Answer
A sealed class cannot be inherited. It prevents further extension and allows the compiler to optimize method calls.
It is commonly used to avoid misuse or unintended inheritance.
Quick Answer
A sealed class cannot be inherited — no subclasses allowed. It prevents unintended extension and lets the compiler optimize virtual method calls. The string class is sealed. Use it when your class is complete as-is and inheritance would break its design.
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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