Quick Answer
Django forms: Form class with field types (CharField, EmailField, IntegerField) and validators. is_valid() runs validation. cleaned_data provides sanitized values. ModelForm auto-generates form from a Model. Flask-WTF adds CSRF protection and WTForms to Flask. FastAPI uses Pydantic models for request validation with automatic type coercion and error messages.
Answer
Form libraries parse, validate, and sanitize input. Flask uses WTForms; Django has built-in forms with validation rules. Protects against invalid and malicious input.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
