Why is redundancy of data undersirable?

 The redundancy of the data is usually undesirable as, in the database structure design it basically causes issues keeping up consistency after the updating from the system. Be that as it may, excess can once in a while lead improving the performance of the system.

The data redundancy also waste several type of data in the disk storage that cause the waste of memory so that is why it is undesirable.

For instance, we use the redundancy can be utilized instead of joining to the interface information.

answer; ///i believe that the correct answer is (b) to both side choose a fair and impartial jury;

the difference is right there dont you see it