1) What will be the output of the following code snippet? #include <stdio.h> void solve() { int x = 2; printf("%d", (x << 1) + (x >> 1)); } int main() { solve(); return 0; } Explanation: The above example uses the knowledge of bitwis...
1) What happens if the following C++ statement is compiled and executed? int *ptr = NULL; delete ptr; Explanation: The above statement is syntactically and semantically correct as C++ allows the programmer to delete a NULL pointer, therefore, the pr...
1) How to input string in C++? There are three ways to input a string, using cin, get, and getline. All three methods are mentioned in the sample program below. #include <iostream> using namespace std; int main() { char s[10]; cout << "Ente...
1) What is an abstract class in C++? An abstract class in C++ is such that cannot be used directly and is used to form a base class for others to inherit from. If you create an object for an abstract class the compiler will throw an error at you. In ...
1) How to sort vector in C++ ? #include<bits/stdc++.h> using namespace std; //custom fuction to sort increasing order bool sortInc(int a,int b) { return a<b; } //custom function to sort in decreasing bool sortDec(int a,int b) { return a>b; ...
1) What is the difference between reference and pointer? ReferencePointer Reference is used to refer to an existing variable in another name.Pointers are used to store the address of a variable. References cannot have a null value assignedThe...
