Exercise 1: A Site-Scoped Exact-Phrase Query for Stack Overflow — Possible Solution
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THE QUERY
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"connection timed out" site:stackoverflow.com

WHY THE PHRASE IS QUOTED
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Per Chapter 2, wrapping a phrase in double quotes forces a literal,
in-order match rather than a loose match on pages that merely contain
the individual words "connection," "timed," and "out" scattered
unrelated to each other. Since this is a specific, recognizable error
message, quoting it ensures results actually contain that exact
wording rather than only loosely related content.

WHY site: IS NECESSARY
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Per this chapter, site: restricts results to one domain -
site:stackoverflow.com. Without it, the query would search the entire
indexed web, and while Stack Overflow results might still appear near
the top for a popular error message, there's no guarantee - and no way
to be certain every result actually comes from that specific,
generally trusted source rather than a lower-quality site that happens
to also mention the same phrase.

WHY THE COLON HAS NO SPACE AFTER IT
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Per this chapter's own warning, site: developer.mozilla.org (with a
space after the colon) breaks the operator entirely - it has to be one
unbroken token, site:stackoverflow.com, for the search engine to
recognize it as an operator rather than stray text.

WHY THIS WORKS AS AN ANSWER
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It justifies each piece of the query independently rather than just
assembling operators from memory, correctly reuses Chapter 2's own
phrase-quoting rule alongside this chapter's site: operator, and
explicitly calls out the no-space requirement this chapter singled out
as the most common way the operator silently fails.