Surprisingly gold is the hardest to find
You should state what language you want your answer to be in before you ask programming questions. Here is what you're looking for in Java:
<span>public static String replace(String str) {
return str.replace(' ', '*')<span>;
</span>}</span>
Answer:
Designations at the end of file names such as .docx and .html are called. File extensions.
Explanation: