QUIZ ON : c - MACRO

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What is the purpose of the typedef keyword in C? What is the purpose of the typedef keyword in C?

A. It is used to define a macroIt is used to define a macro

B. It is used to define a function prototypeIt is used to define a function prototype

C. It is used to define a structureIt is used to define a structure

D. It is used to create an alias for an existing data typeIt is used to create an alias for an existing data type

Which of the following is not a valid variable name declaration? निम्नलिखित में से कौन सा वैध variable नाम घोषणा नहीं है?

A. float PI = 3.14;float PI = 3.14;

B. double PI = 3.14;double PI = 3.14;

C. int PI = 3.14;int PI = 3.14;

D. #define PI 3.14#define PI 3.14

What happens to macros during the preprocessing phase of a C program? What happens to macros during the preprocessing phase of a C program?

A. They are compiledThey are compiled

B. They are replaced by their corresponding valuesThey are replaced by their corresponding values

C. They are ignoredThey are ignored

D. They are executedThey are executed