Answer
A nullable type allows a value type to also store a null value. It is useful when a variable may or may not have a valid data value.
Quick Answer
By default, value types like int cannot be null. Nullable types (int? or Nullable) allow them to hold null — useful for optional values like database columns. Check with .HasValue, read with .Value, or use ?? for a default fallback.
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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