C Programming Questions and Answers – File Inclusion

C Programming Questions and Answers – File Inclusion

1.What is the sequence for preprocessor to look for the file within <> ?

a) The predefined location then the current directory

b) The current directory then the predefined location

c) The predefined location only

d) The current directory location

2.Which directory the compiler first looks for the file when using #include ?

a) Current directory where program is saved

b) C:COMPILERINCLUDE

c) S:SOURCEHEADERS

d) Both (b) and (c) simultaneously

3.What would happen if you create a file stdio.h and use #include “stdio.h” ?

a) The predefined library file will be selected

b) The user-defined library file will be selected

c) Both the files will be included

d) The compiler won’t accept the program

4.How is search done in #include and #include “somelibrary.h” according to C standard?

a) When former is used, current directory is searched and when latter is used, standard directory is searched

b) When former is used, standard directory is searched and when latter is used, current directory is searched

c) When former is used, search is done in implementation defined manner and when latter is used, current directory is searched

d) For both, search for ‘somelibrary’ is done in implementation-defined places

5.How is search done in #include and #include”somelibrary.h” normally or conventionally?

a) When former is used, current directory is searched and when latter is used, standard directory is searched

b) When former is used, predefined directory is searched and when latter is used, current directory is searched and then predefined directories are searched

c) When former is used, search is done in implementation defined manner and latter is used to search current directory

d) For both, search for somelibrary is done in implementation-defined manner

6.Can function definition be present in header files?

a) Yes

b) No

c) Depends on the compiler

d) Depends on the standard

7.Comment on the output of this C code?

#include <stdio.h>

#include “test.h”

#include “test.h”

int main()

{

//some code

}

a) true

b) Compile time error

c) false

d) Depends on the compiler

8.What is the output of this C code?

#include <stdio.h>

#define foo(m, n) m ## n

void myfunc();

int main()

{

myfunc();

}

void myfunc()

{

printf(“%d\n”, foo(2, 3));

}

a) 23

b) 2 3

c) Compile time error

d) Undefined behaviour

9.If the file name is enclosed in double quotation marks

a) The preprocessor treats it as a user-defined file

b) The preprocessor treats it as a system-defined file

c) Both a & b

d) None of the mentioned

10.If the file name is enclosed in angle brackets

a) The preprocessor treats it as a user-defined file

b) The preprocessor treats it as a system-defined file

c) Both a & b

d) None of the mentioned

11.What is the output of this C code?

#include (stdio.h)

void main()

{

printf(“hello”);

}

a) hello

b) Nothing

c) compile time error

d) Depends on compiler

12.The below two lines are equivalent to

#define C_IO_HEADER

#include C_IO_HEADER

a) #include

b) #include”printf”

c) #include”C_IO_HEADER”

d) #include

13.What is the output of this C code?

#include <stdio.h>

#include “printf”

void main()

{

printf(“hello”);

}

a) hello

b) Error

c) Depends on compiler

d) Varies

14.Which of the following file extensions are accepted with #include?

a) .h

b) .in

c) .com

d) All of the mentioned

15.Which of the following names for files not accepted?

a) header.h.h

b) 123header.h

c) _head_er.h

d) None of the mentioned