The OrderedDict class from Python’s collections module remembers the insertion order of keys. This quiz helps you test your understanding of its behavior, methods, and differences from regular dictionaries.
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What is the main feature of an OrderedDict compared to a regular dict in Python 3.5?
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Question 3 of 15
3. Question
What will be the output of:
from collections import OrderedDict d = OrderedDict() d[‘a’] = 1 d[‘b’] = 2 print(d)
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Question 4 of 15
4. Question
How do you move an existing key to the end?
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Question 5 of 15
5. Question
Which of the following is TRUE about `OrderedDict` in Python 3.7+?
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Question 6 of 15
6. Question
What happens if you update the value of a key in `OrderedDict`?
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Question 7 of 15
7. Question
What does this do?
d.move_to_end(‘x’, last=False)
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Question 8 of 15
8. Question
Which method deletes the last inserted item from an `OrderedDict`?
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Question 9 of 15
9. Question
What is the result of `popitem(last=False)`?
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Question 10 of 15
10. Question
Can `OrderedDict` have duplicate keys?
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Question 11 of 15
11. Question
Which function returns all keys in insertion order?
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Question 12 of 15
12. Question
What type of data structure is `OrderedDict` internally?
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Question 13 of 15
13. Question
Is `OrderedDict` a subclass of dict?
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Question 14 of 15
14. Question
What is the output?
from collections import OrderedDict od = OrderedDict([(‘x’,1), (‘y’,2)]) od[‘x’] = 10 print(list(od.items()))
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Question 15 of 15
15. Question
Which scenario still needs `OrderedDict` even in Python 3.8+?
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Summary
The `OrderedDict` in Python preserves insertion order and provides extra control with methods like `move_to_end()` and `popitem(last=False)`. While Python 3.7+ dicts retain order by default, `OrderedDict` remains valuable for specific use cases, such as order-sensitive logic or backward compatibility.
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