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C Programming :: Library Functions

Library Functions - General Questions
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Library Functions - Find Output of Program
Library Functions - True / False Questions

  1. What will be the output of the program?

     #include 

 int main()
 {   
     int i;   
     i = printf("How r u\n");     
     i = printf("%d\n", i);     
     printf("%d\n", i); 
     return 0; 
 }

    2. A.

    How r u
    7
    2
    B.

    How r u
    8
    2
    C.

    How r u
    1
    1
    D.

    Error: cannot assign printf to variable

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  2. What will be the output of the program?

     #include
 #include<math.h></span> 

  int main() 
  {    
      float i = 2.5;    
      printf("%f, %d", floor(i), ceil(i));     
      return 0;
  }

    3. A.

    2, 3
    B.

    2.000000, 3
    C.

    2.000000, 0
    D.

    2, 0

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  3. What will be the output of the program?

     #include 
  int main()
  {    
      int i;    
      i = scanf("%d %d", &i, &i);       
      printf("%d\n", i); 
      return 0; 
  }

    4. A.

    1
    B.

    2
    C.

    Garbage value
    D.

    Error: cannot assign scanf to variable

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  4. What will be the output of the program?

      #include
  int main()
  {    
     int i;   
     char c;  
     for(i=1; i5; i++)   
     {        
        scanf("%c", &c); /* given input is 'b' */         
       ungetc(c, stdout);           
       printf("%c", c);         
       ungetc(c, stdin);   
    }    
    return 0;
 }

    5. A.

    bbbb
    B.

    bbbbb
    C.

    b
    D.

    Error in ungetc statement.

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  5. What will be the output of the program?

     #include
 #include 

  int main() 
  {     
      char *i = "55.555";   
      int result1 = 10;  
      float result2 = 11.111;      
      result1 = result1+atoi(i);     
      result2 = result2+atof(i);     
      printf("%d, %f", result1, result2);  
      return 0; 
 }

    6. A.

    55, 55.555
    B.

    66, 66.666600
    C.

    65, 66.666000
    D.

    55, 55

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  6. What will be the output of the program?

     #include
 #include 

 int main() 
 {   
      char dest[] = {97, 97, 0};      
      char src[] = "aaa";  
      int i;  
      if((i = memcmp(dest, src, 2))==0)      
       printf("Got it");     
   else         
        printf("Missed");     
    return 0;
 }

    7. A.

    Missed
    B.

    Got it
    C.

    Error in memcmp statement
    D.

    None of above

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  7. What will function gcvt() do?

    8. A.
    Convert vector to integer value
    B.
    Convert floating-point number to a string
    C.
    Convert 2D array in to 1D array.
    D.
    Covert multi Dimensional array to 1D array

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  8. What will be the output of the program?

     #include 
 int main() 
 {  
     int i;  
     char c;    
     for(i=1; i5; i++)    
     {      
        scanf("%c", &c); /* given input is 'a' */      
        printf("%c", c);         
        ungetc(c, stdin);  
   }   
   return 0; 
}

    9. A.

    aaaa
    B.

    aaaaa
    C.

    Garbage value.
    D.

    Error in ungetc statement.

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