Object Oriented Programming MCQs

Page No. 89

What are automatic variables?


aGlobal variables

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bImplicit/temporary variables

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cLocal variables

✓


dSystem variables

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View Answer Local variables

Why are functions extern by default?


a Because functions are always private

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b Because those are not visible throughout the program

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cBecause those can’t be accessed in all parts of the program

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dBecause those are visible throughout the program

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If extern variable is initialized with the declaration then _______________________


aAlso the header file with definition is required

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bThe header file with definition must be included

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cThere is no need to include any other header file for definition

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dThe extern variable produces compile time error

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If the definition is given in the header file that we include then ________________


aThe program can run successfully

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bAlso the program should define the extern variable

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cThe extern variable must contain two definitions

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dExtern variable can’t be used in the program

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What will be the output of the program?


a10

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b11

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cRun time error

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dCompile time error

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View Answer Compile time error

Which is the correct syntax for extern function declaration?


a extern function_name(argument_list);

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bextern return_type function_name(argument_list);

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cextern (return_type)function_name(argument_list);

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dreturn_type extern function_name(argument_list);

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Which is the correct syntax for extern variable declaration?


aextern data_type variable_name;

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bextern variable_name;

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cdata_type variable_name extern;

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dextern (data_type)variable_name;

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Which of the following results in the allocation of memory for the extern variables?


aDeclaration

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bDefinition

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c Including file

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dMemory is not allocated for extern variables

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View Answer Definition

Even if a variable is not declared as extern, it is extern by default.


aTrue

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bFalse

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cA & B

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d None of the above

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View Answer False

Whenever a function is declared in a program _____________________


a extern can be used only in some special cases

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b extern can’t be used

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cfunction is extern by default

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d it can’t be made extern

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