How will you truncate a file using Node?

Answer:

Following is the syntax of the method to truncate an opened file:

fs.ftruncate(fd, len, callback)

Parameters

Here is the description of the parameters used:

• fd - This is the file descriptor returned by file fs.open() method.

• len - This is the length of the file after which file will be truncated.

• callback - This is the callback function which gets no arguments other than a possible exception are given to the completion callback.