Welcome to your C++ Level 2
1.
What is the expected output of the following C++ code?
#include
int main() {
int x = 5;
int y = x++;
std::cout << x << " " << y;
return 0;
}
2.
What is the expected output of the following C++ code?
#include
int main() {
int x = 10;
int y = ++x;
std::cout << x << " " << y;
return 0;
}
3.
What is the expected output of the following C++ code?
#include
int main() {
int x = 3;
std::cout << (x << 2);
return 0;
}
4.
What is the expected output of the following C++ code?
#include
int main() {
int x = 10;
int y = 5;
std::cout << (x % y);
return 0;
}
5.
What is the expected output of the following C++ code?
#include
int main() {
int x = 5;
int y = 2;
std::cout << (x / y);
return 0;
}
6.
What is the expected output of the following C++ code?
#include
int main() {
char str[] = "Hello, World!";
std::cout << str[7];
return 0;
}
7.
What is the expected output of the following C++ code?
#include
int main() {
int arr[] = {1, 2, 3, 4, 5};
std::cout << arr[3];
return 0;
}
8.
What is the expected output of the following C++ code?
#include
int main() {
int arr[] = {1, 2, 3, 4, 5};
std::cout << arr[7];
return 0;
}
9.
What is the expected output of the following C++ code?
#include
int main() {
int arr[5] = {0};
std::cout << arr[2];
return 0;
}
10.
What is the expected output of the following C++ code?
#include
int main() {
int arr[5];
std::cout << arr[2];
return 0;
}
11.
What is the expected output of the following C++ code?
#include
int main() {
int i = 0;
while (i < 5) {
std::cout << i << " ";
i++;
}
return 0;
}
12.
What is the expected output of the following C++ code?
#include
int main() {
int i = 5;
do {
std::cout << i << " ";
i--;
} while (i > 0);
return 0;
}
13.
What is the expected output of the following C++ code?
#include
int main() {
int i;
for (i = 0; i < 3; i++) {
std::cout << i << " ";
}
return 0;
}
14.
What is the expected output of the following C++ code?
#include
int main() {
int i;
for (i = 0; i < 3; ++i) {
std::cout << i << " ";
}
return 0;
}
15.
What is the expected output of the following C++ code?
#include
int main() {
int i;
for (i = 1; i <= 5; i += 2) {
std::cout << i << " ";
}
return 0;
}
16.
What is the expected output of the following C++ code?
#include
int main() {
int i;
for (i = 5; i >= 0; i--) {
std::cout << i << " ";
}
return 0;
}
17.
What is the expected output of the following C++ code?
#include
int main() {
int i;
for (i = 0; i < 5; i++) {
if (i == 3)
continue;
std::cout << i << " ";
}
return 0;
}
18.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::vector vec = {1, 2, 3, 4, 5};
for (int i : vec) {
std::cout << i << " ";
}
return 0;
}
19.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::vector vec = {1, 2, 3, 4, 5};
vec.pop_back();
for (int i : vec) {
std::cout << i << " ";
}
return 0;
}
20.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::vector vec = {1, 2, 3, 4, 5};
vec.push_back(6);
for (int i : vec) {
std::cout << i << " ";
}
return 0;
}
21.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::vector vec = {1, 2, 3, 4, 5};
vec.insert(vec.begin() + 2, 6);
for (int i : vec) {
std::cout << i << " ";
}
return 0;
}
22.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::string str1 = "Hello";
std::string str2 = "World";
std::string result = str1 + ", " + str2;
std::cout << result;
return 0;
}
23.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::string str = "Hello, World!";
std::cout << str.length();
return 0;
}
24.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::string str = "Hello, World!";
std::cout << str[7];
return 0;
}
25.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::string str = "Hello, World!";
std::cout << str.find("World");
return 0;
}
26.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::string str = "Hello, World!";
str.replace(7, 5, "Universe");
std::cout << str;
return 0;
}
27.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::vector vec = {1, 2, 3, 4, 5};
std::cout << vec.at(2);
return 0;
}
28.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::vector vec = {1, 2, 3, 4, 5};
vec.erase(vec.begin() + 2);
for (int i : vec) {
std::cout << i << " ";
}
return 0;
}
29.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::vector vec = {1, 2, 3, 4, 5};
vec.push_back(6);
for (int i : vec) {
std::cout << i << " ";
}
return 0;
}
30.
What is the expected output of the following C++ code?
#include
#include
int main() {
std::vector vec = {1, 2, 3, 4, 5};
vec.insert(vec.begin() + 2, 6);
for (int i : vec) {
std::cout << i << " ";
}
return 0;
}
