Java - IO - Interview Questions and Answers on BufferedWriter

Q1.  Tell something about BufferedWriter ? What are flush() and close() used for ?

Ans. A Buffer is a temporary storage area for data. The BufferedWriter class is an output stream.It is an abstract class that creates a buffered character-output stream.

Flush() is used to clear all the data characters stored in the buffer and clear the buffer.

Close() is used to closes the character output stream.

Q2.  Which of the following code is correct ?

a. 


FileWriter fileWriter = new FileWriter("../file.txt");
File file = new File(fileWriter );
BufferedWriter bufferedOutputWriter = new BufferedWriter(fileWriter);

b. 

BufferedWriter bufferedOutputWriter = new BufferedWriter("../file.txt");
File file = new File(bufferedOutputWriter );
FileWriter fileWriter = new FileWriter(file);


c. 

File file = new File("../file.txt");
FileWriter fileWriter = new FileWriter(file);
BufferedWriter bufferedOutputWriter = new BufferedWriter(fileWriter);

d.

File file = new File("../file.txt");
BufferedWriter bufferedOutputWriter = new BufferedWriter(file); 
FileWriter fileWriter = new FileWriter(bufferedOutputWriter );

Ans. c. 

File file = new File("../file.txt");
FileWriter fileWriter = new FileWriter(file);
BufferedWriter bufferedOutputWriter = new BufferedWriter(fileWriter);