Structure and Union - C Programming MCQ Questions and Answers Page-7 section-1

61.

In the following C code, we can access the 1st character of the string sval by using . . . . . .

#include <stdio.h>
struct
{
    char *name;
    union
    {
        char *sval;
    } u;
} symtab[10];

. .

A. *symtab[i].u.sval

B. symtab[i].u.sval[0].

C. You cannot have union inside structure

D. Both *symtab[i].u.sval & symtab[i].u.sval[0].

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62.

What will be the output of the following C code?

#include <stdio.h>
struct point
{
    int x;
    int y;
};
struct notpoint
{
    int x;
    int y;
};
int main()
{
    struct point p = {1};
    struct notpoint p1 = p;
    printf("%d\n", p1.x);
}

A. Compile time error

B. 1

C. 0

D. Undefined

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63.

What will be the output of the following C code?

#include <stdio.h>
struct student
{
    char *c;
};
void main()
{
    struct student m;
    struct student *s = &m;
    s->c = "hello";
    printf("%s", m.c);
}

A. Run time error

B. Nothing

C. hello

D. Varies

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64.

What will be the output of the following C code?

#include <stdio.h>
struct student
{
    char *c;
    struct student *point;
};
void main()
{
    struct student s;
    printf("%d", sizeof(s));
}

A. 5

B. 9

C. 8

D. 16

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65.
What is typedef declaration?

A. Does not create a new type

B. It merely adds a new name for some existing type

C. Does not create a new type, It merely adds a new name for some existing type

D. None of the mentioned

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66.

Which of the following is an incorrect syntax for pointer to structure?

(Assuming struct temp{int b;}*my_struct;)

A. *my_struct.b = 10;

B. (*my_struct).b = 10;

C. my_struct->b = 10;

D. Both *my_struct.b = 10; and (*my_struct).b = 10;

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67.
The size of a union is determined by the size of the . . . . . . . .

A. First member in the union

B. Last member in the union

C. Biggest member in the union

D. Sum of the sizes of all members

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68.

What will be the output of the following C code?

#include <stdio.h>
struct p
{
    int x;
    char y;
};
typedef struct p* q*;
int main()
{
    struct p p1[] = {1, 92, 3, 94, 5, 96};
    q ptr1 = p1;
    printf("%d\n", ptr1->x);
}

A. Compile time error

B. 1

C. Undefined behaviour

D. Segmentation fault

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69.
Which of the following is not possible regarding the structure variable?

A. A structure variable pointing to itself

B. A structure variable pointing to another structure variable of same type

C. 2 different type of structure variable pointing at each other

D. None of the mentioned

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70.

What will be the output of the following C code? (Assuming size of int be 4)

#include <stdio.h>
struct temp
{
    int a;
    int b;
    int c;
} p[] = {0};
main()
{
    printf("%d", sizeof(p));
}

A. 4

B. 12

C. 16

D. Can't be estimated due to ambiguous initialization of array

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61.
In the following C code, we can access the 1st character of the string sval by using . . . . . .

`#include <stdio.h> struct { char name; union { char sval; } u; } symtab[10];`
. .

Answer & Solution

62.
What will be the output of the following C code?

`#include <stdio.h> struct point { int x; int y; }; struct notpoint { int x; int y; }; int main() { struct point p = {1}; struct notpoint p1 = p; printf("%d\n", p1.x); }`

Answer & Solution

63.
What will be the output of the following C code?

`#include <stdio.h> struct student { char c; }; void main() { struct student m; struct student s = &m; s->c = "hello"; printf("%s", m.c); }`

Answer & Solution

64.
What will be the output of the following C code?

`#include <stdio.h> struct student { char c; struct student point; }; void main() { struct student s; printf("%d", sizeof(s)); }`

Answer & Solution

65.
What is typedef declaration?

Answer & Solution

66.
Which of the following is an incorrect syntax for pointer to structure?

`(Assuming struct temp{int b;}*my_struct;)`

Answer & Solution

67.
The size of a union is determined by the size of the . . . . . . . .

Answer & Solution

68.
What will be the output of the following C code?

`#include <stdio.h> struct p { int x; char y; }; typedef struct p* q*; int main() { struct p p1[] = {1, 92, 3, 94, 5, 96}; q ptr1 = p1; printf("%d\n", ptr1->x); }`

Answer & Solution

69.
Which of the following is not possible regarding the structure variable?

Answer & Solution

70.
What will be the output of the following C code? (Assuming size of int be 4)

`#include <stdio.h> struct temp { int a; int b; int c; } p[] = {0}; main() { printf("%d", sizeof(p)); }`

Answer & Solution

Read More Section(Structure and Union)

Structure and Union - C Programming MCQ Questions and Answers

61. In the following C code, we can access the 1st character of the string sval by using . . . . . . #include <stdio.h> struct { char *name; union { char *sval; } u; } symtab[10];. .

Answer & Solution

62. What will be the output of the following C code? #include <stdio.h> struct point { int x; int y; }; struct notpoint { int x; int y; }; int main() { struct point p = {1}; struct notpoint p1 = p; printf("%d\n", p1.x); }

Answer & Solution

63. What will be the output of the following C code? #include <stdio.h> struct student { char *c; }; void main() { struct student m; struct student *s = &m; s->c = "hello"; printf("%s", m.c); }

Answer & Solution

64. What will be the output of the following C code? #include <stdio.h> struct student { char *c; struct student *point; }; void main() { struct student s; printf("%d", sizeof(s)); }

Answer & Solution

65. What is typedef declaration?

Answer & Solution

66. Which of the following is an incorrect syntax for pointer to structure? (Assuming struct temp{int b;}*my_struct;)

Answer & Solution

67. The size of a union is determined by the size of the . . . . . . . .

Answer & Solution

68. What will be the output of the following C code? #include <stdio.h> struct p { int x; char y; }; typedef struct p* q*; int main() { struct p p1[] = {1, 92, 3, 94, 5, 96}; q ptr1 = p1; printf("%d\n", ptr1->x); }

Answer & Solution

69. Which of the following is not possible regarding the structure variable?

Answer & Solution

70. What will be the output of the following C code? (Assuming size of int be 4) #include <stdio.h> struct temp { int a; int b; int c; } p[] = {0}; main() { printf("%d", sizeof(p)); }

Answer & Solution

Read More Section(Structure and Union)

61.
In the following C code, we can access the 1st character of the string sval by using . . . . . .

`#include <stdio.h> struct { char name; union { char sval; } u; } symtab[10];`
. .

62.
What will be the output of the following C code?

`#include <stdio.h> struct point { int x; int y; }; struct notpoint { int x; int y; }; int main() { struct point p = {1}; struct notpoint p1 = p; printf("%d\n", p1.x); }`

63.
What will be the output of the following C code?

`#include <stdio.h> struct student { char c; }; void main() { struct student m; struct student s = &m; s->c = "hello"; printf("%s", m.c); }`

64.
What will be the output of the following C code?

`#include <stdio.h> struct student { char c; struct student point; }; void main() { struct student s; printf("%d", sizeof(s)); }`

65.
What is typedef declaration?

66.
Which of the following is an incorrect syntax for pointer to structure?

`(Assuming struct temp{int b;}*my_struct;)`

67.
The size of a union is determined by the size of the . . . . . . . .

68.
What will be the output of the following C code?

`#include <stdio.h> struct p { int x; char y; }; typedef struct p* q*; int main() { struct p p1[] = {1, 92, 3, 94, 5, 96}; q ptr1 = p1; printf("%d\n", ptr1->x); }`

69.
Which of the following is not possible regarding the structure variable?

70.
What will be the output of the following C code? (Assuming size of int be 4)

`#include <stdio.h> struct temp { int a; int b; int c; } p[] = {0}; main() { printf("%d", sizeof(p)); }`