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Why is ThreadPool better than Threads in Java
A thread pool is a taxi dispatch centre: a fixed fleet of cabs waits for fares instead of a new cab being manufactured and scrapped for every single ride. You pay the manufacturing cost once, then reuse.
What is the CAP Theorem
A distributed system is like a library with two branches in a storm: when the phone line between them cuts out, you must choose whether to give customers a possibly stale answer or no answer at all.
What is LLM Quantization
Quantization is like reprinting a novel in a smaller font: the story stays the same, the book fits in your pocket. It converts a model's high-precision weights into lower-precision numbers so the model runs faster and cheaper.
What is a CDN (Content Delivery Network)?
A CDN is a globally distributed network of caches — like stocking every neighbourhood convenience store with your most popular items so nobody drives to the central warehouse. Users get the nearest copy; your origin server stays quiet.
What is CIDR
CIDR (Classless Inter-Domain Routing) is a way to describe a block of IP addresses as one address plus a prefix length — like saying 'the first 24 bits are fixed, the rest are yours to use'.
What is the Difference Between Cloud and a VPS
A VPS is a reserved room in one hotel — your ceiling is fixed. Cloud is a hotel that can instantly move you to a bigger room, or ten rooms, on demand. You pay for the room; cloud lets you rent the whole floor by the minute.
Why You Should Never Reuse Passwords
Reusing a password is like using one master key for your house, car, and office: one copy stolen anywhere unlocks everything. A breach at any site hands attackers a skeleton key to your entire digital life.
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.