C Quiz

Pass with 7 / 10 to unlock your certificate.

1. 1. What does sizeof('A') return in C?

   1248

2. 2. Which header declares malloc?

   <stdio.h><stdlib.h><string.h><memory.h>

3. 3. What does a NULL pointer dereference cause?

   Compile errorUndefined behaviorAlways crashesReturns 0

4. 4. Which storage class makes a variable persist between function calls?

   autostaticregisterextern

5. 5. What is the result of 5 / 2 in C?

   2.5232.0

6. 6. How do you correctly free dynamically allocated memory?

   delete p;free(p);dealloc(p);p = NULL;

7. 7. Which operator gives the address of a variable?

   *&->@

8. 8. What does `const int *p` mean?

   p is constantvalue at p is constantBoth are constantNeither

9. 9. Which function reads a line safely (no buffer overflow)?

   getsfgetsscanfread_line

10. 10. What is the format specifier for an unsigned long?

    %d%u%lu%ld