Pointers Vs. Multi-dimensional Arrays - C Language Questions and Answers

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Pointers Vs. Multi-dimensional Arrays – 2”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

1. What will be the output of the following C code (considering sizeof char is 1 and pointer is 4)?

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        char *a[2] = {"hello", "hi"};
```
```
        printf("%d", sizeof(a));
```
```
        return 0;
```
```
    }
```

a) 9
b) 4
c) 8
d) 10
View Answer

Answer: c
Explanation: None.

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

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```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        char a[2][6] = {"hello", "hi"};
```
```
        printf("%d", sizeof(a));
```
```
        return 0;
```
```
    }
```

a) 9
b) 12
c) 8
d) 10
View Answer

Answer: b
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        char a[2][6] = {"hello", "hi"};
```
```
        printf("%s", *a + 1);
```
```
        return 0;
```
```
    }
```

a) hello
b) hi
c) ello
d) ello hi
View Answer

Answer: c
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        char *a[2] = {"hello", "hi"};
```
```
        printf("%s", *(a + 1));
```
```
        return 0;
```
```
    }
```

a) hello
b) ello
c) hi
d) ello hi
View Answer

Answer: c
Explanation: None.

5. What is the advantage of a multidimensional array over pointer array?
a) Predefined size
b) Input can be taken from user
c) Faster Access
d) All of the mentioned
View Answer

Answer: d
Explanation: None.

6. Which of the following operation is possible using a pointer char? (Assuming the declaration is char *a;)
a) Input via %s
b) Generation of the multidimensional array
c) Changing address to point at another location
d) All of the mentioned
View Answer

Answer: c
Explanation: None.

7. Comment on the following two operations.

    int *a[] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 1
    int b[4][4] = {{1, 2, 3}, {1, 2, 3, 4}};//- 2

a) 1 will work, 2 will not
b) 1 and 2, both will work
c) 1 won’t work, 2 will work
d) Neither of them will work
View Answer

Answer: c
Explanation: None.

8. Comment on the following two operations.

    int *a[] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 1
    int b[][] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 2

a) 1 works, 2 doesn’t
b) 2 works, 1 doesn’t
c) Both of them work
d) Neither of them work
View Answer

Answer: d
Explanation: None.

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