Final answer:
The replace function typically replaces all occurrences of a specified substring with another substring in a given text, although some variations might target only the first or last occurrence.
Step-by-step explanation:
The replace function is typically used in programming and text processing to modify strings. The specifics of what the replace function does can vary depending on the programming language or software being used, but in general:
- Option 1 and Option 2 suggest that the replace function substitutes a specified substring with another substring within a given text. While Option 1 is ambiguous about how many times the replacement occurs, Option 2 specifies that all occurrences of the substring are replaced.
- Option 3 states that the replace function targets only the first occurrence of the specified substring.
- Finally, Option 4 suggests that the replace function affects the last occurrence of the specified substring.
The most common behavior for a replace function is that represented by Option 2— it usually replaces all occurrences of a specified substring with another substring in a given text. However, some languages and tools may offer additional replace functions or parameters that allow you to specify whether to replace the first, last, or all occurrences.