Classes & Objects

Classes & Objects

Easy Questions

C++ Programming

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Questions and Answers
Standard Library
  1. What is the output of this program?
    #include <iostream>
        using namespace std;
        class BaseClass
        {
            public:
                BaseClass(){}
                ~BaseClass(){}
                protected:
                private: 
        };
        class DerivedClass:public BaseClass
        {
            public:
                DerivedClass(){}
                DerivedClass(){}
                private:
                protected:
        };
        int main()
        {
            cout << "The program exceuted" << endl;
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: B

    Compilation Error

    error: 'DerivedClass::DerivedClass()' cannot be overloaded
    error: with 'DerivedClass::DerivedClass()'

  1. What is the output of this program?
    #include <iostream>
        using namespace std;
        class ExceptionClass
        {
            public:
            ExceptionClass(int value) : mValue(value)
            {
            }
            int mValue;
        };
        class DerivedExceptionClass : public ExceptionClass
        {
            public:
                DerivedExceptionClass(int value, int anotherValue) : ExceptionClass(value),mAnotherValue(anotherValue)
                {
                }
                int mValue;
                int mAnotherValue;
        };
        void doSomething()
        {
            throw DerivedExceptionClass(10,20);
        }
        int main()
        {
            try
            {
                doSomething();
            }
            catch (DerivedExceptionClass &exception)
            {
                cout << "Caught Derived Class Exception";
            }
            catch (ExceptionClass &exception)
            {
                cout << "Caught Base Class Exception";
            }
            return 0;
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    As we are throwing the value from the derived class, it is arising an exception in derived class

  1. What is the output of this program?
    #include <iostream>
        #include <string>
        using namespace std;
        int main() 
        {
            string str = "Interview Mania";
            str.insert(str.size() / 3, " * ");
            cout << str << endl;
            return 0;
        }










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    In this program, We are placing the string based on the size of the string and it is a string hierarchy.

  1. How many types of guarantees are there in exception class can have?










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: B

    There are three types of guarantees in c++. They are weak, strong and no-throw.

  1. Which operator is used to create the user-defined streams in c++?










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    We can make user-defined types with streams by overloading the insertion operator (<<) to put objects into streams and the extraction operator (>>) to read objects from streams.