C Programming
The library function used to find the last occurrence of a character in a string is

strstr()
None of these
strrchr()
laststr()
strnstr()

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C Programming
Use of functions

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

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C Programming
C preprocessor

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

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