What is the most important configurable resource for MyISAM?

Solution(By Examveda Team)

This question is asking about a setting in MySQL that helps the MyISAM storage engine work faster. MyISAM is a type of storage engine used to store data.
Let's break down the options:
A) key cache: This is the most important setting for MyISAM. It stores information about the indexes used to quickly find data in your tables.
B) memory cache: This isn't directly related to MyISAM. It's a general MySQL setting for caching data in memory.
C) time cache: There's no such thing as a "time cache" in MySQL.
D) speed cache: This isn't a real setting either. It's just a general term.
So the answer is A) key cache.
Think of it like this: if you have a big book of names and addresses, a good index lets you find someone quickly. The key cache is like a super-fast index for MyISAM tables.