Answer
Custom exceptions are user-defined exception classes representing application-specific errors.
Quick Answer
Custom exceptions are your own exception classes that extend Exception. They let you signal application-specific errors with meaningful names and carry extra context. OrderNotFoundException is clearer than a generic Exception. By convention, exception class names always end with Exception.
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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.
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Source: SugharaIQ