C Programming -Initialization of Pointer Arrays

C Programming -Initialization of Pointer Arrays

Question 1

To declare a 3 dimension array using pointers, which of the following is the correct syntax:

A	char *a[][];
B	char **a[];
C	char ***a;
D	All of the mentioned

Question 2

Comment on the output of this 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

Question 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.

Question 4

What is the output of this 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

Question 5

What is the output of this 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("%s\n", 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

Question 6

What is the output of this C code?

    #include 
    void main()
    {
    char *a[10] = {"hi", "hello", "how"};
    printf("%d\n", sizeof(a));
    }

A	10
B	13
C	Run time error
D	40

Question 7

What is the output of this C code?

    #include 
    void main()
    {
    char *a[10] = {"hi", "hello", "how"};
    printf("%d\n", sizeof(a[1]));
    }

A	6
B	4
C	5
D	3

Question 8

What is the output of this 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

Question 9

What is the output of this C code?

    #include 
    int main()
    {
    char *p[1] = {"hello"};
    printf("%s", (p)[0]);
    return 0;
    }

A	Compile time error
B	Undefined behaviour
C	hello
D	None of the mentioned

Question 10

What is the output of this C code?

    #include 
    int main()
    {
    char **p = {"hello", "hi", "bye"};
    printf("%s", (p)[0]);
    return 0;
    }

A	Compile time error
B	Undefined behaviour
C	hello
D	Address of hello

Question 11

What is the output of this C code?

    #include 
    int main()
    {
    int i = 0, j = 1;
    int *a[] = {&i, &j};
    printf("%d", (*a)[0]);
    return 0;
    }

A	Compile time error
B	Undefined behaviour
C	0
D	Some garbage value

Question 12

What is the output of this C code?

    #include 
    int main()
    {
    int i = 0, j = 1;
    int *a[] = {&i, &j};
    printf("%d", *a[0]);
    return 0;
    }

A	Compile time error
B	Undefined behaviour
C	0
D	Some garbage value

Question 13

What is the output of this C code?

    #include 
    int main()
    {
    int i = 0, j = 1;
    int *a[] = {&i, &j};
    printf("%d", (*a)[1]);
    return 0;
    }

A	Compile time error
B	Undefined behaviour
C	1
D	Some garbage value

Question 14

Which of the following are generated from char pointer?

A	char *string = “Hello.”;
B	char *string; scanf(“%s”, string);
C	char string[] = “Hello.”;
D	Both (a) and (c).

Question 15

Which of the following declaration are illegal?

A	int a[][] = {{1, 2, 3}, {2, 3, 4, 5}};
B	int *a[] = {{1, 2, 3}, {2, 3, 4, 5}};
C	int a[4][4] = {{1, 2, 3}, {2, 3, 4, 5}};
D	Both (a) and (b).

Check Your Answers:

  1. A

  2. A

  3. D

  4. A

  5. C

  6. D

  7. B

  8. D

  9. C

10. B

11. C

12. C

13. D

14. A

15. A

 

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