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Which function is used to optimize the space in vector?

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Which function is used to optimize the space in vector?

(a) at

(b) bool

(c) operator

(d) operand

I had been asked this question by my school principal while I was bunking the class.

This question is from Vector Arithmetic in section Strings, Streams & Numerics in C++ of C++

1 Answer

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Best answer
The correct answer is (b) bool

Easy explanation - This is a specialized version of vector, which is used for elements of type bool and optimizes for space.

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