Question

What is the use of count() function in bitset?

(a) To count the number of 0’s

(b) To count the number of 1’s

(c) To count the number of total bits in a bitset

(d) To count the number of low bits

This question was posed to me in an online interview.

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

Answer 1

Right choice is (b) To count the number of 1’s

Easiest explanation - <bitset> header provides the count() function to count the number of 1’s or high bits in the bitset variable.