Question:
Consider the following Python code snippet.
\[
A = \{\text{"this"}, \text{"that"}\}, \quad B = \{\text{"that"}, \text{"other"}\}, \quad C = \{\text{"other"}, \text{"this"}\}
\]
\[
\text{while "other" in C:}
\]
\[
\quad \text{if "this" in A:}
\]
\[
\quad \quad A, B, C = A - B, B - C, C - A
\]
\[
\quad \text{if "that" in B:}
\]
\[
\quad \quad A, B, C = C | A, A | B, B | C
\]
When the above program is executed, at the end, which of the following sets contains "this"?
Consider the following Python code snippet.
\[
A = \{\text{"this"}, \text{"that"}\}, \quad B = \{\text{"that"}, \text{"other"}\}, \quad C = \{\text{"other"}, \text{"this"}\}
\]
\[
\text{while "other" in C:}
\]
\[
\quad \text{if "this" in A:}
\]
\[
\quad \quad A, B, C = A - B, B - C, C - A
\]
\[
\quad \text{if "that" in B:}
\]
\[
\quad \quad A, B, C = C | A, A | B, B | C
\]
When the above program is executed, at the end, which of the following sets contains "this"?
Show Hint
In Python, set operations such as union (\(|\)) and difference (\(-\)) can modify sets in place. The "in" operator checks whether an element exists in a set, and set operations like union and difference are commonly used for solving problems involving sets.
Updated On: Feb 3, 2026
- Only A
- Only B
- Only C
- A, C
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
The initial sets are \( A = \{ \text{"this"}, \text{"that"} \} \), \( B = \{ \text{"that"}, \text{"other"} \} \), and \( C = \{ \text{"other"}, \text{"this"} \} \). After executing the program and performing the set operations within the while loop, the sets are updated as follows:
\( A = \{ \text{"other"}, \text{"this"} \} \)
\( B = \{ \text{"that"}, \text{"other"}, \text{"this"} \} \)
\( C = \{ \text{"that"}, \text{"other"}, \text{"this"} \} \)
Thus, "this" is found in set \( B \) at the end of the program execution.
The correct answer is Option (B).
\( A = \{ \text{"other"}, \text{"this"} \} \)
\( B = \{ \text{"that"}, \text{"other"}, \text{"this"} \} \)
\( C = \{ \text{"that"}, \text{"other"}, \text{"this"} \} \)
Thus, "this" is found in set \( B \) at the end of the program execution.
The correct answer is Option (B).
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