()`

  খ

  `delete()`

  গ

  `discard()`

  ঘ

  `erase()`
• In Java, how can you check if a file or directory exists using the `File` class?
  ক

  By using the `createNewFile()` method

  খ

  By using the `read()` method

  গ

  By using the `exists()` method

  ঘ

  By using the `write()` method
• What is the primary purpose of the `File` class in Java?
  ক

  It is used to perform mathematical operations

  খ

  It is used to write data to a file

  গ

  It is used to read data from a file

  ঘ

  It represents a file or directory pathname
• In Java, which class is used to read and write character streams?
  ক

  `Reader` and `Writer` classes

  খ

  `InputStream` and `OutputStream` classes

  গ

  `BufferedReader` and `PrintWriter` classes

  ঘ

  `DataInputStream` and `DataOutputStream` classes
• What is the purpose of the `RandomAccessFile` class in Java?
  ক

  It is used to read data from the keyboard

  খ

  It is used to write data to a file

  গ

  It is used to perform mathematical operations

  ঘ

  It allows reading and writing at random positions in a file
• Which class is used to write primitive data types to an output stream in Java?
  ক

  `FileReader`

  খ

  `FileWriter`

  গ

  `DataOutputStream`

  ঘ

  `DataInputStream`
• In Java, what does the `DataOutputStream` class do?
  ক

  It is used to read binary data from a file

  খ

  It is used to write primitive data types to an output stream

  গ

  It is used to read data from the keyboard

  ঘ

  It is used to read binary data from a file
• In Java, what is the primary purpose of the `DataInputStream` class?
  ক

  It is used to read text data from a file

  খ

  It is used to write binary data to a file

  গ

  It is used to read primitive data types from an input stream

  ঘ

  It is used to perform mathematical operations
• Which class is used to write formatted text to a file in Java?
  ক

  `OutputStream`

  খ

  `BufferedWriter`

  গ

  `Scanner`

  ঘ

  `PrintWriter`
• What is the purpose of the `FileWriter` class in Java?
  ক

  It is used to write character data to a file

  খ

  It is used to read character data from a file

  গ

  It is used to write binary data to a file

  ঘ

  It is used to read binary data from a file
• In Java, which method is used to write binary data to a file?
  ক

  `read()`

  খ

  `print()`

  গ

  `scan()`

  ঘ

  `write()`
• Which class is used to write binary data to a file in Java?
  ক

  `InputStream`

  খ

  `BufferedReader`

  গ

  `FileOutputStream`

  ঘ

  `FileReader`
• What is the purpose of the `PrintWriter` class in Java?
  ক

  It is used to read binary data from a file

  খ

  It is used to write formatted text to a file

  গ

  It is used to read text from the keyboard

  ঘ

  It is used to read binary data from a file
• In Java, what does the `FileOutputStream` class do?
  ক

  It is used to read data from a file

  খ

  It is used to read data from the keyboard

  গ

  It is used to write data to a file

  ঘ

  It is used to create directories