Question 1

How can you tell if two files are hard link to each other?

Accepted Answer

The way to recognize a hard link is to look at the second field in a long file listing. If it's a "1", the file has no hard links. If it's 2 or greater (and not a directory), the same file exists somewhere else in the file system.

Question 2

Can multiple inodes point to the same file?

Accepted Answer

Each file in a filesystem has a unique inode number. Inode numbers are guaranteed to be unique only within a filesystem (i.e., the same inode numbers may be used by different filesystems, which is the reason that hard links may not cross filesystem boundaries).

Question 3

How to find if two file names refer to the same file?

Accepted Answer

The method java.io.File.equals () is used to find if the two file names refer to the same File in Java. This method requires a single parameter i.e.the file object that is to be compared to the other file object. It returns if the file objects are same and false otherwise. A program that demonstrates this is given as follows &minus;

Question 4

How do I check if two files have the same content?

Accepted Answer

GNU cmp compares two files byte by byte and prints the location of the first difference. We can pass the -s flag to find out if the files have the same content. Since -s suppresses all output, we should echo the exit code to know the result.

Question 5

How to compare the contents of two files using memory-mapped files?

Accepted Answer

Let's write a very simple example that shows how to compare the contents of two files using memory-mapped files: The method returns true if the contents of the files are identical, otherwise, it returns false. We open the files using the RamdomAccessFile class and access their respective FileChannel to get the MappedByteBuffer.

Question 6

How to compare two files of different sizes?

Accepted Answer

We can see that if the files are of different sizes but the bytes of the smaller file match the corresponding bytes of the larger file, then it returns the size in bytes of the smaller file. 3. Line by Line Comparison To compare text files, we can do an implementation that reads the files line by line and checks for equality between them.

How to check whether two file names point to the same physical file

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How to check whether two file names point to the same physical file

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