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What kind of pattern is iterator pattern?

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What kind of pattern is iterator pattern?

(a) Design pattern

(b) Sequence pattern

(c) Adapter pattern

(d) Star pattern

This question was addressed to me during an online interview.

I would like to ask this question from Iterators and Sequences in division Algorithms, Objects & Iterators in C++ of C++

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Right choice is (a) Design pattern

Explanation: Iterator pattern is a design pattern in which an iterator is used to traverse a container and access the container’s elements.

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