C C++ Errors Question:
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Explain what is macro in c?
Difference between single linked list & double linked list what is fifo & lifo?
what is stack & queue?

Answer:

Macros are preprocessor directives that are defined using #define directive. Macros consist of two parts Macro_Name, & Macro_Substitution_Text.
Before the source code gets complied, the preprocessor will check for the presence of macros. & wherever it found that macro simply replaces that macros with substitution text.

Macros are not Type Safe.

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