Explore topic-wise MCQs in Technical MCQs.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Technical MCQs knowledge and support exam preparation. Choose a topic below to get started.

1.

C++ Inheritance relationship is?

A. Association
B. Is-A
C. Has-A
D. None of the above
E.
Answer» C. Has-A
Discussion
2.

#include <iostream>using namespace std; class Base{public: int lfc() { cout << "Base::lfc() called"; } int lfc(int i) { cout << "Base::lfc(int i) called"; }}; class Derived: public Base{public: int lfc() { cout << "Derived::lfc() called"; }}; int main(){ Derived d; d.lfc(5); return 0;}19.___________ inheritance may lead to duplication of inherited members from a "grandparent" base class.

A. Multipath
B. Multiple
C. Multilevel
D. Hierarchical
Answer» B. Multiple
Discussion
3.

#include <iostream>using namespace std;class Base {};class Derived: public Base {}; int main(){ Base *p = new Derived; Derived *q = new Base;}18.What will be the output of the following program?

A. Base::lfc(int i) called
B. Derived::lfc() called
C. Base::lfc() called
D. Compiler Error
Answer» E.
Discussion
4.

Note:Includes all required header filesusing namespace std; class base { int arr[15];}; class b1: public base { }; class b2: public base { }; class derived: public b1, public b2 {}; int main(void){ cout << sizeof(derived); return 0;}17.What will be the output of this program?

A. error: invalid conversion from "Derived*" to "Base*"
B. No Compiler Error
C. error: invalid conversion from "Base*" to "Derived*"
D. Runtime Error
Answer» D. Runtime Error
Discussion
5.

Note:Includes all required header filesusing namespace std; class Base1 { public: ~Base1() { cout << " Base1" << endl; }}; class Base2 { public: ~Base2() { cout << " Base2" << endl; }}; class Derived: public Base1, public Base2 { public: ~Derived() { cout << " Derived" << endl; }}; int main(){ Derived d; return 0;} 16.Assume that an integer takes 2 bytes and there is no alignment in following classes, predict the output.

A. 30
B. 60
C. 0
D. 120
Answer» E.
Discussion
6.

Note:Includes all required header filesusing namespace std; class Base1 { public: Base1() { cout << " Base1" << endl; }}; class Base2 { public: Base2() { cout << "Base2" << endl; }}; class Derived: public Base1, public Base2 { public: Derived() { cout << "Derived" << endl; }}; int main(){ Derived d; return 0;} 15.Which of the following is true about the following program

A. Base1 Base2 Derived
B. Derived Base2 Base1
C. Derived
D. Compiler Dependent
Answer» C. Derived
Discussion
7.

Note:Includes all required header files using namespace std;struct a { int p; };struct b { int* x; };struct c : public a, public b { };int main() { c* p = new c; p->x = 0; cout << "Inherited"; return 0; } 14.What is the output of this program?

A. Compiler Dependent
B. Base1 Base2 Derived
C. Base2 Base1 Derived
D. Compiler Error
Answer» C. Base2 Base1 Derived
Discussion
8.

Note:Includes all required header files using namespace std; int main() { string s = "a long string"; s.insert(s.size() / 2, " * "); cout << s << endl; return 0; }13.What is the output of this program?

A. Inherited
B. Error
C. Runtime error
D. None of the mentioned
Answer» B. Error
Discussion
9.

Note:Includes all required header files using namespace std; class Base { public: Base(){} ~Base(){} protected: private: }; class Derived:public Base { public: Derived(){} Derived(){} private: protected: }; int main() { cout << "Executed" << endl; } 12.What is the output of this program?

A. long* string
B. a long st*ring
C. Depends on compiler
D. None of the mentione
Answer» D. None of the mentione
Discussion