String Data Structure Quiz for Beginners

string a = "10";
string b = "20";
string c = a + b;

Guess the output:

What the below program will  Print?

#// C program to find the length of string
#include <bits/stdc++.h>
using namespace std;
int main()
{

    string str = "Hello Geeks";
    int i;
    for (i = 0; str[i] != '\0'; ++i)
        ;
    cout << i;

    return 0;
}

Which of these methods of class String is used to obtain the length of the String object?

What is the output of the below code?

#include <iostream>
using namespace std;

int main()
{

    string str = "GeeksForGeeks";
    cout << str.substr(2).substr(4);
    return 0;
}

Which of the following is a palindromic string?

What is the time complexity to reverse a string?

Which of these methods from the String class is used to extract a single character from an object of String?

How does strcmp() function work to compare two strings?

Which of the following statement is a binary string?

What is the output of the following code?

#include <iostream>
using namespace std;

int main() {

    cout << "GFG!"[0] <<" "<<"GFG!"[3] ;
    return 0;
}