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Which of the follwoing function(s) of Array classes are similar to [] operator?

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Which of the follwoing function(s) of Array classes are similar to [] operator?

(a) at()

(b) get()

(c) both at() and get()

(d) front()

I had been asked this question in exam.

I'd like to ask this question from seq_con Array Class topic in division Class Hierarchies, Library & Containers of C++

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The correct choice is (c) both at() and get()

Explanation: Both at() and get() function are used to access the elements stored at i’th position of the array.

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