C programming Questions

C programming For Recent college graduates and professionals for job interview.: ------------- some small C programs are given asked to tell the function/errors etc. one of the question(last in the paper) is an invalid statement. finish of all these very fast and think about those others. they are simple only.

1.

int a=2,b=3,c=4;
printf("a=%d,b=%d
",a,b,c);

2.for(i=1;i<10;++i,printf("%d",i));+- ANS:compiling error.

3.whole logic is given in func s but they are working properly. the main logic is :

char *string;

string=malloc(5*sizeof(char));
strcpy(string,"hello");
printf("%s",string); /* func to print */

ANS: hello and some extra characters until uccerence of \0 .

4. in a system integer takes 3bytes and char takes 1byte ....... struct smthing{

int a;
char b[4];
};