Technical Question Bank · Peer-Reviewed
Search and filter frequently asked interview questions across technical, programming, and behavioral domains. Tailor your interview preparation by difficulty for freshers or experienced developers (29 available).
Both are Elastic Load Balancers, but they operate at different OSI layers. - Application Load Balancer (layer 7) understands HTTP and HTTPS, supports host and path-based ...
Observability is the ability to understand a system's internal state from its outputs, so you can debug novel problems without shipping new code. - Metrics: cheap numeric...
Specificity ranks selectors as (inline, IDs, classes/attributes/pseudo-classes, elements/pseudo-elements). Higher wins; equal specificity falls back to source order (late...
Precision is the fraction of predicted positives that are truly positive: TP / (TP + FP). Recall, or sensitivity, is the fraction of actual positives that were found: TP ...
A canary releases the new version to a small slice of traffic before a full rollout. Process: 1. Deploy the new version alongside the stable one. 2. Route a small percent...
Composer is PHP's dependency manager. It reads composer.json, resolves a version graph and writes composer.lock to pin exact versions for reproducible installs. composer ...
ACID describes the guarantees of a transaction, a unit of work that either completes fully or not at all. - Atomicity: all statements commit or all roll back. Implemented...
An IP address is split into a network part and a host part by the subnet mask, which can be written as a CIDR prefix. `/24` means the first 24 bits are the network, leavi...
Make rollback a first-class, automated, and tested operation. - Immutable artefacts: deploy versioned images or packages so you can redeploy the previous one exactly. - D...
A good retrospective is safe, focused and produces a small number of owned actions. I set the stage and remind everyone of the prime directive: we assume good intent and ...
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