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What is the difference between CI and CD
CI is a factory quality gate: every merge triggers a build-and-test conveyor belt. CD is the conveyor belt continuing all the way to production — either automatically (Continuous Deployment) or with one human door (Continuous Delivery).
What is DNS Resolution
DNS resolution is like asking a chain of librarians for a book's shelf number: you ask your local desk, they ask a floor supervisor, who asks the head archivist, until someone knows the exact location.
Why is Redis so fast?
Redis is a librarian who keeps every book on a desk, never walks to the shelves, answers one question at a time so no one fights over a book, and writes in a single neat ledger instead of locking a filing cabinet.
What is the OWASP Top 10
A ranked list of the ten most dangerous web application vulnerability classes — think of it as a fire-code checklist: not every possible fire hazard, just the ones that burn buildings down most often.