C Programming Questions and Answers on Multidimensional Arrays for Freshers
https://www.computersprofessor.com/2017/11/c-programming-questions-and-answers-on_20.html
1. What is the output of this C code?
#includevoid main()
{int a[2][3] = {1, 2, 3, 4, 5};
int i = 0, j = 0;
for (i = 0; i < 2; i++)
for (j = 0; j < 3; j++)
printf("%d", a[i][j]);
}
a) 1 2 3 4 5 0
b) 1 2 3 4 5 junk
c) 1 2 3 4 5 5
d) Run time error
b) 1 2 3 4 5 junk
c) 1 2 3 4 5 5
d) Run time error
Answer: a
2. What is the output of this C code?
#includevoid main()
{int a[2][3] = {1, 2, 3, , 4, 5};
int i = 0, j = 0;
for (i = 0; i < 2; i++)
for (j = 0; j < 3; j++)
printf("%d", a[i][j]);
}
a) 1 2 3 junk 4 5
b) Compile time error
c) 1 2 3 0 4 5
d) 1 2 3 3 4 5
b) Compile time error
c) 1 2 3 0 4 5
d) 1 2 3 3 4 5
Answer: b
3. What is the output of this C code?
#includevoid f(int a[][3])
{a[0][1] = 3;
int i = 0, j = 0;
for (i = 0; i < 2; i++)
for (j = 0; j < 3; j++)
printf("%d", a[i][j]);
}void main()
{int a[2][3] = {0};
f(a);
}
a) 0 3 0 0 0 0
b) Junk 3 junk junk junk junk
c) Compile time error
d) All junk values
b) Junk 3 junk junk junk junk
c) Compile time error
d) All junk values
Answer: a
4. What is the output of this C code?
#includevoid f(int a[][])
{a[0][1] = 3;
int i = 0, j = 0;
for (i = 0;i < 2; i++)
for (j = 0;j < 3; j++)
printf("%d", a[i][j]);
}void main()
{int a[2][3] = {0};
f(a);
}
a) 0 3 0 0 0 0
b) Junk 3 junk junk junk junk
c) Compile time error
d) All junk values
b) Junk 3 junk junk junk junk
c) Compile time error
d) All junk values
Answer: c
5. What is the output of this C code?
#includevoid f(int a[2][])
{a[0][1] = 3;
int i = 0, j = 0;
for (i = 0;i < 2; i++)
for (j = 0;j < 3; j++)
printf("%d", a[i][j]);
}void main()
{int a[2][3] = {0};
f(a);
}
a) 0 3 0 0 0 0
b) Junk 3 junk junk junk junk
c) Compile time error
d) All junk values
b) Junk 3 junk junk junk junk
c) Compile time error
d) All junk values
Answer: c
6. Comment on the following statement:
int (*a)[7];
int (*a)[7];
a) An array “a” of pointers.
b) A pointer “a” to an array.
c) A ragged array.
d) None of the mentioned
Answer: b
7. Comment on the 2 arrays regarding P and Q:
int *a1[8];
int *(a3[8]);
P. Array of pointersQ. Pointer to an array
a) a1 is P, a2 is Q
b) a1 is P, a2 is P
c) a1 is Q, a2 is P
d) a1 is Q, a2 is Q
b) a1 is P, a2 is P
c) a1 is Q, a2 is P
d) a1 is Q, a2 is Q
Answer: b
8. Which of the following is not possible statically in C?
a) Jagged Array
b) Rectangular Array
c) Cuboidal Array
d) Multidimensional Array
Answer: a
9. What is the correct syntax to send a 3-dimensional array as a parameter?
(Assuming declaration int a[5][4][3];)
a) func(a);
b) func(&a);
c) func(*a);
d) func(**a);
(Assuming declaration int a[5][4][3];)
a) func(a);
b) func(&a);
c) func(*a);
d) func(**a);
Answer: a
10. Applications of multidimensional array are?
a) Matrix-Multiplication
b) Minimum Spanning Tree
c) Finding connectivity between nodes
d) All of the mentioned
a) Matrix-Multiplication
b) Minimum Spanning Tree
c) Finding connectivity between nodes
d) All of the mentioned
Answer: d
11. What is the output of this C code?
#includeint main()
{int ary[2][3];
foo(ary);
}void foo(int *ary[])
{int i = 10, j = 2, k;
ary[0] = &i;
ary[1] = &j;
*ary[0] = 2;
for (k = 0;k < 2; k++)
printf("%d\n", *ary[k]);
}
a) 2 2
b) Compile time error
c) Undefined behaviour
d) 10 2
b) Compile time error
c) Undefined behaviour
d) 10 2
Answer: a
12. What is the output of this C code?
#includeint main()
{int ary[2][3];
foo(ary);
}void foo(int (*ary)[3])
{int i = 10, j = 2, k;
ary[0] = &i;
ary[1] = &j;
for (k = 0;k < 2; k++)
printf("%d\n", *ary[k]);
}
a) Compile time error
b) 10 2
c) Undefined behaviour
d) segmentation fault/code crash
b) 10 2
c) Undefined behaviour
d) segmentation fault/code crash
Answer: a
13. What is the output of this C code?
#includeint main()
{foo(ary);
}void foo(int **ary)
{int i = 10, k = 10, j = 2;
int *ary[2];
ary[0] = &i;
ary[1] = &j;
printf("%d\n", ary[0][1]);
}
a) 10
b) 2
c) Compile time error
d) Undefined behaviour
b) 2
c) Compile time error
d) Undefined behaviour
Answer: d
14. What is the output of this C code?
#includeint main()
{int ary[2][3][4], j = 20;
ary[0][0] = &j;
printf("%d\n", *ary[0][0]);
}
a) Compile time error
b) 20
c) Address of j
d) Undefined behaviour
b) 20
c) Address of j
d) Undefined behaviour
Answer: a
15. What is the output of this C code?
#includeint main()
{int ary[2][3];
ary[][] = {{1, 2, 3}, {4, 5, 6}};
printf("%d\n", ary[1][0]);
}
a) Compile time error
b) 4
c) 1
d) 2
b) 4
c) 1
d) 2
Answer: a
