LLD - Behavioral Design Patterns — Part 1
Which of the following is the correct method signature for the next() method in an iterator interface?
Which of the following is the correct method signature for the next() method in an iterator interface?
easy🧠 Conceptual Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall the standard iterator method signature
Thenext()method typically takes no parameters except the implicit self and returns the next element in the collection.Step 2: Analyze each option
def next(self) -> Element matches the standard signature: it takes self and returns an element. Options B and D incorrectly add parameters, and C returns void which is incorrect.Final Answer:
def next(self) -> Element -> Option CQuick Check:
next() takes no args, returns element [OK]
Quick Trick: next() returns next element, no extra parameters [OK]
Common Mistakes:
MISTAKES- Adding parameters to next() method
- Returning void instead of element
- Confusing next() with hasNext() method
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