Python Coding Challange - Question with Answer (01130825)

 

Let’s break it down step-by-step:

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Code:

a = [1, 2] * 2
a[1] = 5
print(a)

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Step 1 – [1, 2] * 2
The * 2 duplicates the list:

[1, 2, 1, 2]

So initially:

a = [1, 2, 1, 2]

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Step 2 – a[1] = 5
Index 1 refers to the second element in the list.
Original list:

[1, 2, 1, 2]
    ↑

We replace the 2 with 5:

[1, 5, 1, 2]

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Step 3 – print(a)
Output will be:

[1, 5, 1, 2]

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✅ Final Answer: [1, 5, 1, 2]

💡 Key concept: Multiplying a list repeats its elements in sequence, and assignment updates just that one index.

400 Days Python Coding Challenges with Explanation