Error Handling Quiz Online Practice Test

1. What will be the output of the following C code if no errors occur with the stream fp?
#include <stdio.h>
int main() {
FILE *fp;
fp = fopen("newfile", "w");
printf("%d\n", ferror(fp));
return 0;
}

2. In the context of the main function, what does the statement return expr; equate to?

3. What will the following C program output when executed?
#include <stdio.h>
int main() {
FILE *fp;
char c;
fp = fopen("newfile1.txt", "r");
while (!feof(fp)) {
c = getc(fp);
putc(c, stdout);
}
return 0;
}

4. What will the following C program produce as output upon execution?
#include <stdio.h>
int main() {
FILE *fp = stdout;
stderr = fp;
fprintf(stderr, "%s", "hello"); return 0;
}

5. What will the output be from the following C program when executed?
#include <stdio.h>
int main() {
char buf[12];
stderr = stdin;
fscanf(stderr, "%s", buf);
printf("%s\n", buf);
return 0;
}

6. Stderr is analogous to which of the following?

7. What is the outcome of executing the following C statement?
fprintf(stderr, "error: could not open file\n");

8. Which function allows safe termination of the main function from an external function?

9. Which of the following actions results in an error?

10. What does the C function int ferror(FILE *fp) do?

11. What is stderr similar to?

12. What will be the output of the following C statement?
fprintf(stderr, "error: could not open file");

13. Which of the following functions can be used to terminate the main() function from another function safely?

14. Which of the following situations results in an error?

15. What does the C function int ferror(FILE *fp) do?