Python Coding Challenge - Question with Answer (ID -050726)

 

Explanation:

🔹 Line 1: Create the First Set

{1, 2, 3}

Python creates a set containing:

1

2

3

Memory:

Set A

{1, 2, 3}

🔹 Line 2: Create the Second Set

{2, 3, 4}

Python creates another set containing:

2

3

4

Memory:

Set B

{2, 3, 4}

🔹 Line 3: Apply the & Operator

{1, 2, 3} & {2, 3, 4}

The & operator means:

Find the intersection of both sets.

Intersection means:

Return only the elements that are present in both sets.

🔹 Step 1: Compare Element 1

Python checks:

Is 1 present in Set B?

Set B:

{2, 3, 4}

Answer:

No

So 1 is not included.

🔹 Step 2: Compare Element 2

Python checks:

Is 2 present in Set B?

Answer:

Yes

So Python keeps:

2

🔹 Step 3: Compare Element 3

Python checks:

Is 3 present in Set B?

Answer:

Yes

So Python keeps:

3

🔹 Step 4: Ignore Element 4

4 exists only in the second set.

Since intersection keeps common elements only, 4 is not included.

🔹 Result After Intersection

Common elements are:

{2, 3}

Python creates a new set containing these elements.

🔹 Line 4: Print the Result

print({2, 3})

Output:

{2, 3}

⚡ Visual Representation

Set A

{1, 2, 3}

Set B

{2, 3, 4}

Common elements:

        Set A             Set B

      {1  2  3}       {2  3  4}

          ▲                  ▲

          │                     

      Common Elements

Result:

{2, 3}

🔥 Understanding Set Operators

Intersection (&)

{1,2,3} & {2,3,4}

Output:

{2,3}

(Common elements)

Union (|)

{1,2,3} | {2,3,4}

Output:

{1,2,3,4}

(All unique elements)

Difference (-)

{1,2,3} - {2,3,4}

Output:

{1}

(Elements only in the first set)

Symmetric Difference (^)

{1,2,3} ^ {2,3,4}

Output:

{1,4}

(Elements present in exactly one of the sets)

❌ Common Mistake

Many developers think:

&

means AND like in Boolean logic.

For sets, it has a different meaning.

It means:

Intersection

That is:

Keep only the elements that appear in both sets.

🎯 Final Result

{2, 3}

✅ Correct Output

{2, 3}