Cpp Questions

What is the correct way to declare a constant variable named 'PI' with the value 3.14159?

If 'ptr' is a pointer to an integer variable 'num', how would you access the value stored in 'num' using 'ptr'?

In C++, a character array can be used to store a string. What is the special character that signifies the end of a string in a character array?

Which principle of OOP emphasizes hiding internal details and exposing only essential information?

What does the 'protected' access specifier in C++ control?

What is the output of the following code snippet: cout << (5 > 3 && 10 < 20);?

What will the following C++ code snippet print?

#include <iostream>

void changeValue(int x) {
  x = 100;
}

int main() {
    int num = 50;
    changeValue(num);
    std::cout << num;  
    return 0;
}

How do you declare a multi-dimensional array (specifically, a 2D array) in C++?

What is the output of the following code snippet?

int i = 10;
do
{
  cout << i << " ";
  i--;
} while (i > 10);

In a switch-case statement, what happens if no case matches the switch expression and there is no 'default' case?