Question at position 15 If the missing lines are correctly filled in, the program should define 2 functions, named enter_level and finish_level. enter_level should display the user’s score when starting the level. finish_level should display the user’s score when finishing the level. Then, it should display how much score they gained from finishing the level. Level 3 started: Score at 100.Level 3 finished: Score at 400.You gained 300 points! [table]
1 def # ( code WILL go here ) :2 print(f'Level {level} started: Score at {start}.')3 4 def # ( code WILL go here ) :5 difference = end - start6 print(f'Level {level} finished: Score at {end}.')7 print(f'You gained {difference} points!')8 9 def main():10 level_number = 311 start_score = 10012 enter_level(level_number, start_score)13 14 # Time passes as player plays level...15 end_score = 40016 finish_level(level_number, start_score, end_score)17 18 main()
[/table] Which of the following options is the correct missing code? 1 def enter_level(level: int, start: int, end: int):... 4 def finish_level(level: int, start: int):1 def enter_level(level: int, start: int, end: int):...4 def finish_level(level: int, start: int, end: int):1 def enter_level(level: int, start: int):...4 def finish_level(level: int, end: int, start: int):1 def enter_level(level: int, start: int):...4 def finish_level(level: int, start: int, end: int):Clear my selection

Question

Question at position 15 If the missing lines are correctly filled in, the program should define 2 functions, named enter_level and finish_level. enter_level should display the user’s score when starting the level. finish_level should display the user’s score when finishing the level. Then, it should display how much score they gained from finishing the level. Level 3 started: Score at 100.Level 3 finished: Score at 400.You gained 300 points! [table]
1  def # ( code WILL go here ) :2 print(f'Level {level} started: Score at {start}.')3 4  def # ( code WILL go here ) :5 difference = end - start6 print(f'Level {level} finished: Score at {end}.')7 print(f'You gained {difference} points!')8 9  def main():10 level_number = 311 start_score = 10012 enter_level(level_number, start_score)13 14 # Time passes as player plays level...15 end_score = 40016 finish_level(level_number, start_score, end_score)17 18 main()
[/table] Which of the following options is the correct missing code? 1  def enter_level(level: int, start: int, end: int):... 4  def finish_level(level: int, start: int):1 def enter_level(level: int, start: int, end: int):...4 def finish_level(level: int, start: int, end: int):1 def enter_level(level: int, start: int):...4 def finish_level(level: int, end: int, start: int):1 def enter_level(level: int, start: int):...4 def finish_level(level: int, start: int, end: int):Clear my selection

BlackTom AI · Accepted Answer

Function calls determine required parameter lists: enter_level is invoked with two arguments (level_number, start_score) and finish_level is invoked with three (level_number, start_score, end_score), so the definitions must match those calls.

1) Relevant knowledge points and concepts
- In Python, a function must accept the same number of positional arguments as are passed when it is called.
- Parameter order matters for positional arguments.
- The code uses variables level, start and end inside the function bodies: enter_level prints level and start; finish_level computes difference = end - start and prints level, end, and difference.

2) Step-by-step reasoning
- Look at main(): line 11 sets level_number = 3 and start_score = 100.
- Line 12 calls enter_level(level_number, start_score) — two positional arguments. Therefore enter_level must be defined with two parameters, commonly (level, start).
- Later, line 15 sets end_score = 400 and line 16 calls finish_level(level_number, start_score, end_score) — three positional arguments. Therefore finish_level must be defined with three parameters, commonly (level, start, end).
- The function bodies reference these exact names: enter_level prints f'Level {level} started: Score at {start}.' and finish_level computes difference = end - start then prints f'Level {level} finished: Score at {end}.' and f'You gained {difference} points!'.

3) Calculations (intermediate steps)
- Given start = 100 and end = 400:
  difference = end - start
  difference = 400 - 100
  difference = 300
- That matches the expected output "You gained 300 points!"

4) Why the correct answer is correct
- The correct signatures are def enter_level(level: int, start: int): and def finish_level(level: int, start: int, end: int): because they match the number, order, and names used by the calls and the function bodies.

5) Why the other options are incorrect
- Option with enter_level(level, start, end) fails because enter_level is called with only two arguments (would raise a missing-argument error).
- Option with both functions taking three arguments is wrong for the same reason for enter_level.
- Option that defines finish_level(level, end, start) swaps parameter order: the positional call finish_level(level, start, end) would assign start to end and end to start, making difference = start - end (100 - 400 = -300), producing an incorrect negative result.

6) Conclusion
The correct choice is: def enter_level(level: int, start: int): ... and def finish_level(level: int, start: int, end: int): — this matches the provided answer.

类似问题

Select all correct definitions of functions making sure to adhere to best practices.

You own a bond that pays $64 in interest annually. The face value is $1,000 and the current market price is $1,021.61. The bond matures in 11 years. What is the yield to maturity?

Which of the following statements is CORRECT?

It will cost $9,600 to acquire an ice cream cart that is expected to produce cash inflows of $3,600 a year for three years. After the three years, the cart is expected to be worthless. What is the payback period?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单