How can I implement opaque (abstract) data types in C? What's the difference between these two declarations? struct x1 { ... }; typedef struct { ... } x2;

Explain the Opaque ?

ORA-22997: VARRAY | OPAQUE stored as LOB is not specified at the table level

ORA-30772: opaque types do not have default constructors

PLS-00581: inheritance is not supported for opaque types

PLS-00582: attribute declarations are not allowed in opaque types

PLS-00583: size must be specified if opaque type is fixed-length

PLS-00584: size of an opaque type must be between 1 and 4000 bytes

PLS-00585: declared support library for opaque type is not a library

. The colour of an opaque object is due to the colour it (a) Absorbs (b) Refracts (c) Reflects (d) Scatters

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what is opaque testing?,what is transparent testing

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What is an opaque pointer?

What is the opaque?

Explain what is the opaque?