250+ TOP MCQs on Initialization of Pointer Arrays and Answers [2024]

C quiz on “Initialization of Pointer Arrays”. One shall practice these quizzes to improve their C programming skills needed for various interviews (campus interviews, walkin interviews, company interviews), placements, entrance exams and other competitive exams. These questions can be attempted by anyone focusing on learning C Programming language. They can be a beginner, fresher, engineering graduate or an experienced IT professional. Our C quiz comes with detailed explanation of the answers which helps in better understanding of C concepts.

Here is a listing of C quiz on “Initialization of Pointer Arrays” along with answers, explanations and/or solutions:

1. Which of the following is the correct syntax to declare a 3 dimensional array using pointers?
a) char *a[][];
b) char **a[];
c) char ***a;
d) all of the mentioned
Answer: a
Clarification: None.

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

```
    #include 
```
```
    int main()
```
```
    {
```

        char *a = {"p", "r", "o", "g", "r", "a", "m"};

```
        printf("%s", a);
```
```
    }
```

a) Output will be program
b) Output will be p
c) No output
d) Compile-time error
Answer: b
Clarification: None.

3. An array of strings can be initialized by _________
a) char *a[] = {“Hello”, “World”};
b) char *a[] = {“Hello”, “Worlds”};
c)

char *b = "Hello";
char *c = "World";
char *a[] = {b, c};

d) all of the mentioned
Answer: d
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```

        char *a[10] = {"hi", "hello", "how"};

```
        int i = 0;
```
```
        for (i = 0;i < 10; i++)
```
```
        printf("%s", *(a[i]));
```
```
    }
```

a) segmentation fault
b) hi hello how followed by 7 null values
c) 10 null values
d) depends on compiler
Answer: a
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```

        char *a[10] = {"hi", "hello", "how"};

```
        int i = 0, j = 0;
```
```
        a[0] = "hey";
```
```
        for (i = 0;i < 10; i++)
```
```
        printf("%sn", a[i]);
```
```
    }
```

a) hi hello how Segmentation fault
b) hi hello how followed by 7 null values
c) hey hello how Segmentation fault
d) depends on compiler
Answer: c
Clarification: None.

6. What will be the output of the following C code on a 32-bit system?

```
    #include 
```
```
    void main()
```
```
    {
```

        char *a[10] = {"hi", "hello", "how"};

```
        printf("%dn", sizeof(a));
```
```
    }
```

a) 10
b) 13
c) Run time error
d) 40
Answer: d
Clarification: If the system is 32-bit system, then the size of pointer will be 4 bytes. For such a system, the size of array a will be 4×10 = 40 bytes. The size of pointer is 8 bytes on a 64 bit system. For the given array a of 10 elements, it will be 8×10 = 80 bytes.

7. What will be the output of the following C code on a 32-bit system?

```
    #include 
```
```
    void main()
```
```
    {
```

        char *a[10] = {"hi", "hello", "how"};

```
        printf("%dn", sizeof(a[1]));
```
```
    }
```

a) 6
b) 4
c) 5
d) 3
Answer: b
Clarification: Array element a[1] is storing an address of character pointer. For a 32-bit systems its 4 bytes and for a 64-bit system, its 8 bytes.

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

```
    #include 
```
```
    void main()
```
```
    {
```

        char *a[10] = {"hi", "hello", "how"};

```
        int i = 0;
```
```
        for (i = 0;i < 10; i++)
```
```
        printf("%s", a[i]);
```
```
    }
```

a) hi hello how Segmentation fault
b) hi hello how null
c) hey hello how Segmentation fault
d) hi hello how followed by 7 nulls
Answer: d
Clarification: None.

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