Arrays and Strings in C++ MCQs with Answers 2027

Q41

Open question

How do you access the element at the second row and third column of a two-dimensional array named 'matrix' in C++?

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Q42

Open question

Which of the following is true regarding the declaration of a string in C++ using the char array?

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Q43

Open question

Which is an instantiation of the basic_string class template?

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Q44

Open question

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
int main ()
{
    string str="Steve Jobs founded the apple";
    string str2 = str.substr (6, 4);
    unsigned pos = str.find("the");
    string str3 = str.substr (pos);
    cout << str2 << ' ' << str3 << '\n';
    return 0;
}

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Q45

Open question

What will be the output of the following C++ code?

#include <stdio.h>
#include<iostream>
using namespace std;
int main()
{
    int a = 5, b = 10, c = 15;
    int arr[3] = {&a, &b, &c};
    cout << *arr[*arr[1] - 8];
    return 0;
}

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Q46

Open question

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
int main ()
{
    string str ("Steve jobs");
    cout << str.length();
    return 0;
}

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Q47

Open question

What will happen if a string is empty?

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Q48

Open question

How many parameters can a resize method take?

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Q49

Open question

What will be the output of the following C++ code?

#include <stdio.h>
#include <iostream>
using namespace std;
int main()
{
    int array[] = {10, 20, 30};
    cout << -2[array];
    return 0;
}

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Q50

Open question

What is the difference between unsigned int length() and unsigned int size()?

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Q51

Open question

How does the strings are stored in the memory?

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Q52

Open question

What will be the output of the following C++ code?

#include <stdio.h>
#include<iostream>
using namespace std;
int array1[] = {1200, 200, 2300, 1230, 1543};
int array2[] = {12, 14, 16, 18, 20};
int temp, result = 0;
int main()
{
    for (temp = 0; temp < 5; temp++) 
    {
        result += array1[temp];
    }
    for (temp = 0; temp < 4; temp++)
    {
        result += array2[temp];
    }
    cout << result;
    return 0;
}

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Q53

Open question

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
int main ()
{
    string str ("Steve jobs");
    cout << str.capacity() << "\n";
    return 0;
}

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Q54

Open question

How many maximum number of parameters does a string constructor can take?

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Q55

Open question

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
int main ()
{
    string str;
    string str2="Steve jobs";
    string str3="He founded apple";
    str.append(str2);
    str.append(str3, 6, 3);
    str.append(str3.begin() + 6, str3.end());
    str.append(5,0x2e);
    cout << str << '\n';
    return 0;
}

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Q56

Open question

Which of the following accesses the seventh element stored in array?

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Q57

Open question

What is the correct definition of an array?

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Q58

Open question

Which of the following gives the memory address of the first element in array?