Question
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Answer (Detailed Solution Below)
Option 2 : [1, 2, 3, 4] / [1, 2, 3, 4]
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Detailed Solution
सही उत्तर [1, 2, 3, 4] / [1, 2, 3, 4] है।
Key Points
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prepsnap.in • Part -AQuestion:
What is the output of the following Python code? `x = [1, 2, 3]` / `y = x` / `y += [4]` / `print(x)` / निम्नलिखित Python कोड का आउटपुट क्या होगा? `x = [1, 2, 3]` / `y = x` / `y += [4]` / `print(x)`
1.
[1, 2, 3] / [1, 2, 3]
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[1, 2, 3, 4] / [1, 2, 3, 4]
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[4, 1, 2, 3] / [4, 1, 2, 3]
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Error — cannot modify through alias / त्रुटि — alias से संशोधन नहीं हो सकता
Correct Answer: [1, 2, 3, 4] / [1, 2, 3, 4]
`y = x` makes both names refer to the same list object, and `+=` on a list mutates it in place, so `x` also shows `[1, 2, 3, 4]`. The trap is assuming `y += [4]` rebinds `y` to a new list. / `y = x` से दोनों नाम एक ही list ऑब्जेक्ट को संदर्भित करते हैं, और list पर `+=` उसे in-place बदलता है, अतः `x` भी `[1, 2, 3, 4]` दिखाता है। जाल यह मानना है कि `y += [4]` से `y` नई list से bind हो जाता है।
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