Java Programming - MCQ Practice Questions

In Java NIO, which class replaces traditional Stream-based I/O for better performance?

What happens if you call close() multiple times on a stream?

Which of the following is true about serialization in Java?

In a multi-threaded environment, which stream class provides thread-safe read/write operations without external synchronization?

A developer uses PipedInputStream and PipedOutputStream in the same thread. What will happen?

A program reads a 1 GB binary file and needs to modify specific bytes at random positions. Which class is most suitable?

In Java NIO, what is the primary advantage of FileChannel over traditional streams?

For a real-time log file monitoring application, which approach is most suitable?

For encrypting data while writing to a file, which approach is most appropriate?

In Java NIO, what is a key advantage of FileChannel over traditional I/O streams?

Which serialization approach maintains backward compatibility better?

For developing a high-performance file copying utility handling files up to 10GB, which approach is optimal?

Given the code: PrintWriter pw = new PrintWriter(new FileWriter("file.txt")); What issue might occur?

Which approach would you use to read and write objects to a file efficiently in a production application?

In a log aggregation system, what is the primary advantage of using RandomAccessFile over sequential streams?

What is the main advantage of using RandomAccessFile over sequential streams?

When deserializing an object, which methods are called in order?

Consider a scenario where you need to read a large binary file efficiently without loading it entirely into memory. Which approach combines best practices?

What is the primary advantage of PushbackInputStream?

In a multi-threaded application, multiple threads are writing to the same file simultaneously using FileOutputStream. What is the primary issue and best solution?