PCEP Practice Question: Data Types, Variables, Basic I/O and Operators
Evaluate the expression: not (True or False) and (False or True). What is the result?
⚠ Common exam trap
The trap here is that candidates often forget the precedence of `not` over `and` and `or`, or misapply short-circuit evaluation, leading them to incorrectly compute the result as `True`.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
False
The expression is evaluated step by step: first, `True or False` evaluates to `True`; then `False or True` evaluates to `True`; the `not` operator negates the first `True` to `False`; finally, `False and True` evaluates to `False`. Therefore, the correct answer is C.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
SyntaxError
Why it's wrong here
The syntax is valid.
- ✗
True
Why it's wrong here
The overall result is False.
- ✓
False
Why this is correct
Step by step: not (True) and (True) = False.
- ✗
None
Why it's wrong here
The expression returns a boolean.
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