What is the format identifier for “static a = 20.5;”?
Answer: B
Correct answer: %d
With no type given, static a = 20.5; falls back on the old implicit int, so the value is truncated to 20 and the correct specifier is %d. The declaration is legal only under the pre-C99 rules; a modern compiler will warn or reject it.
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Functions have the static qualifier by default.
Answer: B
Correct answer: false
Functions have external linkage by default, not static - which is why a function defined in one file can be called from another. Writing static before a function is what confines it to its own file.
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Is initialization mandatory for local static variables?
Answer: B
Correct answer: NO
Initialisation is optional. A static variable with no initialiser is zero-initialised automatically, since it has static storage duration - unlike an automatic variable, which would hold junk. (If an initialiser is given, it must be a constant expression.)
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