Embercode: AI-powered software engineer course

1. What does this program print? ``

cpp
#include <iostream>

int main() {
    int last = -1;
    int i = 0;
    for (i = 5; i >= 1; i -= 2) {
        last = i;
    }
    std::cout << last << ' ' << i << '\n';
}

``

5 51 -11 13 -1

2. What does this program print? ``

cpp
#include <cstddef>
#include <iostream>
#include <vector>

int main() {
    std::vector<int> v = {10, 20, 30, 40, 50, 60};
    int sum = 0;
    for (std::size_t i = 1; i < 4; ++i) {
        sum += v[i];
    }
    std::cout << sum << '\n';
}

``

6010090120

3. What does this program print? ``

cpp
#include <cstddef>
#include <iostream>
#include <vector>

int main() {
    std::vector<int> v = {10, 20, 30};
    for (std::size_t i = v.size(); i-- > 0;) {
        std::cout << v[i] << ' ';
    }
    std::cout << '\n';
}

``

10 20 3030 20 10 0Undefined: the loop never ends30 20 10

4. Fill in the blank: a half-open range [start, end) has end minus ___ positions.

Type your answer.

5. Fill in the blank: the standard function that finds the first position whose value is at least a target in a sorted range is std::___.

Type your answer.

Steps and half-open ranges