•Strings in C are simply arrays of characters terminated with ‘\0’ (null character)
•NULL terminates a string.
This null character has ASCII value 0.
Terminating null is important as it’s only way to tell where string ends.Infact,string not terminated by ‘\0’ is not really a string but merely collection of ch’s.
The non destructive technique is quality control method that does not damage the material or product being tested.
The basic purpose of non destructive testing is to know the quality of material such that it may be considered for a particular job or may be rejected if it is not upto the specifications.
Term ‘Non-destructive testing’ is used in general form as this method uses testing or inspection without changing the structural properties of the material so that it may still be used in future. These have the following