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Structures, Unions, Enums - C Programming Questions and Answers

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C Programming :: Structures, Unions, Enums

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Structures, Unions, Enums - Yes / No Questions
Structures, Unions, Enums - Find Output of Program
Structures, Unions, Enums - True / False Questions
Structures, Unions, Enums - Point Out Correct Statements

  1. What will be the output of the program ?

     #include

  int main() 
  {   
      union a   
      {      
         int i;     
         char ch[2];   
      };     
      union a u;    
      u.ch[0]=3;     
      u.ch[1]=2;     
      printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i);     
     return 0;
 }

     

    2. A.

    3, 2, 515
    B.

    515, 2, 3
    C.

    3, 2, 5
    D.

    515, 515, 4

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  2. What will be the output of the program ?

    #include 
 int main() 
 {   
    struct value   
    {       
      int bit1:1;       
      int bit3:4;        
      int bit4:4;     
}bit={1, 2, 13};      

  printf("%d, %d, %d\n", bit.bit1,   
  bit.bit3, bit.bit4);     
  return 0; 
}

    3. A.

    1, 2, 13
    B.

    1, 4, 4
    C.

    -1, 2, -3
    D.

    -1, -2, -13

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  3. What will be the output of the program in 16 bit platform (Turbo C under DOS) ?

      #include
  
   int main()
   {   
      struct value  
      {       
          int bit1:1;     
          int bit3:4;        
          int bit4:4;    
   }bit;     
   printf("%d\n", sizeof(bit));     
   return 0;
 }

    4. A.

    1
    B.

    2
    C.

    4
    D.

    9

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  4. What will be the output of the program ?

    #include 
 int main()
 {
   enum days {MON=-1, TUE, WED=6, THU, FRI, SAT}; 
   printf("%d, %d, %d, %d, %d, %d\n", MON, TUE, WED, THU, FRI, SAT);      
   return 0;
 }

    5. A.

    -1, 0, 1, 2, 3, 4
    B.

    -1, 2, 6, 3, 4, 5
    C.

    -1, 0, 6, 2, 3, 4
    D.

    -1, 0, 6, 7, 8, 9

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  5. What will be the output of the program ?

      #include
  int main() 
  {  
    enum status {pass, fail, absent};      
    enum status stud1, stud2, stud3;     
    stud1 = pass;  
    stud2 = absent;  
    stud3 = fail;  
    printf("%d %d %d\n", stud1, stud2, stud3);  
   return 0; 
 }

    6. A.

    0, 1, 2
    B.

    1, 2, 3
    C.

    0, 2, 1
    D.

    1, 3, 2

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  6. What will be the output of the program ?

     #include
 
  int main() 
  {   
     int i=4, j=8;   
     printf("%d, %d, %d\n", i|j&j|i, i|j&j|i, i^j);     
     return 0;
  }

    7. A.

    12, 12, 12
    B.

    112, 1, 12
    C.

    32, 1, 12
    D.

    -64, 1, 12

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  7. What will be the output of the program in Turbo C (under DOS)?

    #include
  int main() 
  {  
       struct emp    
       {    
          char *n;     
          int age;   
      };    
      struct emp e1 = {"Dravid", 23};      
      struct emp e2 = e1;     
      strupr(e2.n);     
      printf("%s\n", e1.n);     
      return 0;
 }

    8. A.

    Error: Invalid structure assignment
    B.

    DRAVID
    C.

    Dravid
    D.

    No output

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  8. What will be the output of the program in 16-bit platform (under DOS)?

    
  #include
 
   int main() 
   {   
     struct node    
     {        
        int data;    
        struct node *link;     
    };       
    struct node *p, *q;  
    p= (struct node *) malloc(sizeof(struct node));  
    q = (struct node *) malloc(sizeof(struct node));     printf("%d, %d\n", sizeof(p), sizeof(q));  
    return 0; 
}

     

    9. A.

    2, 2
    B.

    8, 8
    C.

    5, 5
    D.

    4, 4

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  9. What will be the output of the program ?

    #include 
 int main() 
 {   
    enum days {MON=-1, TUE, WED=6, THU, FRI, SAT};    
    printf("%d, %d, %d, %d, %d, %d\n", ++MON, TUE, WED, THU, FRI, SAT);   
    return 0;
 }

    10. A.

    -1, 0, 1, 2, 3, 4
    B.

    Error
    C.

    0, 1, 6, 3, 4, 5
    D.

    0, 0, 6, 7, 8, 9

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  10. What will be the output of the program ?

    #include   
  
  struct course   
  {         
     int courseno;     
     char coursename[25];     
   };
 int main() 
 {   
    struct course c[] { {102,"Java"},                               
                      {103, "PHP"},                              
                      {104,"DotNet"};      

 printf("%d ", c[1].courseno);       
 printf("%s\n", (*(c+2)).coursename);       
 return 0; 
}

    11. A.

    103 DotNet
    B.

    102 Java
    C.

    103 PHP
    D.

    104 DotNet

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