The order in which catch blocks are placed in a program has no impact on which catch block is executed.

The order in which catch blocks are placed in a program does have an impact on which catch block is executed. In general, the catch blocks should be ordered from most specific to least specific, with the most specific exception types listed first. If a more specific catch block is placed after a less specific catch block, the less specific catch block may catch the exception first, leading to unexpected behavior.