C Programming Questions and Answers – Arrays of Structures
C Programming Questions and Answers – Arrays of Structures
1.The correct syntax to access the member of the ith structure in the array of structures is?
Assuming: struct temp
{
int b;
}s[50];
a) s.b.[i];
b) s.[i].b;
c) s.b[i];
d) s[i].b;
View Answer
Answer:d
2.Comment on the output of this C code?
#include <stdio.h>
struct temp
{
int a;
int b;
int c;
};
main()
{
struct temp p[] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
}
a) No Compile time error, generates an array of structure of size 3
b) No Compile time error, generates an array of structure of size 9
c) Compile time error, illegal declaration of a multidimensional array
d) Compile time error, illegal assignment to members of structure
View Answer
Answer:a
3.Which of the following uses structure?
a) Array of structures
b) Linked Lists
c) Binary Tree
d) All of the mentioned
View Answer
Answer:d
4.What is the correct syntax to declare a function foo() which receives an array of structure in function?
a) void foo(struct *var);
b) void foo(struct *var[]);
c) void foo(struct var);
d) None of the mentioned
View Answer
Answer:a
5.What is the output of this 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 ambigous initialization of array
View Answer
Answer:b
6.What is the output of this C code?
#include <stdio.h>
struct student
{
char *name;
};
struct student s[2];
void main()
{
s[0].name = “alan”;
s[1] = s[0];
printf(“%s%s”, s[0].name, s[1].name);
s[1].name = “turing”;
printf(“%s%s”, s[0].name, s[1].name);
}
a) alan alan alan turing
b) alan alan turing turing
c) alan turing alan turing
d) Run time error
View Answer
Answer:a
7.What is the output of this C code?
#include <stdio.h>
struct student
{
char *name;
};
struct student s[2], r[2];
void main()
{
s[0].name = “alan”;
s[1] = s[0];
r = s;
printf(“%s%s”, r[0].name, r[1].name);
}
a) alan alan
b) Compile time error
c) Varies
d) Nothing
View Answer
Answer:b
8.What is the output of this C code?
#include <stdio.h>
struct student
{
char *name;
};
void main()
{
struct student s[2], r[2];
s[1] = s[0] = “alan”;
printf(“%s%s”, s[0].name, s[1].name);
}
a) alan alan
b) Nothing
c) Compile time error
d) Varies
View Answer
Answer:c
9.What is the output of this C code?
#include <stdio.h>
struct student
{
};
void main()
{
struct student s[2];
printf(“%d”, sizeof(s));
}
a) 2
b) 4
c) 8
d) 0
View Answer
Answer:d
10.What is the output of this C code?
#include <stdio.h>
struct point
{
int x;
int y;
};
void foo(struct point*);
int main()
{
struct point p1[] = {1, 2, 3, 4};
foo(p1);
}
void foo(struct point p[])
{
printf(“%d\n”, p[1].x);
}
a) Compile time error
b) 3
c) 2
d) 1
View Answer
Answer:b
11.What is the output of this C code?
#include <stdio.h>
struct point
{
int x;
int y;
};
void foo(struct point*);
int main()
{
struct point p1[] = {1, 2, 3, 4};
foo(p1);
}
void foo(struct point p[])
{
printf(“%d\n”, p->x);
}
a) 1
b) 2
c) 3
d) Compile time error
View Answer
Answer:a
12.What is the output of this C code?
#include <stdio.h>
struct point
{
int x;
int y;
};
void foo(struct point*);
int main()
{
struct point p1[] = {1, 2, 3, 4};
foo(p1);
}
void foo(struct point p[])
{
printf(“%d %d\n”, p->x, ++p->x);
}
a) 1 2
b) 2 2
c) Compile time error
d) Undefined behaviour
View Answer
Answer:b
13.What is the output of this C code?
#include <stdio.h>
struct point
{
int x;
int y;
} p[] = {1, 2, 3, 4, 5};
void foo(struct point*);
int main()
{
foo(p);
}
void foo(struct point p[])
{
printf(“%d %d\n”, p->x, p[2].y);
}
a) 1 0
b) Compile time error
c) 1 somegarbagevalue
d) Undefined behaviour
View Answer
Answer:a
14.What is the output of this C code?
#include <stdio.h>
struct point
{
int x;
int y;
};
void foo(struct point*);
int main()
{
struct point p1[] = {1, 2, 3, 4, 5};
foo(p1);
}
void foo(struct point p[])
{
printf(“%d %d\n”, p->x, p[3].y);
}
a) Compile time error
b) 1 0
c) 1 somegarbagevalue
d) None of the mentioned
View Answer
Answer:c
15.What is the output of this C code?
#include <stdio.h>
struct point
{
int x;
int y;
};
void foo(struct point*);
int main()
{
struct point p1[] = {1, 2, 3, 4, 5};
foo(p1);
}
void foo(struct point p[])
{
printf(“%d %d\n”, p->x, (p + 2).y);
}
a) Compile time error
b) 1 0
c) 1 somegarbagevalue
d) Undefined behaviour
View Answer
Answer:a
16.What is the output of this C code?
#include <stdio.h>
struct point
{
int x;
int y;
};
void foo(struct point*);
int main()
{
struct point p1[] = {1, 2, 3, 4, 5};
foo(p1);
}
void foo(struct point p[])
{
printf(“%d %d\n”, p->x, (p + 2)->y);
}
a) Compile time error
b) 1 0
c) 1 somegarbagevalue
d) undefined behaviour
View Answer
Answer:b
17.What is the output of this C code?
#include <stdio.h>
struct student
{
char *c;
};
void main()
{
struct student s[2];
printf(“%d”, sizeof(s));
}
a) 2
b) 4
c) 16
d) 8
View Answer
Answer:d
