What depends on one’s needs. What are some suggestions? If you’re conversing with both non-Natives in a conversation, say an Indian, then the former would be fine. Why is the “request query” not involved? In written communication, go for the formal approach of the the statement. What is the more effective phrase “I have a question regarding this”?

Can one pluralize nouns using postpositive adjectives?

How can I get more points for my innumerable matters: matters unknown or things innumerable or accounts payable/poets laureate/poetry general?

In the sentence given by you, compiler is the noun, multiple compilers are being referred to and the perfect caption is being applied to them, hence, compilers proper would be correct.

Which are some informal responses to Jim’s short answer, I’d say in a more formal or delicate setting, you

could use: To answer

nature’s call Source: http://www.oxforddictionaries.com com/definition/english/the-call-of-nature/

the-call-of-nature.