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# C Programming MCQ - Pointers

21:

Consider the declarations
char first (int (*) (char, float)) ;
int second(char, float);

Which of the following function invocation is valid?

 A. first (*second) ; B. first (&second); C. first (second); D. none of the above Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here:
22:

A function q that accepts a pointer to a character as argument and returns a pointer to an array of integer can be declared as

 A. int (*q (char*) )[ ] B. Int *q(char *)[ ] C. int (*q) (char *)[ ] D. none of the above Answer Report Discuss Option: A Explanation : Function Input : 'Pointer to a character'. For example : Pointer to a character will be represented as "char * Y" which will signify (Y is a pointer to character) Similarly in this case, a general argument notation would be "char *" Function Output : 'Pointer to an array of integers'. For example : Pointer to an array of integers will be represented as "int(*Z)[10]" which will signify (Z is a pointer to an array of integers) Similarly in this case, a general argument notation would be "int(*)[]" Function Name : 'q'. Now, in this case when we combine the input, output and function name, the function representation will becomes  int (*q (char*) )[ ] This will hence signify that the function takes an input as pointer to a character and returns pointer to an integer array. Click on Discuss to view users comments. deepa said: (11:39pm on Monday 2nd September 2013) i think answer is b can u explain me how... Write your comments here:
23:

Let x be an array. Which of the following operations are illegal?

 A. ++x B. x * 2 C. x++ D. All of these Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
24:

If func is a function needing three arguments a1, a2,  a3 then func can be invoked by

 A. func(a1, a2, a3) ; B. (*func)(a1, a2, a3); C. *func(a1, a2, a3); D. both (a) & (b) Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
25:

The declaration
int (*p) [5];
means

 A. p is a one dimensional array of size 5, of pointers to integers B. p is a pointer to a 5 element integer array C. the same as int *p[5]; D. none of the above Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:

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