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Structures, Unions, Enums Questions

NA
SHSTTON
41
Solv. Corr.
40
Solv. In. Corr.
81
Attempted
0 M:0 S
Avg. Time

11 / 43

What is the output of the following 'C' program?
#include<stdio.h>
struct point
{
int x;
int y;
};
struct point origin,*pp; 
int main()
{
pp=&origin;
printf("origin is(%d%d)\n",(*pp).x,(*pp).y);
printf("origin is (%d%d)\n",pp->x,pp->y);
return 0;
}

ACompilation Error

Borigin is(1,1) origin is(1,1)

Corigin is(0,0) origin is(0,0)

DNone of these

Answer: Option C

Explanation:

pp is a pointer to structure. we can access the elements of the structure either with arrow mark or with indirection operator.
Since structure point is globally declared x & y are initialized as zeroes

Workspace

NA
SHSTTON
23
Solv. Corr.
122
Solv. In. Corr.
145
Attempted
0 M:0 S
Avg. Time

12 / 43

What is the output of the following 'C' program?
#include<stdio.h>
void main()
{
struct emp
{
char name [20];
int age;
float sal;
};
struct emp e = {"Tiger"};
printf("\n%d %f", e.age, e.sal);
}

AError

B0

CGarbage values

D1 0.000000

Answer: Option B

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
28
Solv. Corr.
47
Solv. In. Corr.
75
Attempted
0 M:10 S
Avg. Time

13 / 43

What error are you likely to get when you run the following program?
#include<stdio.h>
void main()                                                                     {
struct emp
{
char name[20];
float sal;
};
struct emp e[10];
int i;
for(i=0;i <= 1; i++)
scanf("%s%f", e[i].name, & e[i].sal);
}

ASuspicious pomter conversion

BCannot use scanf() for structures

CStrings cannot be nested inside structures

DNo Error

Answer: Option D

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
12
Solv. Corr.
42
Solv. In. Corr.
54
Attempted
1 M:3 S
Avg. Time

14 / 43

What is the output of the following program ?
#include<stdio.h>
struct aaa{
struct aaa *prev;
int i;
struct aaa *next;
};
void main()
{
struct aaa abc,def,ghi,jkl;
int x=100;
abc.i=0;
abc.prev=&jkl;
abc.next=&def;
def.i=1;def.prev=&abc;
def.next=&ghi;
ghi.i=2;ghi.prev=&def;
ghi.next=&jkl; jkl.i=3;
jkl.prev=&ghi;
jkl.next=&abc;
x=abc.next->next->prev->next->i;
printf("%d",x);
}

A4

B3

CCompilation Error

D2

ENone of these

Answer: Option D

Explanation:

above all statements form a double circular linked list;

abc.next->next->prev->next->i

this one points to "ghi" node the value of at particular node is 2.

Workspace

NA
SHSTTON
25
Solv. Corr.
47
Solv. In. Corr.
72
Attempted
0 M:0 S
Avg. Time

15 / 43

What is the output of the following program ?
#include<stdio.h>
void main()
{
enum {i=10,j=20,k=50};
printf("%d",++k);
}

ACompilaiton Error: Lvalue required

B51

C50

DNone of these

Answer: Option A

Explanation:

Enumeration constants cannot be modified, so you cannot apply ++.

Workspace

NA
SHSTTON
41
Solv. Corr.
30
Solv. In. Corr.
71
Attempted
0 M:0 S
Avg. Time

16 / 43

What is the output for the program given below
#include<stdio.h>
typedef enum errorType{warning, error, exception,}error;
void main()
{
error g1;
g1=1;
printf("%d",g1);
}

A3

B2

C1

Derror: ‘error’ redeclared as different kind of symbol

ENone of these

Answer: Option D

Explanation:

previous definition of "error" is in the below line.
typedef enum errorType{warning, error, exception,}error;
^

Workspace

NA
SHSTTON
38
Solv. Corr.
27
Solv. In. Corr.
65
Attempted
0 M:0 S
Avg. Time

17 / 43

What is the output of the following program ?
#include<stdio.h>
typedef struct error 
{ 
int warning, error, exception;
}error;
void main()
{
error g1;
g1.error=1;  
printf("%d",g1.error);
}

A1

BCompilation Error

C0

D2

ENone of these

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
33
Solv. Corr.
31
Solv. In. Corr.
64
Attempted
0 M:0 S
Avg. Time

18 / 43

What will be output of the following "c" code?
#include<stdio.h> 
void main()
{
struct date;
struct student
{
char name[30];
int rollno; 
struct date dob;
}stud;

struct date
{ 
int day,month,year;
};
scanf("%s%d%d%d",stud.rollno,&student.dob.day,&student.dob.month,&student.dob.year);
}

ANo Output No Error

BCompiler Error: Undefined structure date

Cwill take the given input

DNone of these

Answer: Option B

Explanation:

Only declaration of struct date is available inside the structure definition of 'student' but to have a variable of type struct date the definition of the structure is required.

Workspace

NA
SHSTTON
11
Solv. Corr.
49
Solv. In. Corr.
60
Attempted
0 M:0 S
Avg. Time

19 / 43

What is the output of the following 'C' program ?

#include<stdio.h>
int main()
{
struct sample
{
int a:6; 
int b:12; 
char s;
}st;

struct name
{
int a:28; 
int b:12; 
char ch;
}st1;

printf("%d %d",sizeof(st),sizeof(st1));
return 0;
}
Note: int takes 4 bytes, char takes 1 byte. ?

A4 8

B4 4

C8 8

D12 12

E8 4

Answer: Option A

Explanation:

Here is no explanation for this answer

Workspace

NA
SHSTTON
23
Solv. Corr.
32
Solv. In. Corr.
55
Attempted
0 M:0 S
Avg. Time

20 / 43

What will be the size of these structures?
#include <stdio.h>
struct S1 {
char c;
int i[2]; 
double v;
} SA1;
struct S2 {
double x;
int i[2];
char c;
} SA2;
int main()
{
printf("\n sizeof S1 %d : Sizeof S2 %d ",sizeof(SA1),sizeof(SA2));
return 0;
}
Note:char takes 1 byte, int takes 4 bytes, double takes 8 bytes

Asizeof S1 12 : Sizeof S2 12

Bsizeof S1 20 : Sizeof S2 20

Csizeof S1 13 : Sizeof S2 13

DCompilation Error

Answer: Option B

Explanation:

Here is no explanation for this answer

Workspace

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