C Programming
Use of functions

Helps to avoid repeated programming across programs.
Enhances the logical clarity of the program.
Helps to avoid repeating a set of statements many times.
Makes the debugging task easier.
All of these

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C Programming
C preprocessor

All of these
Takes care of include files
Takes care of conditional compilation
Takes care of macros
Acts before compilation

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C Programming
String concatenation means -

Extracting a substring out of a string.
Comparing the two strings to define the larger one.
Combining two strings.
Merging two strings.
Partitioning the string into two strings.

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