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.
Alphanumeric refers to a character set with alphabetic characters (A-Z) and numerals (0-9). Other characters also may be included in an alphanumeric character set. Alphanumeric data is useful for storing text and website addresses. Alphanumeric is also known as alphameric.