Novell Interview Question for Software Engineer / Developers






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A structural type system (or property-based type system) is a major class of type system, in which type compatibility and equivalence are determined by the type's structure, and not by other characteristics such as its name or place of declaration. Structural systems are used to determine if types are equivalent and whether a type is a subtype of another. It contrasts with nominative systems, where comparisons are based on explicit declarations or the names of the types, and duck typing, in which only the part of the structure accessed at runtime is checked for compatibility.

- rahultiwari6490 August 18, 2011 | Flag Reply
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A type-checker for a statically typed language must verify that the type of any expression is consistent with the type expected by the context in which that expression appears. For instance, in an assignment statement of the form x := e, the inferred type of the expression e must be consistent with the declared or inferred type of the variable x. This notion of consistency, called compatibility, is specific to each programming language.

- rahultiwari6490 August 18, 2011 | Flag Reply


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