TypeScriptgeneral
Interview Questions
Mar 28, 2026
ViewAuthentication & Authorization: Fundamentals. Authentication (AuthN) verifies identity — who are you? Authorization (AuthZ) determines permissions — what are you allowed to do? They are distinct concerns and should be im…
ReadAuthentication: OAuth 2.0 & OpenID Connect. OAuth 2.0 is an authorization framework — it lets users grant third-party apps access to their resources without sharing credentials. OpenID Connect (OIDC) is a thin identity l…
ReadAuthentication: JWT & Token Security. JWT Structure. JWT = base64url(header) . base64url(payload) . signature Header: { "alg": "RS256", "typ": "JWT" } Payload: { "sub": "user123", "email": "alice@example.com", "roles": […
ReadAuthorization: RBAC, ABAC & Best Practices. Role-Based Access Control (RBAC). RBAC assigns permissions to roles, then roles to users. Simple to manage for most applications.. // Roles and permissions const ROLES = { admi…
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