#1
Which keyword is used to define a macro in C?
#define
ExplanationDefines a macro.
#2
What does the preprocessor directive #include do in C?
Includes the standard input/output functions
ExplanationIncludes standard input/output functions.
#3
What is the purpose of the ## operator in C macro definitions?
Concatenates two tokens
ExplanationConcatenates two tokens.
#4
In C, what is the significance of the #undef directive?
Undefines a macro
ExplanationUndefines a macro.
#5
What is the purpose of the #ifdef preprocessor directive in C?
Checks if a macro is defined
ExplanationChecks if a macro is defined.
#6
How can you concatenate two strings in a C macro?
Using the ## operator
ExplanationUsing the ## operator to concatenate strings.
#7
Which preprocessor directive is used for conditional compilation in C?
#if
ExplanationUsed for conditional compilation.
#8
What is the purpose of the #pragma once directive in C?
Ensures that the header file is only included once
ExplanationEnsures the header file is only included once.
#9
Which of the following is true about function-like macros in C?
They can have parameters
ExplanationFunction-like macros can have parameters.
#10
What is the purpose of the # operator in a C macro?
Indirectly references a variable
ExplanationIndirectly references a variable.
#11
In C, what is the role of the #pragma directive?
Specifies compiler-specific instructions
ExplanationSpecifies compiler-specific instructions.
#12
What is the purpose of the __FILE__ macro in C?
Returns the current file name
ExplanationReturns the current file name.
#13
What is the purpose of the #error directive in C?
Outputs an error message during compilation
ExplanationOutputs an error message during compilation.
#14
How are inline functions different from function-like macros in C?
Inline functions are defined using the #define directive
ExplanationInline functions are defined using the #define directive.