04.05 Debugging Tools And Techniques - Quiz

Check your understanding

1. What is debugging?

   • Removing comments from code
   • Optimizing code for better performance
   • Finding and fixing errors in code { data-correct }
   • Compiling code to machine language

2. Which type of bug prevents code from running at all?

   • Logic errors
   • Runtime errors
   • Syntax errors { data-correct }
   • Performance errors

3. What happens when a runtime error occurs?

   • The code won’t compile
   • The code runs but crashes during execution { data-correct }
   • The code produces incorrect results
   • The code runs slowly

4. In the factorial range(n)?debugging activity, what was wrong with

   • It included zero in the multiplication { data-correct }
   • It was too slow
   • It used too much memory
   • It caused a syntax error

5. What is the simplest debugging technique?

   • Using breakpoints
   • Adding print statements { data-correct }
   • Single line stepping
   • Using watches

6. What is a breakpoint?

   • A syntax error in code
   • A marker that pauses program execution { data-correct }
   • A type of loop
   • A function parameter

7. When debugging the factorial function, what should factorial(0) return?

   • 0
   • 1 { data-correct }
   • undefined
   • an error

8. What debugging technique lets you monitor specific variables during execution?

   • Breakpoints
   • Watches { data-correct }
   • Print statements
   • Single stepping

9. Which statement is used to check preconditions and postconditions in Python?

   • print()
   • if
   • assert { data-correct }
   • try

10. What is “single line stepping”?

    • Writing code one line at a time
    • Executing code one line at a time { data-correct }
    • Deleting code one line at a time
    • Commenting code one line at a time

11. In the buggy factorial function, why did factorial(1) return 0?

    • The function was called incorrectly
    • range(1) produces [0], so 1 × 0 = 0 { data-correct }
    • There was a division by zero
    • The variable wasn’t initialized

12. What should you do FIRST when debugging?

    • Fix the code immediately
    • Ask someone else for help
    • Reproduce the bug consistently { data-correct }
    • Rewrite the entire function