C Programming – C-Preprocessor

C Programming - C-Preprocessor

Question 1

Property which allows to produce different executable for different platforms in C is called?

A	File inclusion
B	Selective inclusion
C	Conditional compilation
D	Recursive macros

Question 2

#include is called

A	Preprocessor directive
B	Inclusion directive
C	File inclusion directive
D	None of the mentioned

Question 3

C preprocessors can have compiler specific features.

A	true
B	false
C	Depends on the standard
D	Depends on the platform

Question 4

What is the output of this C code?

    #include 
    #define foo(m, n) m * n = 10
    int main()
    {
    printf("in main\n");
    }

A	In main
B	Compilation error as lvalue is required for the expression m*n=10
C	Preprocessor error as lvalue is required for the expression m*n=10
D	None of the mentioned

Question 5

C preprocessor is conceptually the first step during compilation

A	true
B	false
C	Depends on the compiler
D	Depends on the standard

Question 6

Preprocessor feature that supply line numbers and filenames to compiler is called?

A	Selective inclusion
B	macro substitution
C	Concatenation
D	Line control

Question 7

#include are _______ files and #include “somefile.h” ________ files.

A	Library, Library
B	Library, user-created header
C	User-created header, library
D	They can include all types of file

Question 8

A preprocessor is a program

A	That processes its input data to produce output that is used as input to another program
B	That is nothing but a loader
C	That links various source files
D	All of the mentioned

Question 9

Which of the following are C preprocessors?

A	#ifdef
B	#define
C	#endif
D	All of the mentioned

Question 10

#include statement must be written

A	Before main()
B	Before any scanf/printf
C	After main()
D	It can be written anywhere

Question 11

#pragma exit is primarily used for?

A	Checking memory leaks after exitting the program
B	Informing Operating System that program has terminated
C	Running a function at exitting the program
D	No such preprocessor exist

Question 12

What is the output of this C code?

    #include 
    int main()
    {
    int one = 1, two = 2;
    #ifdef next
    one = 2;
    two = 1;
    #endif
    printf("%d, %d", one, two);
    }

A	1, 1
B	1, 2
C	2, 1
D	2, 2

Question 13

The C-preprocessors are specified with _________symbol.

A	#
B	$
C	” ”
D	None of the mentioned

Question 14

The #include directive

A	Tells the preprocessor to grab the text of a file and place it directly into the current file
B	Statements are typically placed at the top of a program
C	both a & b
D	None of a & b

Question 15

The preprocessor provides the ability for _______________.

A	The inclusion of header files
B	The inclusion of macro expansions
C	Conditional compilation and line control.
D	All of the mentioned

Question 16

If #include is used with file name in angular brackets

A	The file is searched for in the standard compiler include paths
B	The search path is expanded to include the current source directory
C	Both a & b
D	None of the mentioned