Knowledge center. Albinism is a genetic condition also called achromia, achromasia, or achromatosis. It is characterized by a deficit in the production in melanin and by the partial or complete absence of pigment in the skin, hair and eyes.
Alpha stands for alphabets and numeric stands for number. So a non alpha numeric character will be any symbol without letters (alphabets) or numbers. As you are aware, an upper case means capital letter. e.g., A, B, C, etc. and a lower case are small letters: a, b, c, etc. So out of the 8 number of characters, you were asked to use at least. one capital letter.
Alpha characters are the letters A - Z. Numeric characters are 0 -9. Special characters are generally thought of as being those symbols associated with the numeric characters. Alpha-numeric and special characters are very useful when creating a password or phrase. For Example: Myd0gisSh@d0w (My dog is Shadow)