Cache & State

Interview Questions

Authentication through HTTP headers, context setup. Use Apollo Link for token management. Features: JWT handling, session management. Implement token refresh, secure storage.

Token management through secure storage, automatic refresh. Implement token rotation, expiration handling. Features: JWT validation, secure transmission. Consider security implications.

CORS handling through proper server configuration, client setup. Implement request headers, preflight handling. Features: origin validation, credential handling. Ensure secure cross-origin requests.

Persisted queries security through proper whitelisting, validation. Implement query registry, access control. Features: query verification, cache security. Prevent query injection.

Secure websockets through proper authentication, token validation. Implement connection params, protocol security. Features: connection lifecycle, error handling. Ensure secure real-time communication.

Error security through proper message handling, stack trace protection. Implement error masking, logging strategy. Features: error sanitization, security logging. Prevent sensitive information exposure.

Local state security through proper encryption, access control. Implement secure storage, data handling. Features: sensitive data protection, secure operations. Prevent client-side vulnerabilities.

Secure persistence through proper encryption, storage strategy. Implement secure cache, local storage. Features: data protection, access control. Ensure secure client-side storage.

Fragment security through proper access control, type checking. Implement fragment masking, permission validation. Features: field-level security, type restrictions. Prevent unauthorized data access.

Authorization through directives, field-level checks. Implement role-based access, permission validation. Features: context-based auth, error handling. Ensure proper access control.

Secure uploads through proper validation, token verification. Implement file type checks, size limits. Features: multipart requests, progress tracking. Consider security measures.

Cache security through proper data handling, sensitive info protection. Implement cache policies, access control. Features: data encryption, secure storage. Prevent data leaks.

OAuth integration through proper flow implementation, token management. Handle authorization code, access tokens. Features: refresh flow, state management. Ensure secure authentication.

Mutation security through proper validation, authorization checks. Implement input sanitization, access control. Features: data validation, error handling. Prevent unauthorized modifications.

Rate limiting through proper configuration, request tracking. Implement throttling logic, error responses. Features: limit enforcement, user identification. Prevent abuse and DOS attacks.

Secure downloads through proper authentication, access validation. Implement token verification, stream handling. Features: file access control, secure transfer. Ensure secure file delivery.

RBAC through directives, context checks. Implement permission system, role validation. Features: hierarchical roles, permission inheritance. Ensure proper authorization.

Directive security through proper validation, execution control. Implement directive restrictions, permission checks. Features: directive scope, security boundaries. Prevent directive misuse.

Apollo Link manages request/response pipeline. Add authentication headers, handle errors. Features: token injection, request modification. Essential for security implementation.

Session management through proper storage, expiration handling. Implement session tokens, refresh mechanism. Features: session validation, secure storage. Ensure secure user sessions.

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