Question at position 3 What will the following code output? a = (True and (not False or (True and False))) b = not (False and (not True or (True and False))) c = True and (not (True and (False or True))) print(a, b, c)True True FalseFalse True FalseTrue False FalseFalse True TrueClear my selection单项选择题
A
True True False
B
False True False
C
True False False
D
False True True

Question

Question at position 3 What will the following code output? a = (True and (not False or (True and False))) b = not (False and (not True or (True and False))) c = True and (not (True and (False or True))) print(a, b, c)True True FalseFalse True FalseTrue False FalseFalse True TrueClear my selection单项选择题

A

True True False

B

False True False

C

True False False

D

False True True

BlackTom AI · Accepted Answer

1. Relevant knowledge points and concepts
- Boolean operators in Python: not, and, or. Operator precedence: not is evaluated before and, and is evaluated before or. Parentheses force the order of evaluation. Boolean values: True and False. The print(a, b, c) call prints the three values separated by spaces.

2. Step-by-step evaluation for each variable (showing all intermediate steps)

a = (True and (not False or (True and False)))
- Evaluate inner parentheses:
  - not False → True
  - True and False → False
- Now the inner expression becomes: (True or False) → True
- So a = True and True → True

b = not (False and (not True or (True and False)))
- Evaluate inner parentheses:
  - not True → False
  - True and False → False
- Now inner: (False or False) → False
- So inside the outer parentheses: False and False → False
- Apply not: not False → True
- So b = True

c = True and (not (True and (False or True)))
- Evaluate inner parentheses:
  - False or True → True
  - True and True → True
- Now we have not True → False
- So c = True and False → False

3. All intermediate arithmetic/logic steps were shown above for each subexpression.

4. Why the correct answer is correct
Each Boolean subexpression evaluates as shown: a → True, b → True, c → False. Therefore print(a, b, c) outputs the three values in order, separated by spaces: "True True False".

5. Why the other multiple-choice options are incorrect
- "False True False": Incorrect because a evaluates to True, not False.
- "True False False": Incorrect because b evaluates to True, not False.
- "False True True": Incorrect because a is not False and c is not True (c is False).

6. Conclusion
The evaluated output is "True True False", which matches the provided correct answer.

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The content of A1 is hidden from you. But, you know that a logical value was entered in that cell. When you execute the following formula in A3, what would be the outcome returned in A3? =OR(A1=TRUE,A1=FALSE)

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