INTERVIEW QUESTIONS COMPUTER HARDWARE EMBEDDED SYSTEMS DETAILS

Question: malloc(sizeof(0)) will return — valid pointer

Answer: sizeof(0) returns the size of integer whose value is 0. Hence malloc
would allocate sizeof(int) bytes and return a valid pointer.

Submitted by Kokila21 ([email protected])

sizeof(0) returns the size of integer whose value is 0. Hence malloc
would allocate sizeof(int) bytes and return a valid pointer.

Submitted by Kokila21 ([email protected]) Source: CoolInterview.com

It is equivalent to free() and it returns valid pointer. Source: CoolInterview.com

malloc() Function always returns
Void *(void pointer),we've to explicitly Typecast ..... Source: CoolInterview.com

And here is an example:
int *p;
p = (int*)malloc(sizeof(0));
if ( p == NULL )
printf("Invalid Pointer");
else
printf("Valid Pointer"); Source: CoolInterview.com

umesh, i think it is partially correct.

malloc always returns (void *).

thats y, when u want to dynamically allocate memory in heap,

int *p = (int *)malloc(sizeof(int) *10);
Here TYPECAST "int *" is must.
So answer is malloc always return "void *". Source: CoolInterview.com

int *p = (int *)malloc(sizeof(int) *10);

here inside malloc sizeof means reserve 4 bytes of memory for each data as it is of int type and *10 means resserve 10 such locations...
also p here is the pointer to the starting address of the 40 byte of space that been reserved in the Heap memory. Source: CoolInterview.com

int *p = (int *)malloc(sizeof(int) *10);

here sizeof(int) captures 4 bytes of int data types and *10 means 10 such memory blocks in all 40 bytes to be allocated in the memory whose starting address is to be given to p.
Source: CoolInterview.com

int *p = (int *)malloc(sizeof(int) *10);

here sizeof(int) captures 4 bytes of int data types and *10 means 10 such memory blocks in all 40 bytes to be allocated in the memory whose starting address is to be given to p.
Source: CoolInterview.com

If you have the better answer, then send it to us. We will display your answer after the approval.

Rules to Post Answers in CoolInterview.com:-

• There should not be any Spelling Mistakes.
• There should not be any Gramatical Errors.
• Answers must not contain any bad words.
• Answers should not be the repeat of same answer, already approved.
• Answer should be complete in itself.

Name :*
Email Id :*
Answer :*
Verification Code	Not readable? Load New Code
Enter the above shown code: *
	Inform me about updated answers to this question