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C Language - Storage Classes

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25.

If the definition of an external variable does not contain an initializer, it is known as

A.	forward declaration	B.	tentative definition
C.	backward reference	D.	backward definition

26.

External variable definition

A.	creates the variable	B.	allocates memory
C.	does not use extern keyword	D.	all the above

27.

External variable delaration

A.	does not allocate memory	B.	uses keyword extern
C.	cannot be initialized	D.	all the above

28.

What are the valid C scopes of identifiers ?

A.	external and local	B.	project, file, and block
C.	global, file and local	D.	file and block

29.

How is a variable accessed from another file ?

A.	The global variable is referenced via the global specifier.	B.	The global variable is referenced via the extern specifier.
C.	The global variable is referenced via the auto specifier.	D.	The global variable is referenced via the pointer specifier.

30.

Array sizes are optional during array declaration by using ______ keyword.

A.	auto	B.	static
C.	extern	D.	register

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