What is the difference between a macro and a function?

C interview questions, your interviewer might ask

• What is the difference between declaration and definition of a variable?
• What is the difference between global and static global variables?
• What are storage classes in C language?
• Differentiate between an internal static and external static variable?
• What is the difference between typedef & Macros?
• What is the output of the below C code?
• What is the variable in C?
• Using the variable p write down some declaration
• What are the data types in C?
• What are the uses of the keyword static?
• What are the different types of linkage?
• Can static variables be declared in a header file?
• Size of the integer depends on what?
• Are integers signed or unsigned?
• What is a difference between unsigned int and signed int in C?
• What is the difference between a macro and a function?
• What is the output of the below C code?
• What do you mean by enumeration in C?
• What does the keyword const mean?
• When should we use const in a C program?
• What is the meaning of the below declarations?
• What is the output of the below C program?
• Differentiate between a constant pointer and pointer to a constant?
• What are the post-increment and decrement operators?
• Which one is better: Pre-increment or Post increment?
• Are the expressions *ptr++ and ++*ptr same?
• Are the expressions *++ptr and ++*ptr same?
• C Program to Count Number of Words in a given string
• C Program to Count Number of Words in a given file

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