Pointers Vs. Multi-dimensional Arrays Quiz Online Practice Test

1. What can be said about the declaration int a[10][20];?

2. What is accurate regarding the declaration int *b[10];?

3. What output will be produced by the following C code?
#include <stdio.h>
void main() {
char a[10][5] = {"hi", "hello", "fellows"};
printf("%s", a[2]);
}

4. What will be the result of executing the following C code?
#include <stdio.h>
void main() {
char a[10][5] = {"hi", "hello", "fellows"};
printf("%p\n", a);
printf("%p", a[0]);
}

5. What will be the result of the following C code?
#include <stdio.h>
void main() {
char a[10][5] = {"hi", "hello", "fellows"};
printf("%d", sizeof(a[1]));
}

6. What output can be expected from the following C code?
#include <stdio.h>
int main() {
char a[1][5] = {"hello"};
printf("%s", a[0]);
return 0;
}

7. What will be the result of executing the following C code?
#include <stdio.h>
int main() {
char *a[1] = {"hello"};
printf("%s", a[0]);
return 0;
}

8. Which of the following statements is correct regarding pointers and multi-dimensional arrays?
P. Refers to a pointer to an array
Q. Represents a multi-dimensional array

9. What will be the output of the following C code, given that the size of `char` is 1 byte and the size of a pointer is 4 bytes?
#include <stdio.h>
int main()
{
char *a[2] = {"hello", "hi"};
printf("%d", sizeof(a));
return 0;
}

10. What will be the output of the following C code snippet?
#include <stdio.h>
int main()
{
char a[2][6] = {"hello", "hi"};
printf("%d", sizeof(a));
return 0;
}

11. What will be the result of executing the following C code?
#include <stdio.h>
int main()
{
char a[2][6] = {"hello", "hi"};
printf("%s", *a + 1);
return 0;
}

12. What output will be produced by the following C code?
#include <stdio.h>
int main()
{
char *a[2] = {"hello", "hi"};
printf("%s", *(a + 1));
return 0;
}

13. What benefits does a multidimensional array offer compared to a pointer array?

14. Which operations can be performed using a char pointer, given the declaration `char *a;`?

15. Analyze the following two declarations:
int *a[] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 1
int b[4][4] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 2
What can be said about their validity?

16. Evaluate the following two statements regarding their validity:
int *a[] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 1
int b[][] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 2