Final answer:
In SOSL, '?' and '*' are the wildcards used to match single characters and zero or more characters, respectively, facilitating flexible searches within Salesforce.
Step-by-step explanation:
The wild cards in Salesforce Object Search Language (SOSL) are ? and *. The ? wildcard is used to match any single character, and the * wildcard matches zero or more characters. These wildcards help to perform more flexible search operations within Salesforce. For example, searching for 'ca?e' matches words like 'case' or 'cake'. Searching for 'ca*' would match any word that starts with 'ca' like 'car', 'cat', 'category', etc. The other characters listed like '_', '%', and '#' are not recognized as wildcards in SOSL.