What is I/O stream in java? Write a program in java to create a file and copy the content of an already existing file into it.

Write a program in C/C++ which is passed as command line argument a file name. Your program will readdatafrom the file using read system call. The program will then pass the contents of the file to a pipe and create a child process. The child process will read the file’s content from the pipe.The child process does two things to the file data: 1) it removes all integers from the pipe. 2) It changes the case of all alphabets. The child process then writes the modified file data to the second pipe. The parent then reads this data from the second pipe andwrites the data(using write system call)to a new filewhose name is also passed as command line argument.The input file from which the data will be read has no size restriction

Python please

2. Suppose that you are implementing a program to write a string "CSE SS0" in a binary file. Java provides you three different methods – writeBytes(String), writeChars(String), and writeUTF(String). How many bytes will be written by each of those method for the give string? Which method did you find as the most efficient?