Final answer:
For fixed length string fields (String, WString), the character limit is approximately 2 billion characters.
Step-by-step explanation:
For fixed length string fields (String, WString) in programming languages such as Java and C#, the character limit is determined by the number of characters that can be stored in the variable or data structure that holds the string.
In Java, the character limit depends on the maximum length of an array, which is 231-1 characters. In C#, the maximum length of a string is 231-1 characters.
Therefore, the character limit for fixed length string fields is approximately 2 billion characters.