OCP OCP Java IO and NIO

Question 1

Which Java class is designed specifically to read character data from a file using a character stream?

Accepted Answer

FileReader

Answer

FileInputStream

Answer

BufferedInputStream

Answer

DataInputStream

Question 2

What is the primary benefit of wrapping a FileWriter with a BufferedWriter in Java?

Accepted Answer

It reduces the number of actual write operations through internal buffering

Answer

It compresses data before writing to the file

Answer

It enables writing to multiple files simultaneously

Answer

It automatically flushes on each write call

Question 3

What exception type must be handled or declared when performing file I/O operations in Java?

Accepted Answer

IOException

Answer

RuntimeException

Answer

FileException

Answer

StreamException

Question 4

Which Java I/O class provides methods like readInt() and readDouble() to read primitive data types from a binary file?

Accepted Answer

DataInputStream

Answer

FileReader

Answer

ObjectInputStream

Answer

RandomAccessFile

Question 5

What guarantee does the Java try-with-resources statement provide when used with I/O streams?

Accepted Answer

Streams are automatically closed when the try block exits

Answer

Streams are opened only once per program run

Answer

Exceptions thrown inside streams are always suppressed

Answer

Streams are flushed to disk before the block exits

Question 6

Which method of the java.io.File class returns true if the file or directory at the specified path exists on the file system?

Accepted Answer

exists()

Answer

isPresent()

Answer

checkExists()

Answer

fileFound()