Computer Science
Assertion (A): ('x' and 'y' or not 7) is a valid expression in Python.
Reason (R): In Python, strings and numbers can be treated as Boolean values.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Python Data Handling
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation
In the expression ('x' and 'y' or not 7), both 'x' and 'y' are non-empty string literals, hence they are evaluated as True, and 7 is a non-zero number, also evaluated as True. Therefore, this expression results in 'y'. In Python, when evaluating expressions in a Boolean context, such as conditions in if statements, non-empty strings, non-zero numbers, and non-None values are considered True, while empty strings, numeric zero (0), and None are considered False.
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Related Questions
Expand the following:
(a) LIFO
(b) FIFO
Assertion (A): Program should check for Overflow condition before executing Push operation on stack and similarly check for Underflow condition before executing Pop operation.
Reasoning (R): In stack, Underflow condition signifies that there is no element available in the stack while Overflow condition means no further element can be pushed in the stack.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
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