C++ miscellaneous MCQ question and answer with solution | C++ Programimg MCQs

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92.
What is Pseudo-random number engines?

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93.
What will be the output of the following C++ code?
#include <iostream>
#include <set>
using namespace std;
int main ()
{
    multiset<int> mymultiset;
    for (int i = 0; i < 5; i++) mymultiset.insert(i);
    multiset<int> :: key_compare mycomp = mymultiset.key_comp();
    int highest = *mymultiset.rbegin();
    multiset<int> :: iterator it = mymultiset.begin();
    do 
    {
        cout << ' ' << *it;
    } while (mycomp(*it++, highest));
    return 0;
}

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94.
What type can be used to replace templates from this function?
template<class T, class U>
T func(T a, T b, U c)
{
	if(c == '+' || c){
		return a+b;
	}
	else if(c == '-' || !c){
		return a-b;
	}
}

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95.
What is the importance of mutable keyword?

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96.
What will be the output of the following C++ code?
#include <iostream>
#include<string.h>
using namespace std;
int main()
{
    try
    {
        char *p;
        strcpy(p, "How r u");
    }
    catch(const exception& er)
    {
    }
}

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97.
What will be the output of the following C++ code?
#include <iostream>   
#include <algorithm>  
using namespace std;
int main () 
{
    cout << "max(1, 2) == " << max(1, 2) << '\n';
    cout << "max('a', 'z') == " << max('a', 'z') << '\n';
    return 0;
}

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99.
What will be the output of the following C++ code?
#include <iostream>
#include <vector>
#include <iterator>
#include <stddef.h>
using namespace std;
template<class myType>
class SimpleContainer
{
    public:
    SimpleContainer(size_t xDim, size_t yDim, myType const& defaultValue)
    : objectData(xDim * yDim, defaultValue)
    , xSize(xDim)
    , ySize(yDim)
    {
    }
    myType& operator()(size_t x, size_t y)
    {
        return objectData[y * xSize + x];
    }
    myType const& operator()(size_t x, size_t y) const 
    {
        return objectData[y * xSize + x];
    }
    int getSize()
    {
        return objectData.size();
    }
    void inputEntireVector(vector<myType> inputVector)
    {
        objectData.swap(inputVector);
    }
    void printContainer(ostream& stream)
    {
        copy(objectData.begin(), objectData.end(),
        ostream_iterator<myType>(stream, ""/*No Space*/));
    }
    private:
    vector<myType> objectData;
    size_t  xSize;
    size_t  ySize;
};
template<class myType>
inline ostream& operator<<(ostream& stream, SimpleContainer<myType>& object)
{
    object.printContainer(stream);
    return stream;
}
void sampleContainerInterfacing();
int main()
{
    sampleContainerInterfacing();
    return 0;
}
void sampleContainerInterfacing()
{
    static int const ConsoleWidth  = 80;
    static int const ConsoleHeight = 25;
    size_t width  = ConsoleWidth;
    size_t height = ConsoleHeight;
    SimpleContainer<int> mySimpleContainer(width, height, 0);
    cout << mySimpleContainer.getSize() << endl;
    mySimpleContainer(0, 0) = 5;
}

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100.
What will be the output of the following C++ code?
#include <iostream>
#include <string>
#include <tuple>
using namespace std;
int main()
{
	tuple <int, char, string> tp;
	tp = make_tuple("Hello", 4, 'c');
	return 0;
}

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