Materials on AI, Python, Git, SQL, Web/API, SAP/ERP, statistics and time series: explanations, examples, practical tips, sources and applicability limits.
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Understand the differences between offset-based and cursor-based pagination and when to use each, especially when dealing with frequently changing datasets.
Distinguish storage, validation and shared caching. Three response policies show when to use public max-age, private no-cache and no-store.
Separate a request timeout from the total retry budget, interpret Retry-After, and avoid duplicating writes when the server outcome is unknown.
Define the caller, payload, atomic claim and replay policy so a retry has a predictable application result.
Use If-None-Match to revalidate cached responses and If-Match to avoid overwriting a newer representation.
Distinguish response access from request sending, inspect an OPTIONS preflight and configure explicit origins for credentialed browser requests.